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Journal articles on the topic 'Sodium Hydroxide Method'

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Published: 5 June 2025

Last updated: 2 August 2025

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1

Lavrov, R. V., N. V. Kuvardin, and S. Narmatov. "Physical and Chemical Activation of Quartz Raw Materials with Sodium Hydroxide in the Ratio of the Eutectic Composition in the Na2O – SiO2 System." Proceedings of the Southwest State University. Series: Engineering and Technology 13, no. 4 (2024): 152–62. http://dx.doi.org/10.21869/2223-1528-2023-13-4-152-162.

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The purpose of this work was to continue research on the activation of quartz raw materials using alkali metal hydroxides. This paper presents a theoretical justification and practical confirmation of the physical and chemical activation of quartz raw materials by sodium hydroxide, taking into account the eutectic ratios in the Na2O–SiO2 system.Methods. Quartz glass sand VS-030-B was chosen as a source of quartz raw materials; as a sodium-containing raw material flake sodium hydroxide brand TR. For the scientific basis, the phase diagram of Na2O-SiO2 of Berezhny was used. To study the phase co

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Nakanishi, H., T. Ogata, Y. Kadotani, and Akira Izumi. "Wet-Etching Characteristics of SiCN Films Deposited by HWCVD Method." Advances in Science and Technology 81 (September 2012): 34–38. http://dx.doi.org/10.4028/www.scientific.net/ast.81.34.

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We investigated the wet-etching properties of SiCN films using chemical agents. Our results show that sodium hydroxide, potassium hydroxide and phosphoric acid etch SiCN films, while hydrochloric acid, sulfuric acid, acetic acid, ammonium chloride and sodium chloride cannot etch SiCN films.

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3

Larisa, Alagić-Džambić, Dacić Minela, Bašić Kenan, et al. "Spectrophotometric Determination of Sulpiride in Pharmaceutical Products." Pharmaceutical and Chemical Journal 7, no. 4 (2020): 75–79. https://doi.org/10.5281/zenodo.13955707.

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A simple spectrophotometric method was developed and validated for determination of Sulpiride in pharmaceutical products. The method was based using two different solvent: 0.1 mol/L sodium hydroxide and 0.1 mol/L hydrochloric acid. The absorbance maximum was at 291 nm. The correlation coefficient were r=0.9994 (in 0.1 mol/L sodium hydroxide as solvent) and r=1.0000 (in 0.1 mol/L hydrochloric acid as solvent). The method was validated and results obtained for the assay of three different brands of Sulpiride capsules, hard. The proposed method was successfully applied to the spectrophotometric d

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4

Zhang, Jian Wei, and Ji Wei Liu. "Preparation of Sodium Diacetate." Applied Mechanics and Materials 508 (January 2014): 79–82. http://dx.doi.org/10.4028/www.scientific.net/amm.508.79.

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The sodium diacetate using acetic acid and sodium hydroxide as materials was prepared in which one-step liquid-phase method and microwave method were adopted in the paper. By single factor experiment, the regularities of the influence of various factors including reaction temperature, reaction time and acetic acid-sodium hydroxide ratio on the yield of sodium diacetate were studied. Through the orthogonal experiment the optimum synthesis conditions of sodium diacetate were confirmed that the reaction temperature was 70°C, the reaction time was 60min and the acetic acid-sodium hydroxide ratio w

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RAJABZODA, N. KH, N. A. NAIMOV, A. MURODIYON, KH A. MIRPOCHAYEV, S. M. SHOKARIMOV, and KH KH USMONOV. "PRODUCTION OF PILOT BATCHES OF CRYOLITE USING SODIUM CHLORIDE AND HYDROXIDE AND THEIR TESTING IN ALUMINIUM PRODUCTION." Herald of Technological University 27, no. 4 (2024): 57–61. http://dx.doi.org/10.55421/1998-7072_2024_27_4_57.

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The paper presents the results of pilot batch production of cryolite using sodium chloride and sodium hydroxide by hydrochemical method, physical and chemical studies of the obtained products, as well as their testing in aluminium electrolysers with measurements of technological parameters before and after use. The conducted studies have shown that the process of production of a pilot batch of cryolite by hydrochemical method from hydrofluoric acid using aluminium hydroxide, sodium chloride and sodium hydroxide solutions proceeds at a temperature of 25 °C for 30-45 min. In this case, the yield

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Alghany K. lbraheem, Abed. "Spectrophotometric Assay of phenylphrine hydrochloride Viacuopling with Diazotised p-Nitroaniline, Application toPharmaceutical Preparation." Tikrit Journal of Pharmaceutical Sciences 5, no. 2 (2023): 182–91. http://dx.doi.org/10.25130/tjphs.2009.5.2.9.182.191.

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Simple, sensitive and reproducible spectrophotometric method was developed in aqueous medium and applicated for the estimation of pheylephrine hydrochloride in nasal drop and tussilet syrup. The method is based on the formation of orange coloured azo dye from the coup I ing of pheylephrine hydrochloride (PPH) with diazotised p-nitroaniline in alkaline medium of sodium hydroxide and sodium carbonate. The intensity of absorbance for the resulting orange azao-dye was measured at 490 nm in sodium hydroxide and at 487 nm in sodium carbonate. Beer's law was obeyed in the concentration ranges of 10-2

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A., L. J. RAO, and K. MALIK A. "Spectrophotometric Method for Determination of Tetramethylthiuram Disulphide by Extraction of its Chromium Complex into Isobutyl Methyl Ketone." Journal of Indian Chemical Society Vol. 67, July 1990 (1990): 615–16. https://doi.org/10.5281/zenodo.6243585.

