Preparation of lanthanum acetate from a mixed rare earths concentrate
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2023
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BRAZIL MRS MEETING, 21st
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Resumo
A 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.
Como referenciar
QUEIROZ, 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. Abstract... São Carlos, SP: Aptor Software, 2023. p. 1153-1153. Disponível em: http://repositorio.ipen.br/handle/123456789/34554. Acesso em: 13 Feb 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.