Log in

Relevant bibliographies by topics / Silica sulfuric acid (SSA) / Journal articles

To see the other types of publications on this topic, follow the link: Silica sulfuric acid (SSA).

Journal articles on the topic 'Silica sulfuric acid (SSA)'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Silica sulfuric acid (SSA).'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Morteza, Shiri, Daraei Masoume, Derakhshan‑Panah Fateme, Ali Zolfigol Mohammad, G. Kruger Hendrik, and Mokhlesi Mohammad. "Synthesis of tetrahydropyridines by one-pot multicomponent reaction using nano-sphere silica sulfuric acid." Journal of the Iranian Chemical Society 12, no. 5 (2014): 855–61. https://doi.org/10.5281/zenodo.4240642.

Full text

Abstract:

A highly efficient protocol for the synthesis of 1,2,3,4-tetrahydropyridines in the presence of nano-sphere silica sulfuric acid (NS-SSA) was used for good yields by one-pot multicomponent reaction (MCRs). The reagent nano-sphere silica sulfuric acid (NS-SSA) has several advantages, such as easy workup, nontoxicity, convenience and high yields of products.

APA, Harvard, Vancouver, ISO, and other styles

2

Wangsa, Wangsa, Remi Ayu Pratika, Tyas Sekar Ningrum, and Karna Wijaya. "Sulfuric Acid-Activated Silica Gel as a Potential Solid Acid Catalyst." Key Engineering Materials 920 (May 16, 2022): 159–65. http://dx.doi.org/10.4028/p-3y31y4.

Full text

Abstract:

The conversion of silica gels into sulfated silicas (SO4/SiO2) have been carried out. The sulfation process of the catalysts was carried out by impregnation of sulfuric acids at concentrations of 1; 2; and 3 M and calcination temperatures of 500, 600, and 700 °C. Sulfation with 2 M H2SO4 and calcination temperature of 600 °C (SS2-600) produced a catalyst with the highest acidity value (5.13 mmol NH3 g-1). XRD analysis showed the formation of amorphous SiO2 phase, whereas SSA analysis showed that the SS2-600 catalyst had a mesoporous structure with a surface area of 147.728 m2/g, a total pore v

APA, Harvard, Vancouver, ISO, and other styles

3

Hosseinahli, Nasrin, Maherram Hasanov, and Maryam Abbasi. "Heavy metals’ removal from aqueous environments using silica sulfuric acid." Journal of Water Reuse and Desalination 11, no. 3 (2021): 508–19. http://dx.doi.org/10.2166/wrd.2021.085.

Full text

Abstract:

Abstract There is a growing environmental and health concern associated with contamination by heavy metals. It has also been intensified due to an increase of the exposure to such pollutants as a result of industrial and technological growth. Therefore, it is necessary to remove heavy metals in contaminated water to eliminate the associated risks. This study focused on the removal of heavy metal ions using silica sulfuric acid (SSA). A comprehensive study was conducted to assess the effect of different factors on the adsorption by SSA as well as selectivity properties of the adsorbent, kinetic

APA, Harvard, Vancouver, ISO, and other styles

4

Habibi, Davood, Hiva Nabavi, and Mahmoud Nasrollahzadeh. "Silica Sulfuric Acid as an Efficient Heterogeneous Catalyst for the Solvent-Free Synthesis of 1-Substituted 1H-1,2,3,4-Tetrazoles." Journal of Chemistry 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/645313.

Full text

Abstract:

Silica sulfuric acid (SSA) was found to be an efficient heterogeneous catalyst for the synthesis of 1-substituted 1H-1,2,3,4-tetrazoles from the reaction of primary amines with triethyl orthoformate and sodium azide under thermal and solvent-free conditions.

APA, Harvard, Vancouver, ISO, and other styles

5

Wu, H., Y. Shen, L.-y. Fan, Y. Wan, and D.-q. Shi. "Solid Silica Sulfuric Acid (SSA)-Catalyzed Acetylation of Aldehydes and Sugars." Synfacts 2006, no. 11 (2006): 1187. http://dx.doi.org/10.1055/s-2006-949403.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Maleki, Behrooz. "An efficient synthesis of 2-arylbenzothiazoles using silica sulfuric acid, oxalic acid and aluminum chloride hydrate as heterogeneous and homogeneous catalyst systems." Collection of Czechoslovak Chemical Communications 76, no. 1 (2010): 27–37. http://dx.doi.org/10.1135/cccc2010111.

