公开(公告)号：US20220032207A1

公开(公告)日：2022-02-03

申请号：US17397934

申请日：2021-08-09

Applicant: NEMASKA LITHIUM INC.

Inventor： Jean-François MAGNAN ,  Guy BOURASSA ,  Nicolas LAROCHE ,  Bertin OUELLET ,  Clive BRERETON ,  Steven BUCHI ,  Tsuki NAKA

IPC: B01D9/00 ,  C01D5/16 ,  B01D5/00

Abstract: The present disclosure relates to processes for treating an aqueous composition comprising lithium sulfate and sulfuric acid. The processes comprise evaporatively crystallizing the aqueous composition comprising lithium sulfate and sulfuric acid under conditions to obtain crystals of lithium sulfate monohydrate and a lithium sulfate-reduced solution; and optionally separating the crystals of the lithium sulfate monohydrate from the lithium sulfate-reduced solution. The processes optionally further comprise concentrating the lithium sulfate-reduced solution under conditions to obtain an acidic condensate and a concentrate comprising sulfuric acid.

公开(公告)号：US20180244531A1

公开(公告)日：2018-08-30

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

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：US20170022617A1

公开(公告)日：2017-01-26

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

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.

Abstract translation: 本发明涉及从含锂材料中提取锂的方法。 例如，该方法可以包括在适于获得包含诸如硫酸锂和/或硫酸氢锂的锂化合物的水性组合物的条件下浸出焙烧的含锂材料。 包含硫酸锂和/或硫酸氢锂的水性组合物可以任选地用于例如包含电解质工艺的制备氢氧化锂的方法中。 焙烧的含锂材料可以例如通过使用包含任选的硫酸锂和/或硫酸氢锂的水性组合物的方法来制备，所述水性组合物可以由制备氢氧化锂的方法获得，所述方法包括电化学方法如两室 单极或双极电解过程。

公开(公告)号：US20160032471A1

公开(公告)日：2016-02-04

申请号：US14776922

申请日：2014-03-17

Applicant: NEMASKA LITHIUM INC.

Inventor： Jean-François MAGNAN ,  Guy BOURASSA ,  Gary PEARSE ,  Peter SYMONS ,  David J. GENDERS ,  Daniel BAR ,  Marie-Eve LANGEVIN

IPC: C25B15/02 ,  C25B1/00 ,  C25B13/02 ,  C25B1/16

CPC classification number: C25B15/02 ,  B01D61/44 ,  B01D61/445 ,  C25B1/00 ,  C25B1/16 ,  C25B9/08 ,  C25B13/02 ,  Y02E60/366

Abstract: There are provided processes for preparing lithium hydroxide that comprise submitting an aqueous composition comprising a lithium compound to an electrolysis or an electrodialysis under conditions suitable for converting at least a portion of the lithium compound into lithium hydroxide. For example, the lithium compound can be lithium sulphate and the aqueous composition can be at least substantially maintained at a pH having a value of about 1 to about 4.

Abstract translation: 提供了制备氢氧化锂的方法，其包括将包含锂化合物的水性组合物在适于将至少一部分锂化合物转化为氢氧化锂的条件下进行电解或电渗析。 例如，锂化合物可以是硫酸锂，并且水性组合物可以至少基本上保持在具有约1至约4的值的pH。