QUEIROZ, CARLOS A. da S.2024-02-082024-02-08QUEIROZ, CARLOS A. da S. Preparation of lanthanum acetate from a mixed rare earths concentrate. In: BRAZIL MRS MEETING, 21st, October 1-5, 2023, Maceió, AL. <b>Abstract...</b> São Carlos, SP: Aptor Software, 2023. p. 1153-1153. Disponível em: http://repositorio.ipen.br/handle/123456789/34554.http://repositorio.ipen.br/handle/123456789/34554A simple and economical chemical process to obtaining lanthanum acetate of high purity was studied. The raw material in the form of mixed rare earths carbonate 24% La2O3 comes from commercial Brazilian monazite. It is used the technique of strong cationic exchange resin, proper to water treatment to the lanthanum''s fractionation and it is achieved a purity of 99.9% La2O3 and yield greater than or equal 90%, with the elution of rare earths by EDTA solution at pH 4.0. The complex of EDTA-La is transformed in La2O3 , subsequently the lanthanum oxide is dissolved in acetic acid to obtain the cerium acetate. The solid salt then is characterized via chemical analysis, thermal analysis, X ray diffraction, infrared spectroscopy and mass spectrometry to certify the lanthanum acetate purity. The analytical data collected allowed to conclude that the stechiometric formula for the compound is La (CH3COO)3.1.5 H2O.1153-1153openAccessResumo de eventos científicos