Full text

Abstract:

A convenient method for the synthesis of 2-arylbenzothiazoles from condensation of aromatic/heteroaromatic aldehydes with 2-aminothiophenol has been developed using inexpensive, green and reusable solid acids – silica sulfuric acid (SSA), oxalic acid or AlCl3·6H2O as efficient catalysts. The reactions occurred under mild conditions to afford the corresponding 2-arylbenzothiazoles in good to excellent yields.

APA, Harvard, Vancouver, ISO, and other styles

7

Baghernejad, Bita. "Silica Sulfuric Acid (SSA): An Efficient and Heterogeneous Catalyst for Organic Transformations." Mini-Reviews in Organic Chemistry 8, no. 1 (2011): 91–102. http://dx.doi.org/10.2174/157019311793979963.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Hajipour, Abdol R., Amin Zarei, and Aronold E. Ruoho. "Efficient Method for Iodination of Alcohols using KI/Silica Sulfuric Acid (SSA)." Synthetic Communications 36, no. 8 (2006): 1039–50. http://dx.doi.org/10.1080/00397910500503421.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Zhao, Dandan, Mengze Ma, Jinjin Qian, Yaxu Wang, Zichuan Ma, and Xiaolong Ma. "Influence of Impregnation Medium on the Adsorptive Performance of Silica Sulfuric Acid for the Removal of Gaseous o-Xylene: Comparison on Ethyl Acetate and Water." Catalysts 12, no. 7 (2022): 737. http://dx.doi.org/10.3390/catal12070737.

Full text

Abstract:

Silica supported sulfuric acid (SSA) has been demonstrated to be capable of effectively removing phenyl VOCs through the reaction-type adsorption mechanism. The effects of the solvent (water, ethyl acetate) used to impregnate silica gel with H2SO4 solution in order to prepare SSA adsorbents have been studied. As-prepared two series SSA(E)-x and SSA(W)-x materials (x = 1, 2, 3, 4) were characterized by TG, SEM/EDS and N2 adsorption/desorption techniques, and their breakthrough adsorption performances were evaluated from experimental and theoretical aspects. The results showed that the H2SO4 loa

APA, Harvard, Vancouver, ISO, and other styles

10

Lin, Wei, Cangwei Zhuang, Xiuxiu Hu, Juanjuan Zhang, and Juxian Wang. "Alcohol Participates in the Synthesis of Functionalized Coumarin-Fused Pyrazolo[3,4-b]Pyridine from a One-Pot Three-Component Reaction." Molecules 24, no. 15 (2019): 2835. http://dx.doi.org/10.3390/molecules24152835.

Full text

Abstract:

A concise and efficient approach to synthesizing coumarin-fused pyrazolo[3,4-b]pyridine via silica sulfuric acid (SSA) catalyzed three-component domino reaction under microwave irradiation has been demonstrated. Participation of various alcohols in construction of coumarin derivatives has been described for the first time. Short reaction time, high yields, one-pot procedure, usage of eco-friendly catalyst, and solvent are the key features of this method.

APA, Harvard, Vancouver, ISO, and other styles

11

Bakherad, Mohammad, Ali Keivanloo, Masoumeh Siavashi, and Mina Omidian. "Three-component synthesis of imidazo[1,2-c]pyrimidines using silica sulfuric acid (SSA)." Chinese Chemical Letters 25, no. 1 (2014): 149–51. http://dx.doi.org/10.1016/j.cclet.2013.10.013.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

N., G. Salunkhe, V. Thakare N., A. Ladole C., and S. Aswar A. "Green synthesis of quinoline-4-carboxylic acid derivatives using silica sulfuric acid as an efficient catalyst." Journal of Indian Chemical Society Vol. 92, Aug 2015 (2015): 1295–98. https://doi.org/10.5281/zenodo.5599012.

