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A kind of comprehensive recycling method of waste lithium ion battery

A technology for lithium-ion batteries and waste lithium batteries, which is applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problem of not being able to achieve high-efficiency and prioritizing lithium extraction.

Active Publication Date: 2021-09-10
天齐锂业资源循环技术研发(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the technology disclosed in the existing patents, it is impossible to realize the process of efficiently and preferentially extracting lithium from waste lithium-ion batteries as raw materials, and simultaneously preparing nickel-cobalt-manganese sulfate products

Method used

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  • A kind of comprehensive recycling method of waste lithium ion battery
  • A kind of comprehensive recycling method of waste lithium ion battery
  • A kind of comprehensive recycling method of waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Get ternary waste lithium battery powder 50g, add 4mol / L sulfuric acid, add 10g additive potassium permanganate (KMnO 4 ), under the condition of 20 ℃, after stirring and reacting for 2h, filter to obtain the mixed solution and leaching slag containing nickel sulfate, cobalt sulfate, manganese sulfate and lithium sulfate in the filtrate, and the leaching effect is as follows: figure 1 , 2 and 3. Adjust the pH of the filtrate to ≈5.5, remove impurities, and obtain a high-concentration lithium-containing solution. The lithium-containing solution is subjected to a lithium precipitation process using sodium carbonate to obtain a pure lithium carbonate product.

[0036]The leaching residue is reduced and leached with sulfuric acid and hydrogen peroxide, the sulfuric acid is 1.1 times the theoretical amount, and the hydrogen peroxide is 1.4 times the theoretical amount. Under the condition of 60 ° C, a high-concentration mixed solution containing nickel sulfate, cobalt sulfa...

Embodiment 2

[0040] Take 50g of ternary waste lithium battery cell powder, add 4mol / L sulfuric acid, add 30g of additive KMnO 4 , under the condition of 50 ℃, after stirring and reacting for 4 hours, filter to obtain a solution containing nickel-cobalt-lithium and leaching residue, the leaching effect is shown in figure 1 , 2 And 3, adjust the filtrate pH ≈ 5-5.5, remove impurities, obtain a high-concentration lithium-containing solution, and then use sodium carbonate to perform a lithium-precipitation process on the lithium-containing solution to obtain a lithium carbonate product.

[0041] The leaching residue is reduced and leached with sulfuric acid and hydrogen peroxide. The sulfuric acid is 1.05 times the theoretical amount, and the hydrogen peroxide is 1.3 times the theoretical amount. At 60°C, a high-concentration lithium-containing solution is obtained, wherein nickel: 61.75g / L, cobalt: 23.75g / L, manganese: 35.15g / L. Adjust the pH of the lithium-containing solution to ≈4.5, and...

Embodiment 3

[0045] Take 50g of ternary waste lithium battery cell powder, add 4mol / L sulfuric acid, add additive KMnO 4 40g, under the condition of 80 ℃, after stirring and reacting for 12h, filter to obtain a solution containing nickel lithium manganese (leaching effect see figure 1 , 2 , 3), adjust the filtrate pH ≈ 5-5.5, remove impurities, obtain a high-concentration lithium-containing solution, and then perform a lithium precipitation process to obtain a lithium carbonate product

[0046] The leaching residue is reduced and leached with sulfuric acid and hydrogen peroxide. The sulfuric acid is 0.95 times the theoretical amount, and the hydrogen peroxide is 1.1 times the theoretical amount. Under the condition of 60 ° C, a high-concentration nickel-cobalt-manganese-containing solution is obtained, nickel: 55.25g / L, cobalt: 21.25g / L, manganese: 31.45g / L, adjust the pH of the solution to ≈4.5, and use 25% P204 to extract and remove impurities after nickel soap. The extraction stage is...

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Abstract

The invention provides a comprehensive recycling method for waste lithium ion batteries, comprising: using sulfuric acid and potassium permanganate to leach ternary waste lithium battery cell powder for the first time to obtain a first leaching solution and a first leaching slag; The first leaching solution sinks lithium to obtain lithium carbonate; the first leaching residue is selectively reduced and leached with hydrogen peroxide and sulfuric acid to obtain the second leaching solution and the second leaching residue; the pH of the second leaching solution is adjusted to 4.2-4.5, and the second leaching solution is treated with P204 Extract to obtain P204 raffinate and P204 loaded organic phase; back-extract P204 loaded organic phase with sulfuric acid, evaporate and crystallize to obtain manganese sulfate; adjust the pH value of P204 raffinate to 4.5‑5, and use C272 to P204 Extract to obtain C272 extract and C272 loaded organic phase; use sulfuric acid to extract cobalt sulfate solution on C272 loaded organic phase, evaporate and crystallize to obtain battery grade cobalt sulfate; adjust the pH value of C272 raffinate to 5-5.5, The extract is extracted with P507 to obtain a P507-loaded organic phase, and the P507-loaded organic phase is back-extracted with sulfuric acid to obtain a nickel sulfate solution, which is evaporated and crystallized to obtain nickel sulfate.

Description

technical field [0001] The invention belongs to a comprehensive recovery method of waste lithium ion batteries, and more specifically relates to a comprehensive recovery method of waste lithium ion batteries. Background technique [0002] Cobalt sulfate is mainly used in lithium batteries, and is also used in electroplating, ceramic glazes and paint drier, production of cobalt-containing pigments, catalysts, analytical reagents, feed additives, tire adhesives and other cobalt products; nickel sulfate is mainly used in lithium batteries , electroplating and catalyst industries; lithium carbonate is mainly used in lithium batteries, but also in the preparation of catalysts for chemical reactions, semiconductors, ceramics, television, medicine and atomic energy industries. [0003] In recent years, with the support of national policies, the new energy industry has developed rapidly, but more and more waste lithium-ion batteries will be scrapped. Waste lithium-ion batteries cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C22B7/00C22B26/12C22B23/00C22B47/00
CPCC22B7/007C22B23/043C22B26/12C22B47/00C22B3/3842C22B3/3844H01M10/54Y02W30/84Y02P10/20
Inventor 高洁王光辉肇巍王梦王蒙蒙谢宇充徐燕何霞
Owner 天齐锂业资源循环技术研发(江苏)有限公司
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