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Department of Chemistry, Punjabi University, Patiala-147 002 <em>Manuscript received 27 March 1989, revised 29 January 1990, accepted 30 March 1990</em> Spectrophotometric Method for Determination of Tetramethylthiuram Disulphide by Extraction of its Chromium Complex into Isobutyl Methyl Ketone

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8

Mubarokah, Siti, Pada Mulia Raja, Rahimah, Rafael Remit Winardi, and Fachrizal. "PENGARUH PROSES NETRALISASI PADA SEMI VIRGIN RED PALM OIL DENGAN MENGGUNAKAN NATRIUM HIDROKSIDA (NaOH) TERHADAP KADAR ALB, KADAR KOTORAN DAN KADAR AIR." Jurnal Agro Fabrica 6, no. 1 (2024): 8–22. http://dx.doi.org/10.47199/jaf.v6i1.225.

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This research aims to determine the effect of the sodium hydroxide (NaOH) neutralization process in semi virgin red palm oil on free fatty acid levels, dirt levels and water content. Efforts to obtain the best quality red palm oil can be done by administering sodium hydroxide (NaOH). The method used in this research was a non-factorial Completely Randomized Design (CRD) using the chemical Sodium Hydroxide (NaOH) with concentrations of 3%, 4% and 5% of the sample weight. Each chemical and its concentration was repeated in 3 repetition units. The types of observations carried out are ALB levels,

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He, Bing-Xuan, Yong Liang, Ze-Kun Fan, Lue-Wei Xu, De-Gang Liu, and Guo-Zuan Xu. "Dissolution Behavior of Sodium Phosphate in a Na3PO4–Na2WO4–NaOH Solution System." Minerals 12, no. 6 (2022): 732. http://dx.doi.org/10.3390/min12060732.

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Sodium hydroxide autoclaving is the main method for smelting scheelite in China. In this method, sodium phosphate is added as an additive to realize the highly efficient decomposition of scheelite, and a crude sodium tungstate solution containing sodium phosphate and sodium hydroxide is obtained. In the subsequent process of ion exchange, phosphorus ions in the solution compete with the resin adsorption of tungstate, which reduces the adsorption capacity of the resin and endangers the purity of the subsequent sodium tungstate solution. To remove the phosphorus from crude sodium tungstate solut

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Xakimjonova, Mahbuba Xakimjonovna. "DEVELOPMENT OF SODIUM NITRITE EXTRACTION TECHNOLOGY USING CONVENTIONAL METHOD." INTERNATIONAL BULLETIN OF APPLIED SCIENCE AND TECHNOLOGY 3, no. 4 (2023): 830–32. https://doi.org/10.5281/zenodo.7863378.

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Sodium nitrite (NaNO2) is an important nitrite salt widely used in various industries, including food, pharmaceuticals, and chemicals. The conventional method for sodium nitrite extraction involves the reaction of nitrite ions with sodium chloride (NaCl) and sodium hydroxide (NaOH) in aqueous solution. This article provides an overview of the conventional method for sodium nitrite extraction, including the reaction mechanism, process optimization, and industrial applications.

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11

Santhaveesuk, Theerapong, Kwunta Siwawongkasem, Siriwimon Pommek, and Supab Choopun. "High Performance Humidity Sensor Based on ZnO Nanoparticles Synthesized by Co-Precipitation Method." Applied Mechanics and Materials 848 (July 2016): 99–102. http://dx.doi.org/10.4028/www.scientific.net/amm.848.99.

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ZnO nanoparticles were successfully synthesized by a low cost co-precipitation method using zinc nitrate and sodium hydroxide as the raw materials. It was observed that the synthesized temperatures greatly effect on the size of ZnO nanoparticles. The lower synthesized temperatures resulted in the smaller nanoparticles. By adjusting the mole ratio of sodium hydroxide, the size of ZnO nanoparticles was also changed. The smallest ZnO particles was 47 nm obtained with 0.7 mole of sodium hydroxide. The smallest ZnO nanoparticles from each synthesized temperatures were fabricated as humidity sensor,

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12

Rusalev, R. E., Denis A. Rogozhnikov, and A. A. Koblik. "Optimization of Alkaline Sulfide Leaching of Gold-Antimony Concentrates." Materials Science Forum 989 (May 2020): 525–31. http://dx.doi.org/10.4028/www.scientific.net/msf.989.525.

