Open AccessExtraction of macro quantities of scandium (III) in antipyrine-benzoic acid-water segregate system without the use of organic solvents
Author(s) -
Irina A. Starichenko,
М. И. Дегтев,
Yulia B. Elchischeva,
Petr Melnikov
Publication year - 2021
Publication title -
vestnik permskogo universiteta. seriâ himiâ
Language(s) - English
Resource type - Journals
ISSN - 2223-1838
DOI - 10.17072/2223-1838-2021-2-126-138
Subject(s) - scandium , hydrochloric acid , chemistry , benzoic acid , nitric acid , salting out , extraction (chemistry) , aqueous solution , homogenization (climate) , aqueous two phase system , inorganic chemistry , salt (chemistry) , chromatography , organic chemistry , biodiversity , ecology , biology
The optimal conditions of separation of aqueous system containing antipyrine, benzoic acid, hydrochloric or nitric acids, inorganic salting-out agents, and water at 85 ° C have been determined. The resulting organic phase contains the antipyrinium benzoate salt, which is a phase former. It is shown that the concentration of hydrochloric and nitric acids in the range of 0,01–0,20 mol/l promotes the stratification of the system, and above 0.4 mol l leads to homogenization. The conditions for the quantitative or maximum extraction of macroquantities of scandium (III) in the studied systems were found and their extraction capacity was determined. Inorganic salting-out agents provide separation even in the presence of 0,5 mol/l hydrochloric or nitric acid, while the degree of extraction of scandium (III) ions is significantly increased.