Method of recycling valuable metals in waste lithium cobalt oxide batteries through ion exchange method

An ion exchange method and a valuable metal technology, which is applied in the field of ion exchange method to recover valuable metals in waste lithium cobalt oxide batteries, can solve the problems of complicated metal separation process, difficult filtration by alkali leaching method, incomplete separation, etc. The process is short, the evaporative crystallization process is omitted, and the impurity removal time is short.

Inactive Publication Date: 2019-11-19
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkali leaching method is difficult to filter and the separation is incomplete. The valuable metal nickel lithium and cobalt manganese are separated in the solution recovery process, and the sulfide precipitation method, oxalic acid method, and phosphate method are used to separate the metals. The separation process is complicated, and the separated metals are entrained with each other.

Method used

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  • Method of recycling valuable metals in waste lithium cobalt oxide batteries through ion exchange method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Collect waste lithium cobaltate batteries, disassemble them manually, discharge them in 5% sodium chloride solution, and crush them mechanically. Weigh 1500g of anhydrous sodium sulfite and dissolve them for later use; add 15L of 1.8M sulfuric acid into the reactor and heat to 50-65°C ;Weigh 5kg of crushed waste lithium-ion battery powder and add it, stir at a low speed, slowly add sulfuric acid to adjust the pH value of the solution to about 1.0, add sodium sulfite solution after 10 minutes, react for 30-100 minutes after completion, and separate the solid and liquid;

[0023] Raise the temperature of the leaching solution to 80-90°C, stop heating, add 50g / L lithium hydroxide solution to adjust the pH value of the solution to 2.0, add 10g of cobalt powder, react for 15 minutes, add 100mL of 30% hydrogen peroxide, and react for 20 minutes, then add lithium hydroxide solution to adjust The pH value of the solution reaches 4.5, reacts for 30min, filters and washes;

[002...

Embodiment 2

[0027] Collect waste lithium cobalt oxide batteries, manually disassemble them, discharge them in 5% sodium chloride solution, and mechanically crush them. Add 15L of 2M sulfuric acid to the reactor, raise the temperature to 50-65°C, weigh 5kg of the crushed waste lithium-ion battery and add it, soak for 10min, stir at a low speed, measure a certain amount of 98% concentrated sulfuric acid, and slowly add it to the reaction vessel. Adjust the pH value of the solution to about 1.0, add 3.0L of 30% hydrogen peroxide, react for 30-100min after the dropwise addition, and filter;

[0028] Raise the temperature of the leaching solution to 85°C, add 50g / L lithium hydroxide solution to adjust the pH value of the solution to 1.8, add 12g of cobalt powder, react for 15 minutes, add 30% hydrogen peroxide 80mL, and react for about 20 minutes, then add 30g / L lithium hydroxide solution to adjust the solution pH value to 4.5, react for 30min, filter and wash;

[0029] The chelating resin D4...

Embodiment 3

[0032] Collect waste lithium cobalt oxide batteries, manually disassemble them, discharge them in 5% sodium chloride solution, and mechanically crush them. Add 15L of 2M sulfuric acid to the reactor, raise the temperature to 50-65°C, weigh 5kg of the crushed waste lithium-ion battery and add it, soak for 10min, stir at a low speed, measure a certain amount of 98% concentrated sulfuric acid, and slowly add it to the reaction vessel. Adjust the pH value of the solution to about 1.0, add 2.8L of 30% hydrogen peroxide, react for 30-100min after the dropwise addition, and filter;

[0033] Raise the temperature of the leaching solution to 85°C, add 50g / L cobalt hydroxide solution to adjust the pH value of the solution to 1.8, add 12g of cobalt powder, react for 15 minutes, add 30% hydrogen peroxide 80mL, and react for about 20 minutes, then add 35g / L cobalt hydroxide solution to adjust the solution pH value to 4.5, react for 30min, filter and wash;

[0034] Chelating resin D402 col...

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Abstract

The invention belongs to the technical field of the chemical industry and relates to a method of recycling valuable metals in waste lithium cobalt oxide batteries through the ion exchange method. Themethod comprises the steps of discharged crushing, peeling and leaching of the waste lithium cobalt oxide batteries, impurity removal of a leaching solution, adsorption and desorption of cobalt resinand preparation of lithium hydroxide. The method is simple and efficient. Through the method, the valuable metals in the waste lithium cobalt oxide batteries can be recycled easily in batches. Moreover, the method is simple, low in equipment requirement, easy to operate and high in recovery rate.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a method for recovering valuable metals in waste lithium cobalt oxide batteries by ion exchange. Background technique [0002] According to statistics, the domestic lithium battery market will still maintain a growth rate of 20-30% in the next few years, of which consumer electronics and power battery markets will be the main driving forces. Discarded mobile phones and power batteries and their disassembled batteries will not only It will have a bad impact on the environment and is also a waste of resources. The recycling of waste lithium batteries is becoming more and more important. According to the forecast of the International Energy Agency, by 2030, global sales of electric vehicles will increase from the current level of more than 2 million to 140 million. This means that the recycling of used lithium batteries will become a big global problem. By 2022, up to 262,0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B26/12H01M10/54
CPCC22B7/007C22B23/043C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 柴艮风曹笃盟张明兰王甲琴李兰兰陈天翼李伟王悦王国超郭培庆吴芳
Owner JINCHUAN GROUP LIMITED
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