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This article covers a hydrometallurgical method for processing of a gold-antimony flotation concentrate in alkaline sulfide solutions. Thermodynamic analysis of the reaction stibnite with sulfide sodium and sodium hydroxide was performed. The chemical and phase compositions of the investigated material, mainly represented by compounds of antimony, silicon, calcium, sulfur and iron are studied. Phase composition: quartz, stibnite, quicklime, pyrite, dolomite and arsenopyrite. The dependences of the influence of sulfide sodium and sodium hydroxide concentration, and the liquid to solid ratio on

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13

Pilarska, Agnieszka, Marek Lukosek, Katarzyna Siwińska-Stefańska, Krzysztof Pilarski, and Teofil Jesionowski. "Use of MgO to Promote the Oxyethylation Reaction of Lauryl Alcohol." Polish Journal of Chemical Technology 16, no. 2 (2014): 36–42. http://dx.doi.org/10.2478/pjct-2014-0027.

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Abstract Synthesis of magnesium hydroxide was performed by the precipitation method with the use of magnesium sulfate and sodium hydroxide. The infiuence of temperature and ratio of reagents was studied. Magnesium hydroxides, and the magnesium oxides obtained from them by thermal decomposition, were analyzed to determine their bulk density, polydispersity and particle size. The magnesium oxide with the largest surface area was tested as a catalyst in the oxyethylation of lauryl alcohol, and shown to be selective but poorly reactive in comparison with commercially available catalysts. Further s

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14

Bykovsky, Nikolay Alekseevich, Pavel Azizurovich Rahman, Lyudmila Nikolaevna Puchkova, and Nadezhda Nikolaevna Fanakova. "Electrochemical Recycling of Still Waste Liquid in Ammonia Soda Production." Key Engineering Materials 743 (July 2017): 342–46. http://dx.doi.org/10.4028/www.scientific.net/kem.743.342.

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This scientific paper deals with the waste recycling process of soda ash production which comprised processing the still waste liquid with obtaining calcium hydroxide, sodium hydroxide and hydrochloric acid. Still waste liquid was treated with sodium hydroxide to transform calcium as fully as possible into insoluble form of calcium hydroxide. After detachment of precipitate, the filtrate consisting mainly of sodium chloride was treated by a three-compartment membrane cell. Authors have examined the main regularities of still waste liquid recycling on the basis of the specified method. It has b

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15

Kuanyshbekova, A. B., T. M. Serikov, P. A. Zhanbirbayeva, A. E. Sadykova, G. T. Beisembaeva, and A. S. Baltabekov. "The influence of the solution of their amount on the process of water splitting by the electrolysis method." Bulletin of the Karaganda University. "Physics" Series 105, no. 1 (2022): 123–29. http://dx.doi.org/10.31489/2022ph1/123-129.

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The article presents the results of an experimental study of the effect of the solution and their concentration on the process of splitting water by electrolysis under the action of a direct electric current using a Hoffman device. As solutions, we used sodium hydroxide, sodium phosphoric acid, sodium carbonate, sodium sulfate, sodium metaborate, sodium phosphoric acid 2 — substituted and potassium hydroxide. The number of salts in the solution varied from 0.2 mol to 0.8 mol. The study showed that the splitting water at constant current and voltage is influenced by both the nature of salts and

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16

I., O. Vedernykova, O. Tsapko Ye., and O. Titko T. "Synthesis of a Magnetite Nanoparticle System for use in Drugs with Magnetic Properties." Pharmaceutical and Chemical Journal 7, no. 2 (2020): 112–15. https://doi.org/10.5281/zenodo.13952525.

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Synthesis of magnetite particles was performed by chemical coprecipitation in alkaline medium (pH = 10-11) using the solutions of sodium hydroxide, potassium hydroxide and 25% ammonium hydroxide.  The use of an excess solution of ammonium hydroxide allows obtaining a system of magnetite particles, the saturation magnetization of which exceeds almost three times this parameter for particles synthesized using alkali solutions. It was found that the synthesis should be carried out with the use of excess of 1.75 iron (II) salt in ammonium hydroxide at pH = 10-11. It was proved (X-ray diffract

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17

Sulaiman, Mustapha, Naseer Inuwa Durumin Iya, and Mamudu Aliyu. "SYNTHESIS OF SILICA NANOPARTICLES FROM SUGARCANE WASTE: PRECIPITATION-BASED SIZE CONTROL AND CHARACTERIZATION." FUDMA JOURNAL OF SCIENCES 8, no. 3 (2024): 222–27. https://doi.org/10.33003/fjs-2024-0803-2425.

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Sugarcane waste, a byproduct of sugar production, poses significant environmental challenges through releasing harmful gases that contribute to air pollution and greenhouse gas emissions. This work presents the utilization of sugarcane waste to synthesize silica nanoparticles using the extraction-precipitation method. Fourier Transform Infrared (FT-IR) was used to identify the particles, and a Scanning Electron Microscope (SEM) was used to assess their size. By extracting silica from the waste material using sodium hydroxide and lowering the pH to achieve the precipitate, smaller-sized silica

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18

Chen, Zining, Zhiguo Chen, Junyan Yi, and Decheng Feng. "Preparation Method of Corn Stalk Fiber Material and Its Performance Investigation in Asphalt Concrete." Sustainability 11, no. 15 (2019): 4050. http://dx.doi.org/10.3390/su11154050.

