PROCESSO DE REGENERACAO DE UMA RESINA DE TROCA ANIONICA DE BASE FORTE E PROCESSO PARA RECUPERACAO DE VALORES DE METAIS SELECIONADOS,A PARTIR DE UMA SOLUCAO DE LIXIVIA CONTENDO TAIS METAIS EM FORMA ANIONICA COMPLEXA

摘要

A method of regenerating strong-base anion exchange resins which have been used in the extraction of complex anions followed by elution with a thiocyanate strip solution is provided. The method involves the use of ferric ions in a regenerating solution together with a substitute anion for attachment of the resin, the regeneration taking place under conditions in which ferric-thiocyanate complex cations are formed and washed from the resin by the regenerating solution. The thiocyanate can be recovered by neutralizing the regenerating solution to precipitate ferric hydroxide and leave thiocyanate in solution.