Invention Grant
- Patent Title: Processes and systems for preparing lithium hydroxide
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Application No.: US15031589Application Date: 2014-10-23
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Publication No.: US10036094B2Publication Date: 2018-07-31
- Inventor: Jean-François Magnan , Guy Bourassa , Gary Pearse , Peter Symons , David J. Genders , Geneviève Clayton
- Applicant: NEMASKA LITHIUM INC.
- Applicant Address: CA Québec
- Assignee: Nemaska Lithium Inc.
- Current Assignee: Nemaska Lithium Inc.
- Current Assignee Address: CA Québec
- Agency: Bereskin & Parr LLP/S.E.N.C.R.L., s.r.l.
- International Application: PCT/CA2014/000769 WO 20141023
- International Announcement: WO2015/058288 WO 20150430
- Main IPC: C25B1/16
- IPC: C25B1/16 ; C25B9/08 ; C25B9/18 ; B01D61/42

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.
Public/Granted literature
- US20160258071A1 PROCESSES AND SYSTEMS FOR PREPARING LITHIUM HYDROXIDE Public/Granted day:2016-09-08
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