Full text

Abstract:

Department of Chemistry, Sant Gadge Baba Amravati University, Amravati-444 602, Maharashtra, India <em>E-mail</em> : aswaranand@gmail.com <em>Manuscript received online 22 October 2014, accepted 16 December 2014</em> Quinoline-4-caboxylic acid derivatives were synthesized in moderate to high yields via one-pot three components Doebner reaction of pyruvic acid, aldehydes and anilines in the presence of silica sulfuric acid as an efficient catalyst, under very mild conditions with excellent yields. The notable advantages of this protocol are work-up procedure is easy and the catalyst can be reco

APA, Harvard, Vancouver, ISO, and other styles

13

Baghernejad, Bita. "ChemInform Abstract: Silica Sulfuric Acid (SSA), an Efficient and Heterogeneous Catalyst for Organic Transformations." ChemInform 42, no. 34 (2011): no. http://dx.doi.org/10.1002/chin.201134223.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Mahmoodi, Farhad, Reza Jalilzadeh yengejeh, Farhang Tirgir, and Mehraban Sadeghi. "Removal of 1-naphthol from Water via Photocatalytic Degradation Over N,S-TiO2/ Silica Sulfuric Acid under visible Light." Journal of Advances in Environmental Health Research 10, no. 1 (2022): 7. http://dx.doi.org/10.32598/jaehr.10.1.1242.

Full text

Abstract:

Background:The 1-Naphthol, one of the derivatives of naphthalene, is the most significant industrial chemical that is widely used in the production of dyes, pharmaceuticals, and biochemical processes. Methods: In the present study, N, S-doped TiO2 thin film immobilized on silica sulfuric acid (SSA) glass microspheres (MS) was investigated as a novel high efficient photocatalyst. The N, S-doped TiO2 immobilized on SSA was fabricated using a simple modified sol–gel process. Its photocatalytic activities were then assessed using 1-naphthol solution in the presence of visible light. The physico-ch

APA, Harvard, Vancouver, ISO, and other styles

15

Pathak, Sudipta, Kamalesh Debnath, and Animesh Pramanik. "Silica sulfuric acid: a reusable solid catalyst for one pot synthesis of densely substituted pyrrole-fused isocoumarins under solvent-free conditions." Beilstein Journal of Organic Chemistry 9 (November 4, 2013): 2344–53. http://dx.doi.org/10.3762/bjoc.9.269.

Full text

Abstract:

A convenient and efficient methodology for the synthesis of densely substituted pyrrole-fused isocoumarins, which employs solid-supported silica sulfuric acid (SSA) as catalyst, has been developed. When the mixture of ninhydrin adducts of acetylacetone/ethyl acetoacetate and primary amines was heated on the solid surface of SSA under solvent-free conditions, the pyrrole-fused isocoumarins were formed in good yields. This synthetic method has several advantages such as the employment of solvent-free reaction conditions without the use of any toxic reagents and metal catalysts, the ease of produ

APA, Harvard, Vancouver, ISO, and other styles

16

Bakherad, Mohammad, Ali Keivanloo, Masoumeh Siavashi, and Mina Omidian. "ChemInform Abstract: Three-Component Synthesis of Imidazo[1,2-c]pyrimidines Using Silica Sulfuric Acid (SSA)." ChemInform 45, no. 28 (2014): no. http://dx.doi.org/10.1002/chin.201428169.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Karczmarska, Agnieszka, Piotr M. Zieliński, Łukasz Laskowski, Krystian Prusik, Katarzyna Pawlik, and Magdalena Laskowska. "Mesoporous Silica-Carbon Composites with Enhanced Conductivity: Analysis of Powder and Thin Film Forms." Materials 17, no. 24 (2024): 6274. https://doi.org/10.3390/ma17246274.

Full text

Abstract:

The resistivity of the silica SBA-15 type can be significantly improved by forming a thin layer of carbon on the pore surface. This is possible through the carbonization reaction of a surfactant used as a structure-directing agent in the synthesis of mesostructured silica materials. The synthesis of this type of silica-carbon composite (SBA-C) is based on the use of sulfuric acid to create a carbon layer from surfactant molecules encapsulated in silica mesopores. The action of sulfuric acid takes place through dehydration and sulfonation reactions, which promote the formation of aromatic struc

