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Artykuły w czasopismach na temat „Alkaline solvolysis”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Sprawdź 27 najlepszych artykułów w czasopismach naukowych na temat „Alkaline solvolysis”.

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1

Kašpárek, František, Kamila Vavčíková, Jiří Mollin, and Aleš Husek. "Steric effects in alkaline solvolysis of diaryl anilidophosphates." Collection of Czechoslovak Chemical Communications 55, no. 7 (1990): 1769–76. http://dx.doi.org/10.1135/cccc19901769.

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Analysis of the products of solvolysis of aryl esters of anilidophosphoric acids in water-2-propanol mixture excludes that the reaction proceeds via E1cB mechanism. Analysis of the reaction products of solvolysis of methyl-substituted compounds made it possible to evaluate the importance of the reported steric hindrance by CH3 group. The dependence of rate constants of the solvolysis on solvent system has been established.

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2

Mollin, Jiří, Pavlína Staňková, and Oldřiška Staňková. "The evidence and applications of equilibria between hydroxide and alkoxide ions in aqueous-alcoholic systems." Collection of Czechoslovak Chemical Communications 55, no. 11 (1990): 2614–23. http://dx.doi.org/10.1135/cccc19902614.

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The composition of solvolysis products of butyl bromide, acetanhydride, and benzoyl chloride has been followed aqueous alcohol in alkaline and (except for butyl bromide) also in neutral regions. The results have been used as a piece of evidence of the existence of equilibrium between hydroxide and alkoxide ions and for evaluation of the possibility of calculation of the concentration ratio of hydroxide and alkoxide ions from the concentration ratios of the products as well as for evaluation of selectivities of the solvolytic reactions for mechanistic purposes.

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3

Bloomfield, Aaron J., Subhajyoti Chaudhuri, Brandon Q. Mercado, Victor S. Batista, and Robert H. Crabtree. "Facile solvolysis of a surprisingly twisted tertiary amide." New Journal of Chemistry 40, no. 3 (2016): 1974–81. http://dx.doi.org/10.1039/c5nj02449h.

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4

O., Sanda, A. Taiwo E., and A. Osinkolu G. "Alkaline Solvolysis of Poly(Ethylene Terephthalate) in Butan–1–ol Media: Kinetics and Optimization Studies." British Journal of Applied Science & Technology 21, no. 5 (2017): 1–12. https://doi.org/10.9734/BJAST/2017/32597.

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This study was carried out to examine the thermo-chemical decomposition of postconsumer poly(ethylene terephthalate) (PET) in alkaline solution of butan-1-ol. The effect of various process parameters such as reactor temperature, time and sodium hydroxide concentration on the degree of PET degradation and products yield were studied and it was found that the decomposition of PET was essentially complete in an hour, with terephthalic acid and ethylene glycol being the main products. A kinetic study of the process showed that the alkaline solvolysis of PET is a second order reaction.

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5

Tondeur, J. J., A. Borghese, and G. Vandendunghen. "Alkaline solvolysis of triphenylsilane, part 3. Activation parameters in water/acetonitrile mixtures." Reaction Kinetics & Catalysis Letters 49, no. 2 (1993): 241–49. http://dx.doi.org/10.1007/bf02067688.

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6

Mollin, Jiří, Zdeněk Pavelek, and František Kašpárek. "Ratio of lyate ions activities in two-components protogenic solvents." Collection of Czechoslovak Chemical Communications 52, no. 5 (1987): 1115–30. http://dx.doi.org/10.1135/cccc19871115.

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Kinetic method for the evaluation of lyate ions activities in two-component protogenic solvents has been discussed. Spectral methods for the measurement of equilibria between alkoxide and hydroxide ions have been compared. A correlation between dissociation constants of water and of weak organic acids in solvent mixtures has been found. By means of this correlation, ratios of lyate ions activities in water-ethanol and water-2-propanol mixtures have been calculated. These activity ratios, together with the known composition of reaction products, have been used to evaluate the selectivity of the

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7

Sanda, O., E. Taiwo, and G. Osinkolu. "Alkaline Solvolysis of Poly(Ethylene Terephthalate) in Butan–1–ol Media: Kinetics and Optimization Studies." British Journal of Applied Science & Technology 21, no. 5 (2017): 1–12. http://dx.doi.org/10.9734/bjast/2017/32597.

