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1.112022011442PROCESSO E MÉTODO PARA REFINAR CARBONATO DE LÍTIO A PARTIR DE UMA SOLUÇÃO DE CLORETO DE LÍTIO IMPURA
BR 30.08.2022
Int.Class C01D 15/08
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
DCOMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
15Lithium compounds
08Carbonates; Bicarbonates
Appl.No CA2020000134 Applicant THE UNIVERSITY OF BRITISH COLUMBIA Inventor JASON ELLIS HEIN
PROCESSO E MÉTODO PARA REFINAR CARBONATO DE LÍTIO A PARTIR DE UMA SOLUÇÃO DE CLORETO DE LÍTIO IMPURA. Um método para refinar lítio de uma salmoura bruta inclui carregar uma salmoura bruta em um tanque de alimentação mantido a uma temperatura T1 e contendo uma fonte de carbonato suficiente para precipitar todos os sólidos formadores de carbonato na salmoura bruta para formar uma mistura de precipitado e um sobrenadante isento de cristal; bombear o sobrenadante isento de cristal do tanque de alimentação para um primeiro reator de cristalização que é mantido a uma temperatura T2 para cristalizar um sal de carbonato de lítio para fora do sobrenadante isento de cristal; em que a temperatura T1 é inferior à temperatura T2; e controlar uma taxa de fluxo para manter uma concentração em estado estacionário do sal de carbonato de lítio na fase de solução do reator de cristalização.
2.WO/2021/113948PROCESS AND METHOD FOR REFINING LITHIUM CARBONATE STARTING FROM AN IMPURE LITHIUM CHLORIDE SOLUTION
WO 17.06.2021
Int.Class C01D 15/08
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
DCOMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
15Lithium compounds
08Carbonates; Bicarbonates
Appl.No PCT/CA2020/000134 Applicant THE UNIVERSITY OF BRITISH COLUMBIA Inventor HEIN, Jason, Ellis
A method for refining lithium from a crude brine includes charging a crude brine into a feeder tank held at a temperature T1 and containing a sufficient carbonate source to precipitate all carbonate-forming solids in the crude brine to form a precipitate mixture and a crystal free supernatant; pumping the crystal free supernatant from the feeder tank to a first crystallization reactor that is held at a temperature T2 to crystallize a lithium carbonate salt out of the crystal free supernatant; wherein the temperature T1 is lower than the temperature T2; and controlling a flow rate to maintain a steady state concentration of the lithium carbonate salt in the solution phase of the crystallization reactor.