APA, Harvard, Vancouver, ISO, and other styles

18

Wu, Hui, Yang Shen, Li-yan Fan, Yu Wan, and Da-qing Shi. "Solid silica sulfuric acid (SSA) as a novel and efficient catalyst for acetylation of aldehydes and sugars." Tetrahedron 62, no. 34 (2006): 7995–98. http://dx.doi.org/10.1016/j.tet.2006.06.038.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Rostamnia, Sadegh, and Kamran Lamei. "Diketene-based neat four-component synthesis of the dihydropyrimidinones and dihydropyridine backbones using silica sulfuric acid (SSA)." Chinese Chemical Letters 23, no. 8 (2012): 930–32. http://dx.doi.org/10.1016/j.cclet.2012.06.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Huang, Tieqiang, Danna Jiang, Jiuxi Chen, Wenxia Gao, Jinchang Ding, and Huayue Wu. "Silica Sulfuric Acid (SSA)/Polyethylene Glycol (PEG) as a Recyclable System for the Synthesis of Quinoxalines and Pyrazines." Synthetic Communications 41, no. 22 (2011): 3334–43. http://dx.doi.org/10.1080/00397911.2010.517894.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Rostamnia, Sadegh, and Kamran Lamei. "ChemInform Abstract: Diketene-Based Neat Four-Component Synthesis of the Dihydropyrimidinones and Dihydropyridine Backbones Using Silica Sulfuric Acid (SSA)." ChemInform 43, no. 49 (2012): no. http://dx.doi.org/10.1002/chin.201249170.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Huang, Tieqiang, Danna Jiang, Jiuxi Chen, Wenxia Gao, Jinchang Ding, and Huayue Wu. "ChemInform Abstract: Silica Sulfuric Acid (SSA)/Polyethylene Glycol (PEG) as a Recyclable System for the Synthesis of Quinoxalines and Pyrazines." ChemInform 43, no. 18 (2012): no. http://dx.doi.org/10.1002/chin.201218192.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Veisi, Hojat. "Silica sulfuric acid (SSA) as a solid acid heterogeneous catalyst for one-pot synthesis of substituted pyrroles under solvent-free conditions at room temperature." Tetrahedron Letters 51, no. 16 (2010): 2109–14. http://dx.doi.org/10.1016/j.tetlet.2010.02.052.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Silgado-Gómez, Kheila N., та Vladimir V. Kouznetsov. "Thermal aromatic Claisen rearrangement and Strecker reaction of alkyl(allyl)-aryl ethers under green reaction conditions: Efficient and clean preparation of ortho-allyl phenols (naphthols) and alkyl(allyl)oxyarene-based γ-amino nitriles". Mediterranean Journal of Chemistry 6, № 6 (2017): 208–14. http://dx.doi.org/10.13171/mjc65/01711201245-kouznetsov.

Full text

Abstract:

Chemical transformations of 13 diverse allyl(alkyl)-aryl ethers, easily prepared using Williamson reaction of different hydroxyarenes and allyl bromide and alkyl (n-butyl, n-octyl) bromides, were studied. Thermal aromatic Claisen rearrangement of allyl-aryl ethers to obtain ortho-allyl phenols (naphthols) employing propylene carbonate as a nontoxic and biodegradable solvent was described for the first time. The use of this green solvent allowed to enhance notably product yields and reduce significantly the reaction time comparing with the use of 1,2-dichlorobenzene, toxic solvent, which is tra

APA, Harvard, Vancouver, ISO, and other styles

25

Veisi, Hojat. "ChemInform Abstract: Silica Sulfuric Acid (SSA) as a Solid Acid Heterogeneous Catalyst for One-Pot Synthesis of Substituted Pyrroles under Solvent-Free Conditions at Room Temperature." ChemInform 41, no. 32 (2010): no. http://dx.doi.org/10.1002/chin.201032117.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Rad, Mohammad Navid Soltani, Ali Khalafi-Nezhad, Masoumeh Divar, and Somayeh Behrouz. "Silica Sulfuric Acid (SSA) as a Highly Efficient Heterogeneous Catalyst for Persilylation of Purine and Pyrimidine Nucleobases and Other N-Heterocycles Using Hmds." Phosphorus, Sulfur, and Silicon and the Related Elements 185, no. 9 (2010): 1943–54. http://dx.doi.org/10.1080/10426500903383952.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Stockton, Jon D., Joseph F. Lomax, Charles A. Edmondson, John J. Fontanella, and Mary C. Wintersgill. "Studies in Mesoporous Silicates: Impedance Measurements on SBA-15 Loaded with Sulfonated-Polystyrene and Nafion with SBA-15 Filler." Advances in Science and Technology 45 (October 2006): 2033–38. http://dx.doi.org/10.4028/www.scientific.net/ast.45.2033.

