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    PROCESSES FOR PREPARING LITHIUM CARBONATE
    63.
    发明公开
    PROCESSES FOR PREPARING LITHIUM CARBONATE 审中-公开

    公开(公告)号：EP3363930A1

    公开(公告)日：2018-08-22

    申请号：EP18160013.1

    申请日：2013-05-30

    Applicant: Nemaska Lithium Inc.

    Inventor： BOURASSA, Guy ,  PEARSE, Gary ,  MACKIE, Stephen Charles ,  GLADKOVAS, Mykolas

    IPC: C25B1/16 ,  C01D15/08 ,  C22B3/04 ,  C22B26/12

    CPC classification number: C01D15/08 ,  C25B1/16 ,  C25B15/08

    Abstract: There are provided methods for preparing lithium carbonate. For example, such methods can comprise reacting an aqueous composition comprising lithium hydroxide with CO 2 by sparging the CO 2 the said composition, thereby obtaining a precipitate comprising the lithium carbonate. The methods can also comprise inserting at least a portion of the precipitate into a clarifier and obtaining a supernatant comprising lithium bicarbonate and a solid comprising the lithium carbonate, separating the solid from the supernatant; and heating the supernatant at a desired temperature so as to at least partially convert the lithium bicarbonate into lithium carbonate.

    METHOD FOR RECOVERING LITHIUM CARBONATE
    69.
    发明公开
    METHOD FOR RECOVERING LITHIUM CARBONATE 审中-公开
    回收碳酸锂的方法

    公开(公告)号：EP2828201A4

    公开(公告)日：2015-11-25

    申请号：EP13764996

    申请日：2013-03-19

    Applicant: OUTOTEC FINLAND OY

    Inventor： TIIHONEN MARIKA ,  HAAVANLAMMI LIISA

    IPC: C01D15/08 ,  B01D9/00 ,  B01J10/00 ,  C01D7/06 ,  C22B3/04 ,  C22B26/12

    CPC classification number: C01D15/08 ,  B01D9/00 ,  B01J10/00 ,  C22B26/12 ,  Y02P20/142

    Abstract: A method and arrangement for recovering lithium carbonate from a raw material containing lithium, which method comprises pulping (1) the raw material containing lithium in the presence of water and sodium carbonate for producing a slurry containing lithium from the raw material containing lithium. After pulping the lithium-containing slurry is leached (2) for dissolving the lithium in the solution thus producing a solution containing lithium carbonate. After pulping and leaching the method comprises carbonating (3) the solution containing lithium carbonate by using carbon dioxide under atmospheric conditions for producing a solution containing lithium bicarbonate and separating (4) the solids form the solution. The solution containing lithium bicarbonate is purified (5) to produce a purified solution containing lithium bicarbonate, and recovering by crystallizing (6) lithium carbonate from the purified lithium bicarbonate-containing solution.

    VERFAHREN ZUR HYDROMETALLURGISCHEN RÜCKGEWINNUNG VON LITHIUM AUS DER LITHIUM-EISEN-PHOSPHAT HALTIGEN FRAKTION GEBRAUCHTER GALVANISCHER ZELLEN
    70.
    发明公开
    VERFAHREN ZUR HYDROMETALLURGISCHEN RÜCKGEWINNUNG VON LITHIUM AUS DER LITHIUM-EISEN-PHOSPHAT HALTIGEN FRAKTION GEBRAUCHTER GALVANISCHER ZELLEN 有权
    海德鲁冶炼金属回收率从锂磷酸铁锂含分数的方法中使用的原电池

    公开(公告)号：EP2906731A2

    公开(公告)日：2015-08-19

    申请号：EP13799482.8

    申请日：2013-10-09

    Applicant: Rockwood Lithium GmbH

    Inventor： WOHLGEMUTH, David ,  SCHNEIDER, Mark Andre ,  SPIELAU, Rebecca ,  WILLEMS, Johannes ,  STEINBILD, Martin

    IPC: C22B7/00 ,  C22B26/12

    CPC classification number: C22B26/12 ,  B01D61/445 ,  B01D61/58 ,  C01B25/45 ,  C01D15/02 ,  C22B7/007 ,  Y02P10/234

    Abstract: The invention relates to a method for the hydrometallurgical recovery of lithium from the fraction of used galvanic cells containing lithium, iron and phosphate. According to the invention, a fraction containing lithium, iron and phosphate having an aluminum content of up to 5% by weight, and having a particle size of up to 150 μm, is introduced into sulfuric acid having a concentration of 0.5 to 3 mol/l in an amount that is at least stoichiometric relative to the lithium content of the fraction containing lithium, iron and phosphate and in a solid-to-liquid ratio in the range of 100 to 750 g/l, hydrogen peroxide is added in an amount that is at least stoichiometric relative to the iron content which is to be oxidized of the lithium iron phosphate-containing fraction or a lithium iron phosphate-containing fraction having an aluminum content of up to 5% by weight, and having a particle size of up to 500 μm, is introduced into hydrochloric acid having a concentration of 0.5 to 3 mol/l in an amount that is at least stoichiometric relative to the lithium content of the lithium iron phosphate-containing fraction and in a solid-to-liquid ratio in the range of 50 to 450 g/l, hydrogen peroxide is solublized at temperature of between 25 - 70°C in an amount that is at least stoichiometric relative to the iron content which is to be oxidised of the lithium iron phosphate-containing fraction or a lithium iron phosphate-containing fraction, the solution that contains the lithium sulphate solution or lithium chloride solution is separated off and the remaining residue is washed at least twice, the wash solution containing the separated lithium sulphate and the lithium sulphate and the wash solutions containing the lithium chloride and the lithium chloride are combined, and are converted to lithium hydroxide by electrodialysis on bipolar membranes.

    Abstract translation: 一种用于锂从含锂，铁和磷酸根使用原电池的分数湿法冶金回收方法。

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