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In this study, a bioresource material, corn stalks, were converted by a combination of physical and chemical methods into a corn stalk fiber material that can be utilized in an asphalt pavement. Firstly, corn stalk fiber was produced with different comminution times, mass fractions of sodium hydroxide solution, reaction times, and reaction temperatures. An orthogonal experimental method was employed to determine the optimal production process. The results show that the optimal comminution time was 3.5 min, and corn stalk should be reacted with a sodium hydroxide solution at 80 °C for 30 min to

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19

Ibrahim, Kamal E. E., Humeida A. El-Obeid, Elrasheed A. Gadkariem, and Mohammed M. Mutasim. "Spectrophotometric Methods for the Determination of Cefprozil in Bulk and Dosage Form." International Journal of Biomedical Science 5, no. 3 (2009): 267–74. http://dx.doi.org/10.59566/ijbs.2009.5267.

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Two simple spectrophotometric methods were developed for the determination of cefprozil in pure bulk and in tablets forms. The first is a colorimetric method based on the coupling of cefprozil, after being hydrolyzed by sodium hydroxide (0.1N), with ascorbic acid as a chromogen (method A). It has been established that cefprozil reacts with ascorbic acid to form a 1:1 water soluble colored product with maximum absorbance (λmax) at 408 nm and molar absorptivity of 7.2 × 103L mol-1 cm-1. The second method (Method B) utilizes a direct reaction between cefprozil and sodium hydroxide (1N). A colored

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20

Meng, Hua. "Deep desulfurization of sintering flue gas in iron and steel works based on low-temperature oxidation." Open Chemistry 18, no. 1 (2020): 1370–80. http://dx.doi.org/10.1515/chem-2020-0169.

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AbstractThe deep desulfurization method of sintering flue gas based on the low-temperature oxidation method is studied. Based on the analysis of the main principle of deep desulfurization of sintering flue gas, a deep desulfurization system of sintering flue gas is constructed, which is composed of an absorption washing unit and a washing solution treatment unit. Sodium hydroxide solution is used as the desulfurizing absorbent to mix with the sintering flue gas entering the reaction tower. Sulfur dioxide in the sintering flue gas reacts with sodium hydroxide to generate sodium sulfite, and sod

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Helaleh, Murad I. H. "Simple Kinetic Method for Assay of Menadione In Pharmaceuticals." Journal of AOAC INTERNATIONAL 80, no. 4 (1997): 756–61. http://dx.doi.org/10.1093/jaoac/80.4.756.

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Abstract A new simple and sensitive kinetic method for determining menadione in pure form and injection form is described, based on the reaction between menadione and sodium hydroxide to form a colored complex with a strong absorbance at 450 nm. The method is valid for determining menadione at concentrations ranging from 5.807 × 10-1 to 7.549 × 10 3 M. The complex forms at a 2:3 concentration ratio of menadione with respect to sodium hydroxide. The formation constant is 8.37 × 1015, and the molar absorptivity is 6.55 × 102 L/mol cm. The precio sion and accuracy of the method and the effect of

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Yang, Xiu-Li, Xiao-Hui Wang, Chang Wei, Shi-Li Zheng, and Qing Sun. "Decomposition of Niobium Ore by Sodium Hydroxide Fusion Method." Metallurgical and Materials Transactions B 44, no. 1 (2012): 45–52. http://dx.doi.org/10.1007/s11663-012-9766-8.

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23

U., S. RAY, D. PRADHAN B., and B. KAR S. "Selective Extraction of Copper(II) with High Molecular Weight Carboxylic Acid and its Applications." Journal of Indian Chemical Society Vol. 63, Mar 1986 (1986): 326–28. https://doi.org/10.5281/zenodo.6254094.

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Department of Chemistry, Visva-Bharati, Santiniketan-731 <em>235</em> <em>Manuscript received 3 April 1985, revised 6 September 1985, accepted 24 December 1985</em> Comparative extraction behaviour of copper(II) has been performed with high molecular weight carboxylic acids, such as versatic 9, versatic 911, versatic 10 and SRS 100 using benzene as diluent The effect of pH, extractant concentration, metal ion concentration, diluent and contact time on the extraction of Cu<em><sup>II</sup></em> have been studied Copper has been quantitatively extracted at pH 6.0 9.0 with versatic 911 dilut

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Zhao, Jian Hai, and Yan Ping Lai. "Surface Modification and Preparation of High Purity Nanometer Magnesium Hydroxide Using Impinging Stream." Materials Science Forum 675-677 (February 2011): 847–51. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.847.

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High purity nanometer magnesium hydroxide is produced by impinging stream reaction crystallization method using bischofite as feedstock. Effects of operation conditions on the impinging stream of Mg (OH)2 are reported and the control factors of purity are confirmed. The morphology of the powder was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Result shows that purity of Mg (OH)2 can reach 99% and the mean size of crystal is 13.5nm. Surface modification of nano-sized magnesium hydroxide using four surface modifiers such as sodium steatite, sodium laurylsu

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Jeon, Yong Min, Jin Gu Kwon, Si Hong Ryu, Yeong Cheol Lee, and Seong Eui Lee. "A Study on Sebum Hardening Effect of ZnO Powder." Korean Journal of Metals and Materials 59, no. 3 (2021): 195–200. http://dx.doi.org/10.3365/kjmm.2021.59.3.195.

