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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10597305 B1

PDFFull Text
Date of Patent:
Mar. 24, 2020

Filed:

Aug. 26, 2016

Methods for treating lithium-containing materials

Applicant:

Nemaska Lithium Inc., Québec, CA;

Inventors:

Jean-François Magnan, Neuville, CA;

Guy Bourassa, Québec, CA;

Nicolas Laroche, Pont-Rouge, CA;

Gary Pearse, Ottawa, CA;

Stephen Charles Mackie, Peterborough, CA;

Mykolas Gladkovas, Toronto, CA;

Peter Symons, Williamsville, NY (US);

J. David Genders, Elma, NY (US);

Geneviève Clayton, Pierrefonds, CA;

Pierre Bouchard, Notre-Dame-du-Mont-Carmel, CA;

Bertin Ouellet, Bécancour, CA;

Assignee:

NEMASKA LITHIUM INC., Québec, CA;

Attorney:

Bereskin & Parr LLP/S.E.N.C.R.L., s.r.l.

Primary Examiner:

Zulmariam Mendez

Int. Cl.
CPC ...
C25C 7/04 (2006.01); C25C 7/00 (2006.01); C01D 15/06 (2006.01); C01D 15/02 (2006.01); C22B 1/02 (2006.01); C22B 3/08 (2006.01); C25B 1/16 (2006.01); C22B 3/22 (2006.01); C22B 7/00 (2006.01); C22B 26/12 (2006.01); B01D 61/02 (2006.01); B01D 61/44 (2006.01); B01D 61/58 (2006.01); C25B 9/08 (2006.01); B01D 61/46 (2006.01); C25B 15/08 (2006.01);
U.S. Cl.
CPC ...
C01D 15/06 (2013.01); B01D 61/025 (2013.01); B01D 61/445 (2013.01); B01D 61/46 (2013.01); B01D 61/58 (2013.01); C01D 15/02 (2013.01); C22B 1/02 (2013.01); C22B 3/08 (2013.01); C22B 3/22 (2013.01); C22B 7/007 (2013.01); C22B 26/12 (2013.01); C25B 1/16 (2013.01); C25B 9/08 (2013.01); C25B 15/08 (2013.01); Y02P 10/234 (2015.11);
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.

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