SORPTION OF METALS BY SOLID CROWN ESTER-BASED EXTRACTANTS

The sorption capacity of solid extractants (solexts) based on crown es ters and a granulated porous copolymer of styrene with divinylbenzene is studied in processes of extraction of trace amounts of metals (24 e lements) from hydrochloric acid solutions of different concentrations (from 0.5 to 9 M HCl). Solexts based on di-tert-octyldicyclohexyl-18-c rown-6 are found to possess the highest sorption capacity, extracting 95 - 99% of trace amounts of Fe, Au, Sb, and Ga from a 7 - 9 M solutio n of hydrochloric acid, and 98% of Au from a 3 - 4 M solution of hydro chloric acid.