公开(公告)号：US20230175100A1

公开(公告)日：2023-06-08

申请号：US18103075

申请日：2023-01-30

Applicant: Tenova Advanced Technologies Ltd.

Inventor： Mark Stephen JABLONKA ,  Ziv DEE NOOR ,  Hani AHARON

IPC: C22B26/12 ,  C22B3/08 ,  C25D1/02

CPC classification number: C22B26/12 ,  C22B3/08 ,  C25D1/02

Abstract: A process for producing a purified aqueous lithium (sulfate) solution including: processing a lithium-containing raw material to produce a crude aqueous solution containing lithium sulfate; contacting the crude solution with an organic medium, in an extraction step to produce a lithium-loaded organic medium and a raffinate; stripping said lithium-loaded organic medium by means of an aqueous acid stripping solution (e.g., sulfuric acid), to extract the lithium cations from the lithium-loaded medium, to produce: the purified aqueous lithium (sulfate) solution and a stripped organic medium; separating the purified lithium solution from the stripped organic medium; recycling the stripped organic medium to the extraction step, the organic medium including the stripped organic medium; subjecting the raffinate to electrolysis to produce: an alkali (sodium) hydroxide solution contaminated with lithium and a sulfuric acid stream; and recycling the alkali hydroxide and sulfuric acid streams for use within the process.