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8

Sanda, O., E. Taiwo, M. Akinrinsola, and G. Osinkolu. "A Study of the Alkaline Solvolysis of Postconsumer Polyethylene Terephthalate in Primary C1 – C3 Aliphatic Alcohols." American Chemical Science Journal 16, no. 1 (2016): 1–14. http://dx.doi.org/10.9734/acsj/2016/27697.

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9

Takada, Masatsugu, Yoshiki Tanaka, Eiji Minami, and Shiro Saka. "Comparative study of the topochemistry on delignification of Japanese beech (Fagus crenata) in subcritical phenol and subcritical water." Holzforschung 70, no. 11 (2016): 1047–53. http://dx.doi.org/10.1515/hf-2016-0033.

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Abstract The delignification of Japanese beech (Fagus crenata) has been evaluated under conditions of subcritical phenol (230°C/1.2 MPa) and subcritical water (230°C/2.9 MPa). In the former, more than 90% of the original lignin was decomposed and removed, while in subcritical water, around half of the original lignin was left as insoluble residue. Ultraviolet (UV) microscopic images of the insoluble residues showed that the lignin in the secondary walls is decomposed and removed under both conditions. These images also revealed that the lignin in the compound middle lamella (CML) is resistant

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10

Thiare, Diène Diègane, Abdourakhmane Khonté, Diegane Sarr, et al. "Solvolysis kinetic study and direct spectrofluorimetric analysis of the fungicide benomyl in natural waters." Macedonian Journal of Chemistry and Chemical Engineering 33, no. 2 (2014): 237. http://dx.doi.org/10.20450/mjcce.2014.513.

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<p>A direct spectrofluorimetric method for the quantitative analysis of benomyl in natural waters is described. Benomyl is an instable, fluorescent fungicide that mainly decomposes into carbendazim and n-butyl-isocyanate in organic and aqueous solutions. The kinetics of benomyl solvolysis reactions were investigated in organic solvents (methanol and acetonitrile) and in aqueous solvent systems, including β–cyclodextrin (β-CD), sodium dodecyl sulfate (SDS), dodecyltrimethylammonium chloride (DTAC), cetyltrimethylammonium chloride (CTAC), cetyltrimethylammonium hydroxide (CTAOH), Brij-700,

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11

Skarga, Vladislav V., Anton A. Matrosov, Artemiy I. Nichugovskiy, et al. "pH-Dependent Photoinduced Interconversion of Furocoumaric and Furocoumarinic Acids." Molecules 26, no. 9 (2021): 2800. http://dx.doi.org/10.3390/molecules26092800.

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Photo-controlled or photo-regulated molecules, especially biologically active and operating in physiological conditions, are in steady demand. Herein, furocoumaric and furocoumarinic acids being (Z/E)-isomers relative to each other were obtained in two stages starting from psoralen: the alkaline solvolysis of psoralen led to furocoumaric acid, which was further Z → E photoisomerized (365 nm) to furocoumarinic acid. The kinetics of Z → E photoisomerization was monitored by HPLC and UV-vis spectrophotometry. Photophysical characteristics in the aqueous phase for both acids, as well as the revers

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12

SHAVRIN, K. N., I. V. KRYLOVA, I. E. DOLGII, and O. M. NEFEDOV. "ChemInform Abstract: Alkynylhalocarbenes. Part 2. Generation of (1-Alkynyl)chlorocarbenes by Alkaline Solvolysis of 1,1-Dichloro-2-alkynes (I) and Their Reaction with Olefins (II): Synthesis of 1-Chloro-1- alkynylcyclopropanes (III)." ChemInform 25, no. 13 (2010): no. http://dx.doi.org/10.1002/chin.199413131.

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13

J., M. JESSY. "Solvent Steric Effect and its Correlation with a Function of Solvent Mass." Journal of Indian Chemical Society Vol. 64, Feb 1987 (1987): 126–27. https://doi.org/10.5281/zenodo.6216492.

