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Method for preparing lithium hydroxide from waste lithium-ion batteries

A lithium-ion battery, lithium hydroxide technology, applied in the direction of lithium oxide;/hydroxide, etc., can solve the problems of lack of process conditions and process parameters of waste lithium-ion battery, achieve high comprehensive utilization rate, low environmental protection pressure, short process effect

Inactive Publication Date: 2019-05-17
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

Although existing patents and periodicals and other documents disclose or report the production method of lithium hydroxide, its raw material refers to ore or brine, which lacks the detailed process conditions and conditions for the direct one-step leaching of waste lithium-ion batteries as raw materials to prepare lithium hydroxide. Description of process parameters; at the same time, existing patents lack the process conditions and process parameters for the selective leaching of nickel, cobalt and lithium from waste lithium-ion batteries

Method used

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  • Method for preparing lithium hydroxide from waste lithium-ion batteries
  • Method for preparing lithium hydroxide from waste lithium-ion batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: A kind of method utilizing waste lithium ion battery to prepare lithium hydroxide

[0033] Include the following steps in order:

[0034] Take 50g of ternary waste lithium battery cell powder, add 4mol / l sulfuric acid, stir and react at 40°C for 90min, then filter to obtain leaching residue and leaching solution containing nickel-cobalt-manganese-lithium (leaching rate see attached figure 1 ); add sodium hydroxide to the leaching solution, adjust the pH ≈ 11~12, and filter to obtain neutralization slag and lithium sulfate solution.

[0035] According to 0.8 times of the molar theoretical amount of lithium ions, add sodium hydroxide to the purified lithium sulfate solution to obtain sodium sulfate crystals and lithium hydroxide solution; continue to evaporate the lithium hydroxide solution until its solid content reaches 45 to 50 %, cooling to obtain the crude product of lithium hydroxide, and then by means of dissolution-recrystallization, the battery-gra...

Embodiment 2

[0037] Embodiment 2: A kind of method utilizing waste lithium ion battery to prepare lithium ion sieve

[0038] Include the following steps in order:

[0039] Take 50g of ternary waste lithium battery cell powder, add 4mol / l sulfuric acid, stir and react at 60°C for 120min, then filter to obtain leaching residue and leaching solution containing nickel-cobalt-manganese-lithium (leaching rate see attached figure 1 ); add sodium hydroxide to the leaching solution, adjust pH ≈ 11-12, and filter to obtain neutralization slag and lithium sulfate solution.

[0040] According to 1 time of the molar theoretical amount of lithium ions, add sodium hydroxide to the purified lithium sulfate solution, and cool to -8°C under stirring conditions to obtain sodium sulfate crystals and lithium hydroxide solution; continue to evaporate the lithium hydroxide solution, Until its solid content reaches 45-50%, cool to obtain a crude product of lithium hydroxide, and then by means of dissolution-recr...

Embodiment 3

[0041] Example 3: A method for preparing lithium-ion sieves using waste lithium-ion batteries

[0042] Include the following steps in order:

[0043] Take 50g of ternary waste lithium battery cell powder, add 4mol / l sulfuric acid, stir and react at 80°C for 60min, then filter to obtain leaching residue and leaching solution containing nickel-cobalt-manganese-lithium (leaching rate see attached figure 1 ); add sodium hydroxide to the leaching solution, adjust pH ≈ 11-12, and filter to obtain neutralization slag and lithium sulfate solution.

[0044] According to 1.1 times of the molar theoretical amount of lithium ions, sodium hydroxide is added to the purified lithium sulfate solution, cooled to -5°C under stirring conditions, to obtain sodium sulfate crystals and lithium hydroxide solution; continue to evaporate the lithium hydroxide solution, Until its solid content reaches 45-50%, cooling to obtain a crude lithium hydroxide product, and then by means of dissolution-recryst...

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Abstract

The invention discloses a method for preparing lithium hydroxide from waste lithium-ion batteries. The method is characterized by comprising the following steps: (1) sulfuric acid and waste lithium-ion battery cell powder react at 40-100 DEG C, thus lithium ions are fully leached, and filtering is conducted to obtain leaching slag and leachate containing nickel, cobalt, manganese and lithium; (2)alkali is added to adjust the pH value of the leachate to be 11-12, precipitation is removed, and a lithium sulfate solution is obtained; and (3) according to the molar theoretical amount of the lithium ions, a sodium hydroxide solution is added into the lithium sulphate solution to obtain a mixed solution, the mixed solution is cooled, sodium sulfate crystals are separated out, lithium hydroxidepurification liquid is obtained, and then evaporative recrystallization is conducted to obtain a lithium hydroxide product. The technological process is simple, when the waste lithium-ion batteries are recycled, the lithium element loss is less, and the lithium element is recovered to the maximum extent.

Description

technical field [0001] The invention relates to the field of recycling waste lithium ion batteries, in particular to a method for preparing lithium hydroxide by using waste lithium ion batteries. Background technique [0002] Lithium hydroxide is mainly used in lithium batteries, and is also used in the preparation of lithium salts and lithium-based greases, analytical reagents, photographic developers, and the preparation of metallic lithium, etc. It is widely used in metallurgy, petroleum, glass, ceramics and other industries. In recent years, with the rapid development of the new energy industry, high-nickel ternary lithium batteries have received more and more attention. As an important material for preparing high-nickel ternary lithium hydroxide, it has attracted the attention of many researchers. The preparation method of lithium hydroxide mainly comprises the following several at present: [0003] (1) Preparation of lithium hydroxide from ore: mainly including limest...

Claims

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Application Information

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IPC IPC(8): C01D15/02
Inventor 王光辉高洁肇巍王梦谢宇充徐燕李仕红刘刚锋
Owner 天齐锂业资源循环技术研发(江苏)有限公司
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