公开(公告)号：US11083978B2

公开(公告)日：2021-08-10

申请号：US16328220

申请日：2017-08-28

Applicant: NEMASKA LITHIUM INC.

Inventor： Jean-François Magnan ,  Guy Bourassa ,  Nicolas Laroche ,  Bertin Ouellet ,  Clive Brereton ,  Steven Buchi ,  Tsuki Naka

IPC: B01D9/00 ,  C01D15/06

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.