Title:
METHOD FOR REMOVING COPPER FLUORIDE FROM BATTERY POWDER LEACHATE
Document Type and Number:
WIPO Patent Application WO/2023/029575
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for removing copper fluoride from a battery powder leachate. The method comprises: roasting a battery powder, then washing with an alcohol solution; adding an acid solution to the alcohol-washed battery powder for leaching, so as to obtain a leachate; adding aluminum powder into the leachate for reaction; performing solid-liquid separation to obtain a filtrate and a copper fluoride slag; adding an ammonium salt into the filtrate to adjust the pH; separating to obtain an aluminum-removed solution and an aluminum hydroxide precipitate; and heating to remove ammonia from the aluminum-removed solution. The battery powder of the present invention still has remaining fluorine impurities after being roasted. Thus, by means of using an alcohol solution to wash away part of the fluorine impurities and then adding aluminum powder is to react with the fluorine to obtain insoluble aluminum fluoride, a dual defluorination effect is achieved, and the added aluminum powder can reduce the copper in the leachate, thereby allowing better defluorination. Adding aluminum also achieves copper reduction in the leachate. The process for removing copper fluoride of the present invention has a high removal rate and simple steps for removing copper fluoride.
Inventors:
YU HAIJUN (CN)
ZHONG YINGSHENG (CN)
LI AIXIA (CN)
XIE YINGHAO (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
ZHONG YINGSHENG (CN)
LI AIXIA (CN)
XIE YINGHAO (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2022/092493
Publication Date:
March 09, 2023
Filing Date:
May 12, 2022
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
International Classes:
C22B7/00; H01M10/54
Domestic Patent References:
| WO2021125150A1 | 2021-06-24 |
Foreign References:
| CN113802006A | 2021-12-17 | |||
| CN111392750A | 2020-07-10 | |||
| CN110165324A | 2019-08-23 | |||
| CN111961839A | 2020-11-20 | |||
| CN112853120A | 2021-05-28 | |||
| CN110112481A | 2019-08-09 | |||
| CN110396607A | 2019-11-01 | |||
| US20160013474A1 | 2016-01-14 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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