发明名称 |
Production of lithium compounds directly from lithium containing brines |
摘要 |
A continuous process for directly preparing high purity lithium carbonate from lithium containing brines by preparing a brine containing about 6.0 wt % lithium and further containing other ions naturally occurring in brines; adding mother liquor containing carbonate to precipitate magnesium; adding a solution of CaO and sodium carbonate to remove calcium and any residual magnesium; precipitating lithium carbonate from the purified brine by adding soda ash solution; filtering to obtain solid lithium carbonate; preparing an aqueous slurry of the lithium carbonate and introducing carbon dioxide gas at a temperature from at least minus 10 to +40° C.; passing the lithium bicarbonate solution through a filter to clarify the solution; introducing said filtered lithium bicarbonate solution into a reactor and adjusting the temperature of the solution to from 60-100° C. to precipitate ultra-pure lithium carbonate.
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申请公布号 |
US7157065(B2) |
申请公布日期 |
2007.01.02 |
申请号 |
US20030395984 |
申请日期 |
2003.03.25 |
申请人 |
CHEMETALL FOOTE CORPORATION |
发明人 |
BORYTA DANIEL ALFRED;KULLBERG TERESITA FRIANEZA;THURSTON ANTHONY MICHAEL |
分类号 |
C01D15/08;C01D15/04;C01F5/22;C01F11/18;C01F11/46;C22B3/44;C22B26/12 |
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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