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Method for separating manganese from ternary lithium ion battery positive electrode leachate

A lithium-ion battery and leaching solution technology, applied in secondary batteries, battery recycling, circuits, etc., can solve the problems of less separation research, large space occupation, and long process flow, and achieve simple equipment requirements, small changes and differences, and shorten recycling The effect of the process

Pending Publication Date: 2021-11-02
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its technical research mainly focuses on the separation and reduction technology of positive electrode materials. There are few studies on the separation of mixed solutions. Generally, the separation is mainly through subsequent extraction of mixed solutions. However, the extraction process needs to be equipped with corresponding extraction organic phases and other corresponding conditions. Some cobalt and nickel will also be lost during impurity removal and purification, and sulfide precipitation will generate some insoluble nickel sulfide cobalt slag, which needs to be comprehensively extracted by hydrometallurgical process again. The whole process is long, costly and takes up space. Big

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  • Method for separating manganese from ternary lithium ion battery positive electrode leachate
  • Method for separating manganese from ternary lithium ion battery positive electrode leachate
  • Method for separating manganese from ternary lithium ion battery positive electrode leachate

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Embodiment 1

[0044] The method provided in this embodiment specifically includes the following steps:

[0045] A composite oxidant consisting of potassium permanganate and sodium persulfate is added to the positive electrode leaching solution of the above-mentioned lithium ion battery to make the Mn 2+ Oxidation reaction occurs, and the MnO 2 form precipitation, remove the manganese element in the leaching solution, and analyze and detect the residual manganese, cobalt and nickel content in the supernatant.

[0046] Wherein, the addition amount of the composite additive is 1.05 times of the theoretical value of the molar amount of potassium permanganate, and the molar ratio of potassium permanganate and sodium persulfate in the composite additive is 9:1.

[0047] During the oxidation reaction, the pH of the solution was 5, the temperature was 30° C., and the reaction time was 20 minutes.

Embodiment 2

[0049] The method provided in this embodiment specifically includes the following steps:

[0050] A composite oxidant consisting of potassium permanganate and sodium persulfate is added to the positive electrode leaching solution of the above-mentioned lithium ion battery to make the Mn 2+ Oxidation reaction occurs, and the MnO 2 form precipitation, remove the manganese element in the leaching solution, and analyze and detect the residual manganese, cobalt and nickel content in the supernatant.

[0051] Wherein, the addition amount of the composite additive is 1.05 times of the theoretical value of the molar amount of potassium permanganate, and the molar ratio of potassium permanganate and sodium persulfate in the composite additive is 9:1.

[0052] During the oxidation reaction, the pH of the solution was 5.5, the temperature was 30° C., and the reaction time was 20 minutes.

Embodiment 3

[0054] The method provided in this embodiment specifically includes the following steps:

[0055] A composite oxidant consisting of potassium permanganate and sodium persulfate is added to the positive electrode leaching solution of the above-mentioned lithium ion battery to make the Mn 2+ Oxidation reaction occurs, and the MnO 2 form precipitation, remove the manganese element in the leaching solution, and analyze and detect the residual manganese, cobalt and nickel content in the supernatant.

[0056] Wherein, the addition amount of the composite additive is 0.85 times of the theoretical value of the molar amount of potassium permanganate, and the molar ratio of potassium permanganate and sodium persulfate in the composite additive is 9:1.

[0057] During the oxidation reaction, the pH of the solution was 5.3, the temperature was 30° C., and the reaction time was 20 minutes.

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Abstract

The invention provides a method for separating manganese from a ternary lithium ion battery positive electrode leachate, which comprises the following steps: adding a composite oxidant into a ternary lithium ion battery positive electrode material leachate, carrying out oxidation reaction on Mn < 2 + >, precipitating in the form of MnO2, and removing a manganese element in the leachate, wherein the composite oxidant is composed of permanganate and persulfate, and the molar ratio of the permanganate to the persulfate is (8.5-9.5): 1. According to the method, the recovery process of the battery positive electrode material is shortened, the product yield is high, the removal rate of manganese is as high as 98.733%, and the loss rates of cobalt and nickel are as low as 2.44% and 0.48% respectively. The impurity content of the separated MnO2 or MnSO4 is low, the required equipment requirement is simple, the experiment condition is mild, the normal-temperature reaction can be adopted, and the method has good environmental protection and economic benefits.

Description

technical field [0001] The invention relates to the technical field of recycling waste batteries, in particular to a method for separating manganese in the leach solution of the positive electrode of a ternary lithium ion battery. Background technique [0002] Ternary lithium-ion batteries are widely used in communication power supplies and power batteries, especially in the field of new energy vehicles, due to their high energy density, safety and good cycle performance. Lithium-ion batteries generally have a service life of three years. With the rapid development of the new energy industry, the number of waste lithium-ion batteries has increased sharply. If they are not properly disposed of, they will have adverse effects on the environment and water resources, thereby affecting human health. On the other hand, waste lithium batteries are rich in rare and precious metals such as cobalt and nickel, which are important secondary resources, and their comprehensive recycling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B47/00H01M10/54H01M10/0525
CPCC22B7/007C22B23/0461C22B47/00H01M10/54H01M10/0525Y02W30/84Y02E60/10Y02P10/20
Inventor 吴浩郑江峰高琦黄仁忠王苗张颖
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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