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Zinc oxide is transparent inorganic UV absorber and widely used as a sunscreen. But sunscreen on the skin is easily erased by sebum, so zinc oxide with a sebum curing function was studied. In this study, a zinc oxide powder was prepared using zinc chloride and sodium hydroxide via a hydrothermal synthesis method. The process conditions including reaction temperature and sodium hydroxide ratio were determined. Particle size was determined using XRD and SEM, and process tendencies were checked using the gelling test method. When the sodium hydroxide ratio was lower than 58.7 wt%, the gelling tim

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Mohammed, Asem Hassan. "Studying the Improvement of the Solubility of Cellulosic Fibers." Journal of Engineering 22, no. 7 (2017): 21–37. http://dx.doi.org/10.31026/j.eng.2016.07.13.

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This study focuses for improving the increase the solubility of fiber cellulose in sodium hydroxide solution in concentrations ranging from (4- 12%), from one point of view and from other point of view in (sodium hydroxide and urea) solution concentration (6% NaOH + 4% urea), under low temperature (- 15, - 20 Co) , depending on the principle of reducing the degree of polymerization for fiber cellulose, which is represented in our tests cotton linter who its represent (Whatman filter paper, Grade 1), some samples subjected to chemical pretreatment as simulation the method of decomposition of ce

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Yao, Xiaoling, Rui Peng, Chungui Du, et al. "A two-step method for fabricating bamboo culm coated with MgAl-LDHs and its fire resistance properties." BioResources 14, no. 3 (2019): 5150–61. http://dx.doi.org/10.15376/biores.14.3.5150-5161.

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To enhance the fire-resistance of bamboo, the bamboo was first exposed to sodium hydroxide solution, and then immersed in a suspension of magnesium aluminum layered double hydroxides (MgAl-LDHs) to fabricate modified bamboo (NLB) with a coating of MgAl-LDHs on the surface. X-ray photoelectron spectroscopy showed that the surface of bamboo was coated by the MgAl-LDHs after modification. Fourier transform infrared spectroscopy analysis demonstrated that more hydroxyl groups were available on the bamboo surface after pretreatment with sodium hydroxide solution. The morphology of the MgAl-LDHs coa

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Santhaveesuk, Theerapong, Yoottana Keawtoakrue, Kwunta Siwawongkasem, and Supab Choopun. "Size and Shape Tailoring of ZnO Nanoparticles." Key Engineering Materials 675-676 (January 2016): 61–64. http://dx.doi.org/10.4028/www.scientific.net/kem.675-676.61.

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ZnO nanoparticles were successfully synthesized via the co-precipitation method using zinc nitrate and sodium hydroxide as raw materials. Size and shape of ZnO nanoparticles were well controlled by varying the ratio of sodium hydroxide solutions (0.5-0.9 mole) and the synthesized temperatures (65, 75 and 85 °C). ZnO nanoparticles exhibited a high degree crystallinity with wurtzite hexagonal structure for all conditions carried out using SEM, XRD, EDS and Raman. It was clearly observed that both sodium hydroxide solution and synthesized temperatures strongly affected on the size and shape of Zn

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Cheng, Baojun, Xiaowei Gu, Haoyue Hu, Yaning Kong, and Pengyu Huang. "The Mechanical Properties and Mechanisms in Contact-Hardening Behavior of Silica-Alumina Mine Solid Waste." Buildings 14, no. 4 (2024): 922. http://dx.doi.org/10.3390/buildings14040922.

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There are some limitations in the application of tuff powder as a supplementary cementitious material (SCM). Exploring its feasibility in new fields will consume a large amount of silica-alumina mine solid wastes. This study has investigated the mechanical properties and mechanism in contact-hardening of tuff powder with a method of compression molding. The compressive strength of specimens was tested, and the X-ray diffraction (XRD), thermogravimetric analysis (TG), scanning electron microscopy (SEM), and Mercury intrusion porosimetry (MIP) methods were used to reveal the mechanism of contact

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Leaist, Derek G. "Moments analysis of restricted ternary diffusion: sodium sulfite + sodium hydroxide + water." Canadian Journal of Chemistry 63, no. 11 (1985): 2933–39. http://dx.doi.org/10.1139/v85-486.

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Ternary diffusion coefficients can be determined from restricted-diffusion experiments by evaluating zeroth and first time moments of the difference in a concentration-dependent property measured at two levels along the diffusion column. The method is used to determine ternary diffusion coefficients for aqueous sodium sulfite + sodium hydroxide solutions from conductance measurements. It is shown that these data can be analyzed to obtain the ternary diffusivity of sulfur dioxide in strongly alkaline solutions where sulfite is the major transporting species for the sulfur dioxide component. At

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Wanta, Kevin Cleary, Stephen Lim, Ratna Frida Susanti, Gelar Panji Gemilar, Widi Astuti, and Himawan Tri Bayu Murti Petrus. "Effect of Surfactant Type on Synthesis and Characteristics of Nanonickel Hydroxide." Jurnal Rekayasa Proses 15, no. 2 (2021): 217. http://dx.doi.org/10.22146/jrekpros.69723.

