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The separation of mixtures of rare earth elements (REE) is difficult to perform due to the similarities of their\udchemical and physical properties. Literature report the particular property in Ce ion oxidize in contact with strong\udoxidizing agents and thus enable their separation from other REE. This paper presents results of bench tests in order to\udinvestigate operational parameters for precipitation of Ce ion from a rare earths chloride liquor. It was tested oxidants/\udprecipitating as the pair permanganate/carbonate and peroxide/urea to Ce ion selective precipitation. It was investigated\udin both cases, the variables reaction temperature, time and pH. The results show that the two pairs analyzed show to\udbe effective in the precipitation of the Ce ion, however, there is higher selectivity for the pair permanganate/carbonate

USO DE AGENTES OXIDANTES/PRECIPITANTES PERMANGANATO/CARBONATO E PERÓXIDO/URÉIA PARA PRECIPITAÇÃO SELETIVA DO ÍON CÉRIO