发明名称 |
PROCESSES FOR PREPARING LITHIUM CARBONATE |
摘要 |
There are provided processes comprising submitting an aqueous composition comprising lithium sulphate and/or bisulfate to an electrolysis or an electrodialysis for converting at least a portion of said sulphate into lithium hydroxide. During electrolysis or electrodialysis, the aqueous composition is at least substantially maintained at a pH having a value of about 1 to about 4; and converting said lithium hydroxide into lithium carbonate. Alternatively, lithium sulfate and/or lithium bisulfate can be submitted to a first electromembrane process that comprises a two-compartment membrane process for conversion of 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 said first lithium-reduced aqueous stream to a second electromembrane process comprising a three-compartment membrane process 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. |
申请公布号 |
CA2928224(A1) |
申请公布日期 |
2015.04.30 |
申请号 |
CA20142928224 |
申请日期 |
2014.10.23 |
申请人 |
NEMASKA LITHIUM INC. |
发明人 |
SYMONS, PETER;GENDERS, J. DAVID;BOURASSA, GUY;CLAYTON, GENEVIEVE;GLADKOVAS, MYKOLAS;MACKIE, STEPHEN CHARLES;MAGNAN, JEAN-FRANCOIS;PEARSE, GARY |
分类号 |
C01D15/08;B01D61/42;C25B1/10 |
主分类号 |
C01D15/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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