Еquilibria in the system of tetra-n-octylamide of diglycolic acid—water—nitric acid— carbon dioxide

2022, №3

сс. 60-77

M.O. Kostenko, O.O. Parenago, M.Y. Sinev, Ya.I. Zuev, A.E. Lazhko

Key words: tetra-n-octylamide of diglycolic acid, supercritical fluid extraction, carbon dioxide, water, nitric acid, interphase equilibria

Data on the solubility of diglycolic acid tetran-n-octylamide (TODHA) in supercritical (SC) carbon dioxide at 310-360 K and a pressure of 80-250 bar were obtained. The influence of the presence of an aqueous phase containing nitric acid on the solubility of TODGA in SC-CO₂ has been studied. It is shown that the equilibria in the TODGA—water—nitric acid—CO₂ system depend in a complex way on the content of each component in it and the state parameters. The patterns characteristic of the TODGA—SC-CO₂ dual system cannot be transferred to the four-component TODGA—water—nitric acid—CO₂ system, since the presence of highly polar water and nitric acid in it has a critically strong effect on the transition of TODGA to the fluid phase, despite the very low solubility in the structure of these compounds.

doi:10.34984/SCFTP.2022.17.3.007

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ГОСТ
7.0.100-2018

Костенко, М.О. Еquilibria in the system of tetra-n-octylamide of diglycolic acid—water—nitric acid— carbon dioxide / М.О. Костенко, О.О. Паренаго, М.Ю. Синёв [и др.]. – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2022. – Т. 17. – № 3. – С. 60-77.

TRANSLIT

Kostenko, M.O. Ravnovesiia v sisteme tetra-n-oktilamid diglikolevoi kisloty voda azotnaia kislota dioksid ugleroda / M.O. Kostenko, O.O. Parenago, M.Iu. Sinev [i dr.]. – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2022. – Т. 17. – № 3. – S. 60-77.

M.O. Kostenko, O.O. Parenago, M.Y. Sinev, Ya.I. Zuev, A.E. Lazhko Еquilibria in the system of tetra-n-octylamide of diglycolic acid—water—nitric acid— carbon dioxide. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 60-77 (2022). https://doi.org/

Еquilibria in the system of tetra-n-octylamide of diglycolic acid—water—nitric acid— carbon dioxide

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