Extraction of cerium(IV) with versatic 911 and its separation from lanthanide elements

A rapid and selective method for the extraction and separation of Ce(IV) with liquid cation exchanger, Versatic 911, in benzene has been developed. The distribution coefficient (D) of Ce(IV) with Versatic 911 between the organic and the aqueous phases shows high values (248 to 497.5) in the pH range 5.1-5.6. The equilibration between the two phases is achieved within 1 min. The species extracted in the organic phase contains Ce(IV) and the extractant in the ratio 1:4. Ce(IV) has been quantitatively separated from various binary and synthetic mixtures containing rare earth elements. (author)