Full text

Abstract:

An organic-inorganic composite was formed by cross-linking polystyrene (PS) into a SBA-15-type mesoporous silica (SBA/PS). The SBA-15/PS reacted with sulfuric acid according to published methods to sulfonate the benzene rings of the styrene (SBA-15/PS/SO3). These two latter solids were investigated by TGA/MS to determine stability and decomposition mechanisms. Complex impedance measurements at 10-105 Hz were taken on (SBA-15/PS/SO3) and Nafion cast films loaded with SBA-15 at a level of 1-10%, and similar films with SBA-15/PS/SO3 in hopes that the mesoporous solids might impart desirable prope

APA, Harvard, Vancouver, ISO, and other styles

28

Kuvshinov, Grigoriy V., Tatyana M. Ziyadova, Sofya A. Kuvshinova, and Oscar I. Koifman. "SYNTHESIS AND OPTICAL PROPERTIES OF CAMPHOR-SABSTITUTED TETRAPYRAZINOPORPHYRAZINES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 4 (2017): 60. http://dx.doi.org/10.6060/tcct.2017604.5505.

Full text

Abstract:

The synthesis of the complexes of Cu, Ni, Co, Pd, Sn, Hg of 1',7',7'-trimethylbicyclo[2.2.1]heptano-[2',3'-b]-2,3-pyrazinoporphyrazine for new materials for variety of potential applications is described. Metallic complexes were synthesized by the template cyclotetramerization of dicarbonitrile with metal chlorides at temperature 140-150 ºС for 20 min. Ammonium molybdate tetrahydrate was used as a catalyst. The products were purificated by chromatography on silica gel (eluent -chloroform). Complexes of Pd, Sn and Hg were synthesized for the first time. The metallocomplexes of camphor-substitut

APA, Harvard, Vancouver, ISO, and other styles

29

Li, Feng, Xiang Dong Liu, and Yuan He Guo. "Process Investigation for Purifying Hydrated Silica from Fly Ash by Acid and Alkali Combination Method." Advanced Materials Research 97-101 (March 2010): 1170–73. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.1170.

Full text

Abstract:

In this paper, with sodium carbonate as an auxiliary agent in the fly ash, the mixtures were sintered at 880°C for 90 min, then dissolved by different concentrations of sulfuric acid respectively for extracting the hydrated silica. The results show that when the activated ash fly is dissolved by different concentrations of sulfuric acid, the dissolution rates of ash fly increase with the concentration of sulfuric acid increasing. Impurities of aluminum and iron atoms are present in an orderly array of micro-andalusite structure in the generative hydrated silica. When they are dissolved by sulf

APA, Harvard, Vancouver, ISO, and other styles

30

Zhao, Dandan, Jinjin Qian, Yaxu Wang, Zichuan Ma, and Xiaolong Ma. "Reactive Adsorption of Gaseous Anisole by MCM–41-Supported Sulfuric Acid." Catalysts 12, no. 9 (2022): 942. http://dx.doi.org/10.3390/catal12090942.

Full text

Abstract:

To achieve the efficient resource treatment of aromatic volatile organic compounds (VOCs) of high toxicity, this work chose anisole as a representative pollutant and investigated its removal by an MCM–41-supported sulfuric acid (SSA/MCM–41) adsorbent. The results indicate that the SSA/MCM–41 adsorbent exhibited a reactive temperature range of 110–140 °C, in which the anisole removal ratio (Xa) was greater than 95%. The collected breakthrough adsorption data fit the dose–response model. In the comprehensive analysis of the process conditions, reducing the flow rate enhanced the theoretical brea

APA, Harvard, Vancouver, ISO, and other styles

31

Sadeghi, Bahareh, Alireza Hassanabadi, and Somayeh Bidaki. "Synthesis of Nanoparticles Silica Supported Sulfuric Acid." Journal of Chemical Research 35, no. 11 (2011): 666–68. http://dx.doi.org/10.3184/174751911x13202541174086.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Ravi, P., Girish M. Gore, Arun K. Sikder, and Surya P. Tewari. "Silica–Sulfuric Acid Catalyzed Nitrodeiodination of Iodopyrazoles." Synthetic Communications 42, no. 23 (2012): 3463–71. http://dx.doi.org/10.1080/00397911.2011.584261.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Villefort, Regina F., Lilian C. Anami, Tiago M. B. Campos, et al. "Influence of Alternative and Conventional Surface Treatments on the Bonding Mechanism between PEEK and Veneering Resin for Dental Application." Coatings 11, no. 6 (2021): 719. http://dx.doi.org/10.3390/coatings11060719.

