METHOD OF PRODUCING SOLID EXTRACTION AGENTS FOR EXTRACTING RARE METALS FROM ACIDIC SOLUTIONS Russian patent published in 2010 - IPC C08F212/08 C22B59/00 C08F2/24 

FIELD: chemistry.

SUBSTANCE: present invention relates to methods of producing solid extraction agents of metal salts for extraction chromatography and hydrometallurgy. The invention describes a method of producing solid extraction agents for extracting rare metals from acidic solutions, involving radical polymerisation of styrene and divinylbenzene in the presence of an extraction agent and a polymerisation initiator with dispersion in an aqueous starch solution and subsequent extraction of the extraction agent. The method is distinguished by that the extraction agent used is cyclic polyester dissolved in an organic solvent or a mixture of organic solvents in the ratio styrene : divinylbenzene : polyester = 0.80 - 0.83 - 0.57 - 0.60 - 1.0 - 1.1.

EFFECT: obtaining a solid extraction agent for extracting rare metals from sulphuric acid solutions, which is characterised by high extraction ratio and selectivity.

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