发明名称 |
Method for the production of battery grade lithium carbonate from natural and industrial brines |
摘要 |
It is possible to produce battery grade metallic lithium from naturally occurring or industrial brine by a process comprising the following steps: (i) precipitating magnesium with calcium hydroxide; (ii) removal of boron via extraction of solvents; (iii) precipitation of lithium with sodium carbonate; (iv) transformation of lithium carbonate to bicarbonate of lithium with carbonic acid; (v) decomposition of bicarbonate of lithium into high purity lithium carbonate as a result of heating of the solution. Re-precipitation of lithium carbonate by the formation of bicarbonate of lithium allows for the removal of the majority of contaminants which co-purify with lithium carbonate and yield battery grade highly purified lithium carbonate. |
申请公布号 |
US8691169(B2) |
申请公布日期 |
2014.04.08 |
申请号 |
US201213627089 |
申请日期 |
2012.09.26 |
申请人 |
MINERA EXAR S.A. |
发明人 |
PEREZ WALDO;BARRIENTOS HUGO ADAN CARLOS;SUAREZ CLAUDIO;BRAVO MARCELO |
分类号 |
C22B26/00 |
主分类号 |
C22B26/00 |
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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