Full text

Abstract:

This study evaluated the influence of conventional and alternative surface treatments on wettability and the bond strength between polyether ether ketone (PEEK) and veneering resin. PEEK samples were randomly divided into five groups: sandblasting, tribochemical silica coating, etching with 98% sulfuric acid for 5 s, etching with 98% sulfuric acid for 30 s, and tribochemical silica coating plus heated silane. One of them was subjected to analysis by energy-dispersive X-ray spectroscopy (EDS) and ten were analyzed by goniometry (n = 5) and scanning electron microscopy (n = 5). Shear bond streng

APA, Harvard, Vancouver, ISO, and other styles

34

Zhao, Dandan, Yuheng Liu, Xiaolong Ma, Jinjin Qian, and Zichuan Ma. "Reactive Adsorption Performance and Behavior of Gaseous Cumene on MCM-41 Supported Sulfuric Acid." Molecules 27, no. 16 (2022): 5129. http://dx.doi.org/10.3390/molecules27165129.

Full text

Abstract:

Efficient removal of cumene from gaseous streams and recovery of its derivatives was accomplished using a MCM-41-supported sulfuric acid (SSA/MCM-41) adsorbent. The results indicated that the removal performance of the SSA/MCM-41 for cumene was significantly influenced by the process conditions such as bed temperature, inlet concentration, bed height, and flow rate. The dose–response model could perfectly describe the collected breakthrough adsorption data. The SSA/MCM-41 adsorbent exhibited a reactive temperature region of 120–170 °C, in which the cumene removal ratios (Xc) were greater than

APA, Harvard, Vancouver, ISO, and other styles

35

Sulistiyono, Eko, Murni Handayani, Agus Budi Prasetyo, et al. "Implementation of sulfuric acid leaching for aluminum and iron removal for improvement of low-grade silica from quartz sand of Sukabumi, Indonesia." Eastern-European Journal of Enterprise Technologies 3, no. 6 (111) (2021): 32–40. http://dx.doi.org/10.15587/1729-4061.2021.226267.

Full text

Abstract:

Indonesia has very abundant reserves of silica, but progressive studies on the deposition of this material are very few, resulting in limited applications of silica. This work refers to the purification of silica from quartz sand originated from Sukabumi, Indonesia to obtain high-purity silica, which can be applied as important raw materials for special purposes. The aim of our research is to improve low-grade silica from quartz sand by removing impurities, especially aluminum and iron removal, using sulfuric acid leaching. In order to achieve the aim, the effect of reaction time and sulfuric

APA, Harvard, Vancouver, ISO, and other styles

36

Eko, Sulistiyono, Handayani Murni, Budi Prasetyo Agus, et al. "Implementation of sulfuric acid leaching for aluminum and iron removal for improvement of low-grade silica from quartz sand of Sukabumi, Indonesia." Eastern-European Journal of Enterprise Technologies 3, no. 6 (111) (2021): 32–40. https://doi.org/10.15587/1729-4061.2021.226267.

Full text

Abstract:

Indonesia has very abundant reserves of silica, but progressive studies on the deposition of this material are very few, resulting in limited applications of silica. This work refers to the purification of silica from quartz sand originated from Sukabumi, Indonesia to obtain high-purity silica, which can be applied as important raw materials for special purposes. The aim of our research is to improve low-grade silica from quartz sand by removing impurities, especially aluminum and iron removal, using sulfuric acid leaching. In order to achieve the aim, the effect of reaction time and sulfuric

APA, Harvard, Vancouver, ISO, and other styles

37

Goda, Hiroki, Koji Harada, Shunji Tsugo, and Makoto Hibino. "Strength and Sulfuric Acid Resistance of Three Component Geopolymer." Advanced Materials Research 1129 (November 2015): 607–13. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.607.

