This paper presents results or the analysis of process variables for separating light REE and heavy REE, in chloride media, by solvent extraction. DEHPA-Isoparaffin was used as the extraction system and the liquor was produced in the laboratory by dissolving REE oxides in HCl to simulate leaching liquor originating from monazitic ores after cerium removal. The following parameters were determined: pH of work, extractant concentration, reaction time, and number of extraction stages. A continuous extraction circuit was operated and its behavior was similar to that shown by batch extraction tests.
RESUMO -O presente trabalho apresenta os resultados ou a análise das variáveis de processo para a separação de terras raras leves e pesadas, em meio clorídrico, por extração por solventes. Reagentes organofosforados e isoparafina foram usados como sistemas de extração e o licor foi produzido em laboratório por dissolução de óxidos de terras raras em HCl para simular um licor de lixiviação proveniente de minérios monazíticos, após a remoção do cério. Os seguintes parâmetros foram determinados: pH de trabalho e concentração do extratante. Um circuito contínuo de extração foi operado e seu comportamento foi similar aos apresentados nos testes em batelada.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.