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Department of Chemistry, Calicut University, Calicut-673 635 <em>Manuscript received 19 July 1985, revised 21 October 1986, accepted 3 January 1987</em> Solvent Steric Effect and its Correlation with a Function of Solvent Mass     

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14

Thring, Ronald W., Esteban Chornet, Jean Bouchard, Pierre F. Vidal, and Ralph P. Overend. "Characterization of lignin residues derived from the alkaline hydrolysis of glycol lignin." Canadian Journal of Chemistry 68, no. 1 (1990): 82–89. http://dx.doi.org/10.1139/v90-017.

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Lignin residues from the alkaline hydrolysis of solvolytic lignin have been characterized by elemental analysis, size exclusion chromatography, Fourier transform infrared spectroscopy, 13C NMR, and for methoxyl content. All lignin residues were found to have higher carbon and lower oxygen contents than the original glycol lignin. Methoxyl contents decreased with increasing severity of treatment. All treated lignins have lower molecular weights than the original, which is indicative of the extensive depolymerization of glycol lignin by alkaline hydrolysis. The appearance of new bands in the 305

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15

García-Río, Luis. "Preface." Pure and Applied Chemistry 81, no. 4 (2009): iv. http://dx.doi.org/10.1351/pac20098104iv.

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The 19th IUPAC Conference on Physical Organic Chemistry (ICPOC-19) was held at the University of Santiago de Compostela, Santiago, Spain, 13-18 July 2008 under the local auspices of the Universities of Santiago, A Coruña, and Vigo. About 400 delegates attended ICPOC-19 from 39 countries, to participate in a scientific program comprising 11 plenary lectures, 22 invited lectures, 102 oral communications, and 224 posters.Physical organic chemistry, the study of the interrelationships between structure and reactivity in organic molecules, is a relatively young subfield of organic chemistry. At the

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16

Ramopoulos, Vasileios, Guido Link, Sergey Soldatov, and John Jelonnek. "Industrial scale microwave applicator for high temperature alkaline hydrolysis of PET." International Journal of Microwave and Wireless Technologies 10, no. 5-6 (2018): 709–16. http://dx.doi.org/10.1017/s1759078718000727.

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AbstractA microwave design for an industrial scale applicator of a continuous microwave assisted depolymerization of polyethylene terephthalate (PET) has been developed. The cavity is designed for use in combination with an Archimedean screw pump to transport the reaction material, surrounded by a cylindrical pipe with a diameter of 250 mm and a length of 250 mm at the 2.45 GHz ISM band. The proposed design is modular and can be easily expanded for the heating of longer reactor tubes. Simulation results show that a homogeneous heating of the process material along the screw axis can be achieve

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17

Lehikoinen, Pertti, Jorma Mattinen, and Harri Lonnberg. "Mechanisms for the solvolytic decompositions of nucleoside analogs. 13. Reactions of adenine nucleosides with aqueous alkalies: kinetics and mechanism." Journal of Organic Chemistry 51, no. 20 (1986): 3819–23. http://dx.doi.org/10.1021/jo00370a013.

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18

Sanda, O., E. O. Ehinmitola, A. Y. Kolapo, and E. A. Taiwo. "Effect of Flake Pigmentation on the Microwave-Assisted Alkaline Solvolysis of Postconsumer Polyethylene Terephthalate in Primary C1 – C3 Aliphatic Alcohols." Chemical Science International Journal, March 14, 2019, 1–12. http://dx.doi.org/10.9734/csji/2019/v26i130082.

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This study was carried out to examine the alkaline solvolysis of pigmented postconsumer polyethylene terephthalate (PET) in solutions of C1 – C3 primary alcohols via microwave heating. The effect of various process parameters such as flake pigmentation, time and sodium hydroxide concentration on the degree of PET degradation and product yield were studied for each alcohol. Response surface methodology (RSM) was used for predicting the optimal conditions for alkaline solvolysis of PET scrap, with Central Composite Design (CCD) for the two parameters chosen as the experimental design. The data o

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19

Крутов, С. М., Е. В. Ипатова, Д. С. Косяков, and Н. В. Ульяновский. "ESI-MS analysis of hydrolysis lignin alkaline destruction products." Известия СПбЛТА, no. 218(218) (March 20, 2017). http://dx.doi.org/10.21266/2079-4304.2017.218.211-222.