Full text

Abstract:

The compressive strength and resistance to chemical attack of a fly-ash-based geopolymer, to which ground granulated blast furnace slag (B.F.S) and silica fume were added as mineral admixtures, were evaluated. The B.F.S. constituted 10% of the total powder amount in this geopolymer, which exhibited a high compressive strength. In addition, the compressive strength remained unchanged with proportional additions of silica fume to the mixture. The geopolymer exhibited, however, different resistance to sulfuric acid and sodium sulfate solutions during diffusion testing. In fact, the resistance of

APA, Harvard, Vancouver, ISO, and other styles

38

Chávez, Flavio, Silvia Suárez, and Miguel A. Díaz. "Sulfuric Acid Adsorbed on Silica Gel. A Multipurpose Acid Catalyst." Synthetic Communications 24, no. 16 (1994): 2325–39. http://dx.doi.org/10.1080/00397919408019058.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

S., Durgasravanthi, and Krishna Kumar M. "Study of Concrete Properties under Acid Attacks." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 627–30. https://doi.org/10.5281/zenodo.3590893.

Full text

Abstract:

Acidic attack on concrete imparts a unique set of damage mechanisms and manifestations compared to other durability issues of concrete. Sulfuric acid attack limits the service life of concrete elements and, thus, results in increased expenditures for the repair or in some cases replacement of the whole structure. To date, there is lack of standardized tests for specifically evaluating the resistance of concrete to sulfuric acid attack, which has caused great variability, for example in terms of solution concentration, pH level control, etc., among previous studies in this area. Accordingly, th

APA, Harvard, Vancouver, ISO, and other styles

40

Min, Hong Guang, Zhi Gang Song, Yan Tao Li, and Yi Jie Shen. "Influence of Fly Ash and Silica Fume on Anti-Corrosion Characteristics of Mortar in Sulfuric Acid." Advanced Materials Research 261-263 (May 2011): 306–12. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.306.

Full text

Abstract:

A long term immersion test of mortar in sulfuric acid is carried out to investigate the effects of fly ash (FA) and silica fume (SF) on anti-corrosion characteristics. The mortar specimens have water to binder ratios (W/B) ranging from 0.5 to 0.7 and are divided into two series. Series one uses admixture of FA with replacement ratio from 0~0.3 and series two uses admixture of SF with replacement ratio from 0~0.1. The specimens are soaked in sulfuric acid with a pH value of 3.50 for 150 days. The portable pH meter is used to monitor the pH changing of the soak solution. The titrating sulfuric a

APA, Harvard, Vancouver, ISO, and other styles

41

Vekariya, Rajesh H., and Hitesh D. Patel. "Cellulose sulfuric acid (CSA) and starch sulfuric acid (SSA) as solid and heterogeneous catalysts in green organic synthesis: recent advances." Arkivoc 2015, no. 1 (2015): 136–59. http://dx.doi.org/10.3998/ark.5550190.p008.975.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Salehi, Peyman, Mohammad Ali Zolfigol, Farhad Shirini, and Mostafa Baghbanzadeh. "Silica Sulfuric Acid and Silica Chloride as Efficient Reagents for Organic Reactions." Current Organic Chemistry 10, no. 17 (2006): 2171–89. http://dx.doi.org/10.2174/138527206778742650.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Wang, Hong Zhen, Chuan Shan Zhao, and Shu Hui Yu. "The Study of a Kind of New Synthetic Paper Coating Thickness Agent." Advanced Materials Research 236-238 (May 2011): 1256–60. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.1256.

Full text

Abstract:

In this paper, Water glass and sulfuric acid were used as raw materials to do the synthesis of hydrated silica by the method of precipitation, and then hydrated silica is applied in paper coating. By examining the changes of the coated paper’s various properties to study the effects of different reaction conditions to the final products. And then we obtained a optimal synthesis conditions: sulfuric acid concentration 25%, reaction time 50min, reaction temperature 80°C, sodium silicate modulus 2.8, stirring speed 150r/min, the relative amount of sodium sulfate content compared to SiO2 is 25% .A