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Nickel hydroxide has a vital role in various applications, especially as a support material for energy storage materials. Nickel hydroxide can be synthesized through the hydroxide precipitation method. However, the product formed by this method may be large or more than 100 nm because the agglomeration step can occur easily. This present work aims to study the effect of surfactant types in the synthesis and characterization of nickel hydroxide nanoparticle. Nickel sulfate (NiSO4) solution was used as a precursor solution, while 5M sodium hydroxide (NaOH) solution was used as a precipitation ag

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Cao, Yali, Lang Liu, Dienzeng Jia, and Ding Quan Xiao. "Rapid Synthesis of Zinc Oxide and Lead Oxide Nanorods by One-Step Solid-State Reaction Methods at Ambient Conditions." Materials Science Forum 475-479 (January 2005): 3579–82. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.3579.

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A simple and facilitate method was reported to synthesize zinc oxide and lead oxide nanorods. Two metal oxides nanorods were directly obtained from grinding solid metallic salts and sodium hydroxide in agate mortar with the assistance of a suitable surfactant in only one step, which is different from the results of hydroxides in solution. The as-prepared products were characterized by XRD, TEM and SEM. An explanation describing possible mechanism for the rod-formation is given.

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Cloutier, Caroline R., Akram Alfantazi, and Elod Gyenge. "Physicochemical Properties of Alkaline Aqueous Sodium Metaborate Solutions." Journal of Fuel Cell Science and Technology 4, no. 1 (2006): 88–98. http://dx.doi.org/10.1115/1.2393310.

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Background: The transition to a hydrogen fuel economy is hindered by the lack of a practical storage method and concerns associated with its safe handling. Chemical hydrides have the potential to address these concerns. Sodium borohydride (sodium tetrahydroborate, NaBH4), is the most attractive chemical hydride for H2 generation and storage in automotive fuel cell applications, but recycling from sodium metaborate (NaBO2), is difficult and costly. An electrochemical regeneration process could represent an economically feasible and environmentally friendly solution. Method of Approach: We repor

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Wang, Wei-ming, Zai-sheng Cai, and Jian-yong Yu. "Study on the Chemical Modification Process of Jute Fiber." February 2010 9, no. 2 (2010): 23–29. http://dx.doi.org/10.32964/tj9.2.23.

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Degumming of pre-chlorite treated jute fiber was studied in this paper. The effects of sodium hydroxide concentration, treatment time, temperature, sodium silicate concentration, fiber-to-liquor ratio, penetrating agent TF-107B concentration, and degumming agent TF-125A concentration were the process conditions examined. With respect to gum decomposition, fineness and mechanical properties, sodium hydroxide concentration, sodium silicate concentration, and treatment time were found to be the most important parameters. An orthogonal L9(34) experiment designed to optimize the conditions for degu

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Wang, Wei-ming, Zai-sheng Cai, and Jian-yong Yu. "Study on the Chemical Modification Process of Jute Fiber." Journal of Engineered Fibers and Fabrics 3, no. 2 (2008): 155892500800300. http://dx.doi.org/10.1177/155892500800300203.

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Degumming of pre-chlorite treated jute fiber was studied in this paper. The effects of sodium hydroxide concentration, treatment time, temperature, sodium silicate concentration, fiber-to-liquor ratio, penetrating agent TF-107B concentration and degumming agent TF-125A concentration were the process conditions examined. With respect to gum decomposition, fineness and mechanical properties, sodium hydroxide concentration, sodium silicate concentration and treatment time were found to be the most important parameters. An orthogonal L9(34) experiment designed to optimize the conditions for degumm

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Khdera, Hadi Aqel. "Design, synthesis and characterization of new azoflavone derivatives through diazotisation - coupling reactions of aromatic amines (sulfanilic acid, 2-amino pyridine)." Current Chemistry Letters 13, no. 3 (2024): 477–82. http://dx.doi.org/10.5267/j.ccl.2024.3.002.

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In this research, new azochalcone derivatives (6, 7) were synthesized by using three methods: the first one is diazotization - coupling method of different aromatic amines (sulfanilic acid, 2-aminopyridine) with chalcone (5), the second, aldol condensation method of azoaryl hydroxyacetophenone compounds with 4-dimethylamino benzaldehyde in presence of sodium hydroxide as a catalyst, the last one is method of aldol condensation of azoaryl hydroxyacetophenone compounds with 4-dimethylaminobenzaldehyde in presence of piperidine as an organic catalyst. The yield was the best by using the aldol con

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Kusmiran, Amirin, and Rita Desiasni. "Analisis Pengaruh Konsentrasi Natrium Hidroksida terhadap Sifat Mekanik Biokomposit Berpenguat Serat Sisal." Jurnal Fisika 10, no. 2 (2020): 11–18. http://dx.doi.org/10.15294/jf.v10i2.25462.

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The mechanical properties of natural fibers are continuous development as the alternatively synthetic fibers because of the natural fibers are non-corrosive, lightweight, and environmental advantages. However, these fibers have poor interfacial adhesion properties as the fibers if used as bio-composite material. This problem can be solved by the surface modification method by the sodium hydroxide treatment used to improve the mechanical properties. A sodium hydroxide concentration which it used at 0 wt%, 5 wt%, 10 wt%, and 15 wt% and the sisal fibers were soaked in that a concentration for 2 h

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F. E. Yunita, A. H. Yuwono, J. Irawan, et al. "SYNTHESIS OF SODIUM STANNATE USING ALKALINE PRESSURE LEACHING PROCESS." RASAYAN Journal of Chemistry 17, no. 01 (2024): 230–35. http://dx.doi.org/10.31788/rjc.2024.1718674.

