排序方式: 共有40条查询结果,搜索用时 15 毫秒
1.
Yu. A. Zakhodyaeva A. A. Voshkin V. V. Belova A. I. Khol’kin 《Theoretical Foundations of Chemical Engineering》2012,46(4):413-418
The laws of the interphase distribution of saturated monocarboxylic acids in the system with the binary extracanttrioctylmethylammonium di(2-ethylhexyl)phosphate were studied. The extraction isoherms of monocarboxylic acids by 0.2 M solution of trioctylmethylammonium di(2-ethylhexyl)phosphate in toluene were obtained, and it was shown that they are rectilinear. The extractibility of acids decreases in the following order: butyric > propionic > formic> acetic> lactic, which corresponds to the anion-exchange order for the initial salts of quaternary ammonium bases. The mechanisms of the distribution of monocarboxylic acids were proposed. The study of the extraction of acetic and propionic acids as a function of the acidity of the aqueous phase revealed that the acids are extracted most efficiently from acid solutions. A decrease in the distribution coefficients with an increasing pH of the aqueous phase is observed, which indicates the possibility of efficient reextraction of monocarboxylic acids from organic solutions. 相似文献
2.
Fedorova M. I. Zinov’eva I. V. Zakhodyaeva Yu. A. Voshkin A. A. 《Theoretical Foundations of Chemical Engineering》2020,54(2):313-318
Theoretical Foundations of Chemical Engineering - An environmentally friendly solvent, namely, polypropylene glycol 425, has been proposed for the extraction of metal ions from chloride solutions... 相似文献
3.
Yu. A. Zakhodyayeva A. A. Voshkin V. V. Belova A. E. Kostanyan A. I. Khol’kin 《Theoretical Foundations of Chemical Engineering》2010,44(5):782-785
The extraction of lactic acid from technological solutions by different extracting agents and their mixtures was studied. It was established that the most effective extraction of lactic acid is reached in systems with mixtures of trioctylamine and tributyl phosphate. The reextraction of lactic acid from the organic phase is performed by water. 相似文献
4.
Zinov’eva I. V. Kozhevnikova A. V. Milevskii N. A. Zakhodyaeva Yu. A. Voshkin A. A. 《Theoretical Foundations of Chemical Engineering》2022,56(2):221-229
Theoretical Foundations of Chemical Engineering - A new hydrophobic deep eutectic solvent (HDES) based on di(2-ethylhexyl)phosphoric acid and menthol has been proposed for the extraction of... 相似文献
5.
Zinov’eva I. V. Fedorov A. Ya. Milevskii N. A. Zakhodyaeva Yu. A. Voshkin A. A. 《Theoretical Foundations of Chemical Engineering》2021,55(4):663-670
Theoretical Foundations of Chemical Engineering - A choline chloride–sulfosalicylic acid deep eutectic solvent (DES) is proposed for dissolving the oxides Co(II), Cu(II), Zn(II), Fe(III),... 相似文献
6.
Zakhodyaeva Yu. A. Rudakov D. G. Solov’ev V. O. Voshkin A. A. Timoshenko A. V. 《Theoretical Foundations of Chemical Engineering》2019,53(2):159-165
Theoretical Foundations of Chemical Engineering - Liquid–liquid phase equilibrium for a new extraction system based on polyvinylpyrrolidone-3500 and sodium nitrate at 298.15, 313.15, and... 相似文献
7.
This article considers new methods of liquid-liquid chromatography with one phase retained in a free state in a spiral column during the second phase pumping through it by imparting liquids with alternate motion. At that, compared with the known methods, the instrumentation of extraction-chromatographic separation of the components mixture becomes much easier and less expensive. The retention of the stationary phase in a spiral pulsation-chromatography column has been experimentally investigated. The results of experiments and calculations prove the prospectiveness of pulsation-cyclic liquid chromatography. 相似文献
8.
N. S. Egorova V. V. Belova A. A. Voshkin A. I. Khol’kin A. K. Pyartman V. A. Keskinov 《Theoretical Foundations of Chemical Engineering》2008,42(5):708-713
The extraction of uranyl nitrate with methyltrioctylammomium di(2,4,4-trimethylpentyl)phosphinate is compared to uranyl nitrate extraction with constituent cation-and anion-exchange extracting agents at various compositions of aqueous and organic phases. In UO2(NO3)2 extraction with quaternary ammonium nitrate and dialkylphosphinic acid solutions in toluene, the compounds (R4N)2UO2(NO3)4 and UO2A2, respectively, are formed in the organic phase. The binary extraction of uranyl nitrate is characterized by larger distribution ratios than extraction with the initial quaternary ammonium nitrate. Under saturation conditions, the capacity of the binary extractant is two times higher than the capacity of the anion-exchange extractant at the same concentration. Uranyl nitrate extraction with a binary extractant can yield, in the organic phase, complexes in which the uranyl ion either forms a salt with the anion of the organic acid or is incorporated into an extractable complex anion, depending on its thermodynamic stability in the heterogeneous system. 相似文献
9.
Gradov O. M. Voshkin A. A. Zakhodyaeva Yu. A. 《Theoretical Foundations of Chemical Engineering》2017,51(5):876-882
Theoretical Foundations of Chemical Engineering - The conditions for the existence of an acoustic flow effect excited in a cylindrical liquid volume by the radial oscillations of its walls within... 相似文献
10.
Milevsky N. A. Zinovieva I. V. Zakhodyaeva Yu. A. Voshkin A. A. 《Theoretical Foundations of Chemical Engineering》2022,56(1):45-52
Theoretical Foundations of Chemical Engineering - This paper presents the results of a study of the physical properties of a hydrophobic deep eutectic solvent (HDES) based on Aliquat 336 and... 相似文献