METHOD FOR PRODUCING COMPLEX-FORMING SORBENT FOR SELECTIVE EXTRACTION OF INDIA

摘要

1. A method of obtaining a complexing sorbent for the selective extraction of indium, including the introduction of hemiphosphonic functional groups, characterized in that, in order to increase the selectivity and sorption capacity for indium, the introduction of hemiphosphonic functional groups is carried out by treating phosphoric acid with a spherogranulated cross-linked macroporous copolymer of acrylonitrile and divinyl 140-160 ° C for 13-35 hours 2. The method according to paragraph 1, characterized in that the production process is carried out in a diluent medium (chlorobenzene) in the temperature range of 100-130 ° C.