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Sodium stannate has numerous applications, including electroplating, tin alloy, catalysts, precursor to flame retardants, and also can be used as solid electrolytes and electrode materials in emerging battery systems. The primary method for producing sodium stannate typically involves the reaction between tin metal and sodium hydroxide solution. However, the procedure exhibited several limitations, such as high energy consumption, a long process flow for the production of metallic tin, as well as the release of potentially hazardous gases. Therefore, the present study focused on synthesizing s

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Yatsenko, Elena A., Boris M. Goltsman, Andrey I. Izvarin, et al. "Recycling Ash and Slag Waste from Thermal Power Plants to Produce Foamed Geopolymers." Energies 16, no. 22 (2023): 7535. http://dx.doi.org/10.3390/en16227535.

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Ash and slag waste (ASW) from coal combustion creates significant environmental and economic challenges. A promising method of ASW recycling is alkali activation with geopolymer material formation. This study investigates the influence of activating solution components (sodium hydroxide and sodium silicate) on the formation of porous geopolymers using ASW of different origins. The sodium hydroxide content of 0–4 wt.% and the sodium silicate content of 17–25 wt.% were studied. An increase in sodium hydroxide resulted in decreased density, but it adversely affected the strength. An increase in s

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Chen, Yu-Qiao, Ying-Jie Zhu, and Zhi-Chao Xiong. "Ultralong Nanowires of Cadmium Phosphate Hydroxide Synthesized Using a Cadmium Oleate Precursor Hydrothermal Method and Sulfidation Conversion to Ultralong CdS Nanowires." Molecules 29, no. 2 (2024): 549. http://dx.doi.org/10.3390/molecules29020549.

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Ultralong nanowires with ultrahigh aspect ratios exhibit high flexibility, and they are promising for applications in various fields. Herein, a cadmium oleate precursor hydrothermal method is developed for the synthesis of ultralong nanowires of cadmium phosphate hydroxide. In this method, water-soluble cadmium salt is used as the cadmium source, water-soluble phosphate is used as the phosphorus source, and sodium oleate is adopted as a reactant to form cadmium oleate precursor and as a structure-directing agent. By using this method, ultralong nanowires of cadmium phosphate hydroxide are succ

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Acar, Ayda, Ayris Ozturk, Berke Köklüce, Bengu Gerceker Turk, and Tuğrul Dereli. "Long-Term Outcomes of Surgical and Chemical Matricectomy for Ingrown Toenail Management: A Retrospective Study." Dermatology Practical & Conceptual 15, no. 2 (2025): 4883. https://doi.org/10.5826/dpc.152a4883.

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Introduction: Matricectomy is an effective treatment method for ingrown toenails. Objective: We aimed to examine the outcomes of matricectomy procedures performed for ingrown toenails at a dermatology clinic, including patient characteristics, recurrence rates, post-operative complications, and patient satisfaction associated with these procedures. Methods: Records of patients who underwent surgical or chemical matricectomy for ingrown toenails in our dermatological surgery unit between 2009 and 2023 were retrospectively reviewed. Results: A total of 300 matricectomies in 164 patients were exa

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Acar, Ayda, Ayris Ozturk, Berke Köklüce, Bengu Gerceker Turk, and Tuğrul Dereli. "Long-Term Outcomes of Surgical and Chemical Matricectomy for Ingrown Toenail Management: A Retrospective Study." Dermatology Practical & Conceptual 15, no. 2 (2025): 4883. https://doi.org/10.5826/dpc.1502a4883.

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Introduction: Matricectomy is an effective treatment method for ingrown toenails. Objective: We aimed to examine the outcomes of matricectomy procedures performed for ingrown toenails at a dermatology clinic, including patient characteristics, recurrence rates, post-operative complications, and patient satisfaction associated with these procedures. Methods: Records of patients who underwent surgical or chemical matricectomy for ingrown toenails in our dermatological surgery unit between 2009 and 2023 were retrospectively reviewed. Results: A total of 300 matricectomies in 164 patients were exa

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Adebowale, E. A., E. R. Ørskov, and P. M. Hotten. "Rumen degradation of straw. 8. Effect of alkaline hydrogen peroxide on degradation of straw using either sodium hydroxide or gaseous ammonia as source of alkali." Animal Production 48, no. 3 (1989): 553–59. http://dx.doi.org/10.1017/s0003356100004074.

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ABSTRACTThe comparative effect of spraying wheat straw, maize stover and maize cob with sodium hydroxide and alkaline (sodium hydroxide treated) hydrogen peroxide over a range of moisture contents was evaluated. The effect of concentration of hydrogen peroxide on straw subsequently ammoniated was also investigated. No differences (P < 0·05) were detected between sodium hydroxide and similar concentrations of sodium hydroxide used to provide alkali for alkaline hydrogen peroxide treatments. When however, gaseous ammonia was used as the source of alkali there were significant linear increases

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Hartati, Hartati, Alfa Akustia Widati, Tanti Kartika Dewi, and Didik Prasetyoko. "Direct Synthesis of Highly Crystalline ZSM-5 from Indonesian Kaolin." Bulletin of Chemical Reaction Engineering & Catalysis 12, no. 2 (2017): 251. http://dx.doi.org/10.9767/bcrec.12.2.809.251-255.

