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1. 发明授权

US3857920A Recovery of lithium carbonate 失效
标题翻译：回收碳酸锂
公开(公告)号：US3857920A
公开(公告)日：1974-12-31
申请号：US16733771
申请日：1971-07-29
申请人： DEPARTMENT OF HEALTH EDUCATION
发明人： GRANTHAM L , YOSIM S
IPC分类号： C01D15/08 , C22B26/12 , C01D11/02 , C01D7/22
CPC分类号： C22B26/12 , C01D15/08 , Y10S423/12
摘要： Lithium carbonate is recovered from an aqueous slurry by first treating the sparingly soluble lithium carbonate with carbon dioxide to convert it to the much more soluble lithium bicarbonate. The bicarbonate solution is next separated from insoluble material present and then decarbonated to precipitate lithium carbonate, which is then recovered. The present process is of particular utility for the recovery of lithium carbonate from fly ash- and coke-containing filter cakes resulting from a process for the treatment of flue gas to remove sulfur dioxide present therein by absorption of the sulfur dioxide in a molten alkali metal carbonate mixture.
摘要翻译：通过首先用二氧化碳处理微溶碳酸锂以将其转化为更易溶解的碳酸氢锂，从含水浆液中回收碳酸锂。然后将碳酸氢盐溶液与存在的不溶物分离，然后脱碳以沉淀碳酸锂，然后回收碳酸锂。本发明的方法特别适用于从通过吸收二氧化硫在熔融碱金属中处理烟道气以除去二氧化硫的方法得到的粉煤灰和含焦炭滤饼中回收碳酸锂碳酸盐混合物。

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