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Показано, что щелочной сольволиз технического гидролизного лигнина при 220 °С приводит к его полному переходу в водорастворимое состояние, что связано с процессом его глубокой деструкции. Чтобы оценить характер образующихся продуктов деструкции лигнина, использовали методы времяпролетной масс-спектрометрии с ионизацией в заряженных электрических полях в положительном и отрицательном режимах. Представлены результаты исследования продуктов щелочной деструкции технического гидролизного лигнина Кировского БиоХимЗавода. Проведен щелочной сольволиз гидролизного лигнина при температуре 220 °С, 5% NaO

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20

Sanda, O., O. Y. Tindehuto, T. A. Oreofe, B. S. Fakinle, and E. A. Taiwo. "Microwave - Assisted alkaline solvolysis of pigmented polyethylene terephthalate flakes in glycerol media." Case Studies in Chemical and Environmental Engineering, May 2023, 100383. http://dx.doi.org/10.1016/j.cscee.2023.100383.

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21

LOENNBERG, H., J. LUKKARI, and P. LEHIKOINEN. "ChemInform Abstract: Mechanisms for the Solvolytic Decompositions of Nucleoside Analogues. Part 12. Further Studies on the Alkaline Hydrolysis of 9-(1-Alkoxyethyl)purines." Chemischer Informationsdienst 16, no. 8 (1985). http://dx.doi.org/10.1002/chin.198508095.

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22

LOENNBERG, H., and J. YLIKOSKI. "ChemInform Abstract: Mechanisms for the Solvolytic Decompositions of Nucleoside Analogues. Part 14. Effect of Base-stacking on the Alkaline Cleavage of 9-(1-Ethoxyethyl)purine." Chemischer Informationsdienst 16, no. 41 (1985). http://dx.doi.org/10.1002/chin.198541077.

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23

LOENNBERG, H., P. SUOKAS, R. KAEPPI, and E. DARZYNKIEWICZ. "ChemInform Abstract: Mechanisms for the Solvolytic Decompositions of Nucleoside Analogues. Part 17. Reactions of Pyrimidine Nucleosides with Aqueous Alkalies: Kinetics and Mechanisms." ChemInform 18, no. 22 (1987). http://dx.doi.org/10.1002/chin.198722298.

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24

LEHIKOINEN, P., J. MATTINEN, and H. LOENNBERG. "ChemInform Abstract: Mechanisms for the Solvolytic Decompositions of Nucleoside Analogues. Part B. Reactions of Adenine Nucleosides with Aqueous Alkalies: Kinetics and Mechanism." ChemInform 18, no. 12 (1987). http://dx.doi.org/10.1002/chin.198712362.

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25

LOENNBERG, H., та P. LEHIKOINEN. "ChemInform Abstract: MECHANISMS FOR THE SOLVOLYTIC DECOMPOSITIONS OF NUCLEOSIDE ANALOGS. XIII. REACTION OF 9-(β-D-RIBOFURANOSYL)PURINE WITH ALKALIES: KINETICS AND MECHANISM". Chemischer Informationsdienst 16, № 19 (1985). http://dx.doi.org/10.1002/chin.198519330.

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26

KAEPPI, R., and H. LOENNBERG. "ChemInform Abstract: Mechanisms for the Solvolytic Decompositions of Nucleoside Analogues. Part 19. Reactions of 5-Bromo Substituted Pyrimidine Nucleosides with Aqueous Alkalies: Kinetics and Mechanisms." ChemInform 18, no. 16 (1987). http://dx.doi.org/10.1002/chin.198716093.

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27

LOENNBERG, H., R. KAEPPI, P. LEHIKOINEN, and M. OIVANEN. "ChemInform Abstract: Mechanisms for the Solvolytic Decompositions of Nucleoside Analogues. Part 20. Kinetics of the Multistage Reactions of 6-Substituted Purine Nucleosides with Aqueous Alkalies." ChemInform 18, no. 29 (1987). http://dx.doi.org/10.1002/chin.198729069.

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