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公开(公告)号：EP3712113A1
公开(公告)日：2020-09-23
申请号：EP19863980.9
申请日：2019-05-16
发明人： DAI, Yihua , CAI, Rongfu , BAN, Wenjun , YANG, Chunhui , WANG, Xingjong , LI, Yunfeng , LI, Yali , ZHENG, Chuanyong , MENG, Qiang , JIANG, Hongjun
IPC分类号： C01D15/08
摘要： The invention discloses a method and a system for preparing battery grade and high purity grade lithium hydroxide and lithium carbonate from high-impurity lithium sources. The method comprises steps for preparation of a refined lithium salt solution, preparation of battery grade lithium hydroxide, preparation of high purity grade lithium hydroxide, preparation of high purity grade lithium carbonate and preparation of battery grade lithium carbonate. The system comprises a refined lithium salt solution preparation subsystem, a battery grade lithium hydroxide preparation subsystem, a high purity grade lithium hydroxide preparation subsystem, a high purity grade lithium carbonate preparation subsystem and a battery grade lithium carbonate preparation subsystem arranged in turn according to production sequence. To treat the high-impurity lithium sources varying in lithium contents, impurity categories and impurity contents, the invention proposes differentiated combinations of physical and chemical treatment methods to adapt to quality variations of the high-impurity lithium sources and meet quality requirements for production of the battery grade and high purity grade lithium hydroxide and lithium carbonate products. Compared with the existing production processes and technologies, the method of the invention is widely adaptable, most of by-products are recyclable, and the process is economical and environmentally friendly.
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公开(公告)号：EP4019468A1
公开(公告)日：2022-06-29
申请号：EP22156885.0
申请日：2019-05-16
发明人： DAI, Yihua , CAI, Rongfu , BAN, Wenjun , YANG, Chunhui , WANG, Xinglong , LI, Yunfeng , LI, Yali , ZHENG, Chuanyong , MENG, Qiang , JIANG, Hongjun
IPC分类号： C01D15/08 , C01D1/30 , C01D1/32 , C01D1/38 , C01D15/02 , B01D61/02 , B01D61/44 , B01D61/50 , B01D61/58
摘要： The invention discloses a method and a system for preparing battery grade and high purity grade lithium hydroxide and lithium carbonate from high-impurity lithium sources. The method comprises steps for preparation of a refined lithium salt solution, preparation of battery grade lithium hydroxide, preparation of high purity grade lithium hydroxide, preparation of high purity grade lithium carbonate and preparation of battery grade lithium carbonate. The system comprises a refined lithium salt solution preparation subsystem, a battery grade lithium hydroxide preparation subsystem, a high purity grade lithium hydroxide preparation subsystem, a high purity grade lithium carbonate preparation subsystem and a battery grade lithium carbonate preparation subsystem arranged in turn according to production sequence. To treat the high-impurity lithium sources varying in lithium contents, impurity categories and impurity contents, the invention proposes differentiated combinations of physical and chemical treatment methods to adapt to quality variations of the high-impurity lithium sources and meet quality requirements for production of the battery grade and high purity grade lithium hydroxide and lithium carbonate products. Compared with the existing production processes and technologies, the method of the invention is widely adaptable, most of by-products are recyclable, and the process is economical and environmentally friendly.
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