基本信息:
- 专利标题： METHOD FOR RECOVERING LITHIUM AND METHOD FOR PRODUCING LITHIUM CARBONATE
- 申请号：EP21882366.4 申请日：2021-04-13
- 公开(公告)号：EP4230753A1 公开(公告)日：2023-08-23
- 发明人： ABE, Takuro , HOSODA, Naoki , KATAYAMA, Shinsuke , ASANO, Satoshi , NAGAKURA, Toshihiko
- 申请人： Kanto Denka Kogyo Co., Ltd. , SUMITOMO METAL MINING CO., LTD.
- 申请人地址： JP Tokyo 100-0005 3-2 Marunouchi 2-chome Chiyoda-ku; JP Tokyo 105-8716 11-3, Shimbashi 5-chome Minato-ku
- 代理机构： Plougmann Vingtoft a/s
- 优先权： JP2020175511 20201019
- 国际公布： WO2022085222 20220428
- 主分类号： C22B7/00
- IPC分类号： C22B7/00 ; C22B7/04 ; C22B26/12 ; C22B3/06 ; C22B3/44
摘要：
A method for recovering lithium from slag containing at least aluminum and lithium, the slag being provided by melting a lithium-ion secondary battery to be disposed of to obtain molten metal containing valuable metal and molten slag containing at least aluminum and lithium and separating the slag containing at least aluminum and lithium from the molten metal containing valuable metal. The condition of the melting of the lithium-ion secondary battery is adjusted such that the slag has an aluminum to lithium mass ratio, Al/Lo, of 6 or less. The method includes: contacting the slag with an aqueous liquid to obtain a leachate containing lithium leached from the slag; and contacting the leachate with a basic substance to cause unwanted metal contained in the leachate to precipitate in the form of a slightly soluble substance, followed by solid-liquid separation to obtain a purified solution having lithium dissolved therein.
IPC结构图谱:
| C | 化学；冶金 |
| --C22 | 冶金（铁的冶金入C21）；黑色或有色金属合金；合金或有色金属的处理 |
| ----C22B | 金属的生产或精炼；原材料的预处理 |
| ------C22B7/00 | 处理非矿石原材料（如废料）以生产有色金属或其化合物 |