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    Processes for preparing lithium carbonate
    5.
    发明授权
    Processes for preparing lithium carbonate 有权

    公开(公告)号：US10800663B2

    公开(公告)日：2020-10-13

    申请号：US15861587

    申请日：2018-01-03

    Applicant: NEMASKA LITHIUM INC.

    Inventor： Guy Bourassa ,  Gary Pearse ,  Stephen Charles Mackie ,  Mykolas Gladkovas

    IPC: C01D15/08 ,  C25B15/08 ,  C25B1/16

    Abstract: There are provided methods for preparing lithium carbonate. For example, such methods can comprise reacting an aqueous composition comprising lithium hydroxide with CO2 by sparging the CO2 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.

    Processes for preparing lithium carbonate
    6.
    发明授权
    Processes for preparing lithium carbonate 有权
    制备碳酸锂的方法

    公开(公告)号：US09382126B2

    公开(公告)日：2016-07-05

    申请号：US14404466

    申请日：2013-05-30

    Applicant: Nemaska Lithium Inc.

    Inventor： Guy Bourassa ,  Gary Pearse ,  Stephen Charles Mackie ,  Mykolas Gladkovas

    IPC: C01D15/08 ,  C25B1/16 ,  C25B15/08

    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 CO2 by sparging the CO2 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.

    Abstract translation: 提供了制备碳酸锂的方法。 例如，这样的方法可以包括通过将CO 2喷射到所述组合物来使包含氢氧化锂的水性组合物与CO 2反应，从而获得包含碳酸锂的沉淀物。 所述方法还可以包括将至少一部分沉淀物插入澄清器中并获得含有碳酸氢锂和包含碳酸锂的固体的上清液，从上清液中分离固体; 并在所需温度下加热上清液，以至少部分地将碳酸氢锂转化为碳酸锂。

    Processes and systems for preparing lithium hydroxide
    10.
    发明授权
    Processes and systems for preparing lithium hydroxide 有权

    公开(公告)号：US10036094B2

    公开(公告)日：2018-07-31

    申请号：US15031589

    申请日：2014-10-23

    Applicant: NEMASKA LITHIUM INC.

    Inventor： Jean-François Magnan ,  Guy Bourassa ,  Gary Pearse ,  Peter Symons ,  David J. Genders ,  Geneviève Clayton

    IPC: C25B1/16 ,  C25B9/08 ,  C25B9/18 ,  B01D61/42

    CPC classification number: C25B1/16 ,  B01D61/422 ,  B01D2311/2684 ,  C25B9/08 ,  C25B9/18

    Abstract: There are provided processes for preparing lithium hydroxide. The processes comprise submitting an aqueous composition comprising lithium sulfate and/or lithium bisulfate to a first electromembrane process that comprises a two-compartment membrane process under suitable conditions for conversion of the lithium sulfate and/or lithium bisulfate to lithium hydroxide, and obtaining a first lithium-reduced aqueous stream and a first lithium hydroxide-enriched aqueous stream; and submitting the first lithium-reduced aqueous stream to a second electromembrane process that comprises a three-compartment membrane process under suitable conditions to prepare at least a further portion of lithium hydroxide and obtaining a second lithium-reduced aqueous stream and a second lithium-hydroxide enriched aqueous stream. There are also provided systems for preparing lithium hydroxide.

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