APA, Harvard, Vancouver, ISO, and other styles

44

Zhaoa, Ling-ling, Yu Wan, Shu-ying Huang, et al. "Silica Sulfuric Acid-Catalyzed Syntheses of Calix[4] Resorcinarenes." Letters in Organic Chemistry 10, no. 4 (2013): 298–301. http://dx.doi.org/10.2174/1570178611310040012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Ravi, P., Girish M. Gore, Arun K. Sikder, and Surya P. Tewari. "ChemInform Abstract: Silica-Sulfuric Acid Catalyzed Nitrodeiodination of Iodopyrazoles." ChemInform 44, no. 5 (2013): no. http://dx.doi.org/10.1002/chin.201305088.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Suryadi, Joko, Nanda Nabila, Syafa Neiska Bayhaqi, and Eko Andrijanto. "Pengaruh Temperatur Kalsinasi Terhadap Kapasitas Ion Katalis Asam Heterogen Berbasis Silika dan Aplikasinya pada Sintesis Metil Oleat." KOVALEN: Jurnal Riset Kimia 9, no. 2 (2023): 122–31. http://dx.doi.org/10.22487/kovalen.2023.v9.i2.16457.

Full text

Abstract:

Sulfated silica catalyst is a solid acid catalyst which in its application is used to accelerate esterification reactions. The purpose of this study was to determine the effect of calcination temperature and increasing the amount of catalyst on the effectiveness of silica as a catalyst in the formation of methyl oleate through esterification reactions. The synthesis of sulfuric acid catalyst from rice husk ash went through several stages, including preparation of raw material for rice husk ash, production of silica using the sol-gel method, manufacture of silica-based acid catalysts and charac

APA, Harvard, Vancouver, ISO, and other styles

47

Yang, Hao-Dong, Jun-Hao Huang, Kengo Shibata, Daling Lu, Kazuhiko Maeda, and Chechia Hu. "Boosting photocatalytic H2O2 production by coupling of sulfuric acid and 5-sulfosalicylic acid incorporated polyaniline with g-C3N4." Sustainable Energy & Fuels 4, no. 8 (2020): 4186–95. http://dx.doi.org/10.1039/d0se00337a.

Full text

Abstract:

In this study, graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>, CN) was decorated with polyaniline (PANI), which was incorporated with inorganic (H<sub>2</sub>SO<sub>4</sub>) and organic (5-sulfosalicylic acid, SSA) acids for photocatalytic H<sub>2</sub>O<sub>2</sub> production under simulated solar irradiation.

APA, Harvard, Vancouver, ISO, and other styles

48

Vogt, Oliver, Neven Ukrainczyk, and Eddie Koenders. "Effect of Silica Fume on Metakaolin Geopolymers’ Sulfuric Acid Resistance." Materials 14, no. 18 (2021): 5396. http://dx.doi.org/10.3390/ma14185396.

Full text

Abstract:

To demonstrate the importance of the Si/Al ratio in terms of geopolymer mix designs for acid resistance, a metakaolin-based geopolymer was modified by replacing the aforementioned precursor with different percentages of silica fume. Durability tests were performed by exposing geopolymers with varying amounts of silica fume (up to 9%) to sulfuric acid solution (pH 1) over a period of 84 days. Geopolymer samples were analyzed by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX) before and a

APA, Harvard, Vancouver, ISO, and other styles

49

Shelar, Santosh V., and Narshinha P. Argade. "Regioselective oxidation of indoles to 2-oxindoles." Organic & Biomolecular Chemistry 17, no. 27 (2019): 6671–77. http://dx.doi.org/10.1039/c9ob00764d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Kondo, Takeshi. "(Invited) Electrolytic Application of Boron-Doped Diamond Powders." ECS Meeting Abstracts MA2024-02, no. 58 (2024): 3913. https://doi.org/10.1149/ma2024-02583913mtgabs.

Full text

Abstract:

Boron-doped diamond (BDD) electrodes or diamond electrodes are known to be useful for a durable electrode for electrolysis with a high efficiency base on their wide potential window and physical and chemical stabilities. As a result of electrolysis of concentrated sulfuric acid at diamond electrode, reactive oxidizing species, such as peroxodisulfate, peroxomonosulfate, and hydrogen peroxide, can be generated at a high current efficiency. Such electrolyzed sulfuric acid exhibits strong oxidizing power, and is used for mineralization of organic compounds. Carbon fiber reinforced plastics (CFRP)

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!