公开(公告)号：US10597305B2

公开(公告)日：2020-03-24

申请号：US15755507

申请日：2016-08-26

Applicant: NEMASKA LITHIUM INC.

Inventor： Jean-François Magnan ,  Guy Bourassa ,  Nicolas Laroche ,  Gary Pearse ,  Stephen Charles Mackie ,  Mykolas Gladkovas ,  Peter Symons ,  J. David Genders ,  Geneviève Clayton ,  Pierre Bouchard ,  Bertin Ouellet

IPC: C25C7/04 ,  C25C7/00 ,  C01D15/06 ,  C01D15/02 ,  C22B1/02 ,  C22B3/08 ,  C25B1/16 ,  C22B3/22 ,  C22B7/00 ,  C22B26/12 ,  B01D61/02 ,  B01D61/44 ,  B01D61/58 ,  C25B9/08 ,  B01D61/46 ,  C25B15/08

Abstract: The disclosure relates to methods for preparing lithium hydroxide. For example, such methods can comprise mixing a lithium-containing material with an acidic aqueous composition optionally comprising lithium sulfate and thereby obtaining a mixture; roasting the mixture under suitable conditions to obtain a roasted, lithium-containing material; leaching the roasted material under conditions suitable to obtain a first aqueous composition comprising lithium sulfate; submitting the first aqueous composition comprising lithium sulfate to an electromembrane process under suitable conditions for at least partial conversion of the lithium sulfate into lithium hydroxide and to obtain a second aqueous composition comprising lithium sulfate, the electromembrane process involving a hydrogen depolarized anode; optionally increasing concentration of acid in the second aqueous composition; and using the second aqueous composition comprising lithium sulfate as the acidic aqueous composition optionally comprising lithium sulfate for mixing with the lithium-containing material and to obtain the mixture.

公开(公告)号：US10544512B2

公开(公告)日：2020-01-28

申请号：US15119472

申请日：2015-02-24

Applicant: NEMASKA LITHIUM INC.

Inventor： Jean-François Magnan ,  Guy Bourassa ,  Nicolas Laroche ,  Gary Pearse ,  Stephen Charles Mackie ,  Mykolas Gladkovas ,  Peter Symons ,  J. David Genders ,  Geneviève Clayton ,  Pierre Bouchard

IPC: B01D61/44 ,  B01D61/58 ,  C22B1/06 ,  C22B3/08 ,  C25B1/16 ,  B01D61/42 ,  C01D15/02 ,  C01D15/06 ,  C22B1/02 ,  B01D61/02

Abstract: The present disclosure relates to a method for extracting lithium from a lithium-containing material. For example, the method can comprise leaching a roasted lithium-containing material under conditions suitable to obtain an aqueous composition comprising a lithium compound such as lithium sulfate and/or lithium bisulfate. The aqueous composition comprising lithium sulfate and/or lithium bisulfate can optionally be used, for example, in a method for preparing lithium hydroxide comprising an electromembrane process. The roasted lithium-containing material can be prepared, for example by a method which uses an aqueous composition comprising optionally lithium sulfate and/or lithium bisulfate which can be obtained from a method for preparing lithium hydroxide comprising an electromembrane process such as a two-compartment monopolar or bipolar electrolysis process.

公开(公告)号：US10144990B2

公开(公告)日：2018-12-04

申请号：US15031746

申请日：2014-10-23

Applicant: NEMASKA LITHIUM INC.

Inventor： Guy Bourassa ,  Gary Pearse ,  Stephen Charles Mackie ,  Mykolas Gladkovas ,  Peter Symons ,  David J. Genders ,  Jean-François Magnan ,  Geneviève Clayton

IPC: C01D7/07 ,  C25B1/16 ,  C22B26/12 ,  B01D61/42 ,  B01D61/44 ,  C22B3/44 ,  C22B4/02 ,  C25B1/14 ,  C25B9/08 ,  C25B9/18

Abstract: There are provided processes comprising submitting an aqueous composition comprising lithium sulphate and/or bisulfate to an electrolysis or an electrodialysis for converting at least a portion of said sulphate into lithium hydroxide. During electrolysis or electrodialysis, the aqueous composition is at least substantially maintained at a pH having a value of about 1 to about 4; and converting said lithium hydroxide into lithium carbonate. Alternatively, lithium sulfate and/or lithium bisulfate can be submitted to a first electromembrane process that comprises a two-compartment membrane process for conversion of 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 said first lithium-reduced aqueous stream to a second electromembrane process comprising a three-compartment membrane process 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.

公开(公告)号：US09890053B2

公开(公告)日：2018-02-13

申请号：US15190296

申请日：2016-06-23

Applicant: Nemaska Lithium Inc.

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

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

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.

公开(公告)号：US09677181B2

公开(公告)日：2017-06-13

申请号：US14396109

申请日：2013-04-23

Applicant: Nemaska Lithium Inc.

Inventor： Guy Bourassa ,  Gary Pearse ,  Stephen Charles Mackie ,  Mykolas Gladkovas ,  J. David Genders ,  Peter Symons ,  Jean-François Magnan

IPC: B01D61/46 ,  C25B1/16 ,  B01D61/44 ,  B01D61/42 ,  C22B7/00 ,  C22B26/12

CPC classification number: C25B1/16 ,  B01D61/422 ,  B01D61/44 ,  C22B7/006 ,  C22B26/12

Abstract: There are provided methods for preparing lithium hydroxide. For example, such methods can comprise submitting an aqueous composition comprising a lithium compound to an electrolysis under conditions suitable for converting at least a portion of said lithium compound into lithium hydroxide.

公开(公告)号：US20150139886A1

公开(公告)日：2015-05-21

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

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。