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Direct synthesis of ZSM-5 from Indonesian kaolin without calcination for the formation of metakaolin was done through the addition of an alkaline solution (sodium fluoride and sodium hydroxide) and the fusion using sodium hydroxide. Crystallization was conducted through hydrothermal method at 80 °C for four days. XRD diffractogram and FTIR spectra showed that the addition of sodium fluoride solution in the ratio Si/Al = 100 could produce highly crystalline ZSM-5, whereas the use of a sodium hydroxide solution and fusion process did not produce the crystalline ZSM-5. Copyright © 2017 BCREC Grou

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Zuidema, Daniel R., Katherine J. Wert, Sarah L. Williams, et al. "Novel Method of Reducing Ketones Using Sodium Hydroxide in Isopropanol." Synthetic Communications 40, no. 8 (2010): 1187–91. http://dx.doi.org/10.1080/00397910903061043.

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Demirkan, Elif, Tuba Avci, and Yakup Aykut. "Protease immobilization on cellulose monoacetate/chitosan-blended nanofibers." Journal of Industrial Textiles 47, no. 8 (2017): 2092–111. http://dx.doi.org/10.1177/1528083717720205.

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Chitosan-blended cellulose monoacetate nanofibers were prepared through electrospinning process. Neat nanofibers and their sodium hydroxide-treated analogs were used as support surfaces for protease immobilization via physical adsorption method. Morphologies of the nanofibers were observed with a scanning electron microscopy. Chemical analyses were conducted with Fourier transform infrared spectroscopy, and thermal analyses were carried out with differential scanning calorimeter and thermogravimetric analyzer. Immobilized enzyme activities were measured by using casein substrate. In order to t

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Haydarov, A. A., G. I. Alyshanly, S. A. Kuliyev, and D. T. Mehmet. "OBTAINING OF ALKALINE FROM ALUMINATE SOLUTION BY ELECTRODIALYSIS METHOD." Azerbaijan Chemical Journal, no. 2 (June 19, 2023): 154–62. http://dx.doi.org/10.32737/0005-2531-2023-2-154-162.

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In the study, electrodialysis of alunite mud and aluminum hydroxide washing solutions, obtained during the processing of alunite ore, has been carried out in the study. Acid and alkali extraction from the electrodialysis process, as well as the conditions for solidification of the obtained alkali and acid, has been researched. PC Cell 64004 electrodialysis device and bipolar, anion, cation exchange membranes and the processes occurring in the membranes has been used in the experiments. Studies show that during the electrodialysis of sodium sulfate solution, if it is possible to obtain a 3–4% s

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El-Mir, Abdulkader, Hilal El-Hassan, Amr El-Dieb, and Abdelrahman Alsallamin. "Optimization of Dune Sand-Slag Blended Geopolymer Mortar Using Taguchi Method." MATEC Web of Conferences 364 (2022): 02009. http://dx.doi.org/10.1051/matecconf/202236402009.

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Achieving optimum performance of geopolymer mortar intended for structural and repair applications is a complex task with various factors being considered prior to production. This study explores the influence of mix design parameters on the fresh and hardened properties of geopolymer mortar made with treated dune sand (TDS) and granulated blast furnace slag (BFS). A total of nine geopolymer mortar mixtures were designed following the Taguchi method for four factors, each with three levels. These factors included BFS replacement rate by TDS, alkali-activator solution to binder ratio (AAS/B), s

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Chen, Hong, Bao-Wei Zhu, Haiyan Liu, He Yang, and Li-Peng Jiang. "Preparation of modified magnesium hydroxide and its application in PA66." E3S Web of Conferences 185 (2020): 04054. http://dx.doi.org/10.1051/e3sconf/202018504054.

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In the present study,the modified magnesium hydroxide was prepared by precipitation method using Mg(NO3), NaOH, and silane coupling 702 modifier as raw materials. The optimal reaction conditions were obtained as follows: sodium hydroxide was added to magnesium nitrate solution by dropping, the dropping speed of sodium hydroxide was 2ml/min, the reaction temperature was 60℃, and the ratio of modifier dosage to total solution volume was 7/100(g/ml). The oil absorption value and XRD were used to characterize the modified Mg(OH)2. In the application, the modified magnesium hydroxide was mixed with

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Larisa, Alagić-Džambić, Gjuraj Mergime, Dacić Minela, Hukić Minela, and Džambić Mirsad. "UV VIS method of estimation for Glimepiride in Tablets." Chemistry Research Journal 8, no. 6 (2023): 1–4. https://doi.org/10.5281/zenodo.11390450.

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<strong>Abstract </strong> A simple spectrophotometric method was developed and validated for determination of Glimepiride in pharmaceutical products. The method was based using 0.1 mol / L sodium hydroxide as solvent. The absorbance maximum was at 235 nm, 233 nm, and 237 nm. The correlation coefficients on three absorbance point were r=0.9989. The method was validated, and results obtained for the assay of five different brands of Glimepiride tablets. The proposed method was successfully applied to the spectrophotometric determination Glimepiride.

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