Method for separating and recovering lithium and cobalt from lithium ion cell

A lithium-ion battery, separation and recovery technology, applied in chemical instruments and methods, cobalt compounds, process efficiency improvement and other directions, can solve the problems of high energy consumption, high price, increase the cost of cobalt acetate, etc., to achieve low energy consumption, The effect of high recovery rate and lower production cost

Inactive Publication Date: 2010-02-24
DALIAN UNIV OF TECH
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Problems solved by technology

[0007] At present, the preparation method of cobalt acetate is mainly to react metal cobalt with acetic acid under certain conditions. Because the price of cobalt is expensive, the cost of cobalt acetate is increased, and the energy consumption is large.

Method used

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Embodiment 1

[0020] Dissolve the current collector of the battery with NaOH, so that the aluminum is converted to NaAlO 2 into solution in the form of LiCoO 2 Insoluble in alkali, filtered. The filter residue was soaked in 4mol / L excess hydrochloric acid at 60°C to fully dissolve it, and then filtered. Use 5mol / L NaOH solution to adjust the pH value of the filtrate to be greater than 11, and then use ultrafiltration membrane elements to separate Co(OH) 2 Precipitation and Li + of feed liquid. With Mg(NO 3 ) 2 .6H 2 O, MnCl 2 .4H 2 O, LiOH.H 2 O as raw material, LiMg synthesized by soft chemistry 0.5 mn 1.5 o 4 Afterwards, use 1mol / L hydrochloric acid elution to obtain ion sieve, handle Li + feed liquid, for Li + Selective adsorption is carried out until the Li in the solution separated by the ultrafiltration membrane element + The solution does not change anymore, and the separation is obtained by adsorbing Li + The ion sieve, and then use 1mol / L hydrochloric acid to absorb...

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Abstract

The invention discloses a method for separating and recovering lithium and cobalt from a lithium ion cell, belonging to the technical field of environmental resource recovery. The method is characterized in that cobalt ions in acidolysis solution of a processed waste lithium ion battery are deposited with alkali to obtain cobalt hydroxide, and the cobalt hydroxide reacts with acetic acid to generate cobalt acetate, thereby lowering the production cost of the cobalt acetate. Cheap lithium, magnesium and manganese are acid-washed to be used as a lithium ion adsorbing agent and is combined with an immersed ultrafiltration membrane component, filtrate depositing cobalt is embedded into a gap of an ion sieve crystal lattice for eluting Li<+> by acid after reaching the maximum absorption amountso as to achieve the purpose of separating and recovering lithium, and an obtained ionic sieve after the acid washing can also be recycled. The method has simple process, high recovery rate and environment protection.

Description

technical field [0001] The invention belongs to the technical field of environmental resource recovery, relates to a method for recovering lithium and cobalt from lithium-ion batteries, and in particular to a method for separating lithium and cobalt in waste lithium-ion batteries by ion sieve method and separating them with lithium chloride and cobalt respectively. Method for recovery of cobalt acetate form. technical background [0002] In recent years, the output of mobile communication equipment and portable measuring instruments represented by notebook computers and mobile phones has increased rapidly. Light weight and small size is the current development trend of these machines. Lithium-ion secondary batteries are the preferred high-energy power batteries for these portable devices. However, in recent years, with the rapid increase in the use of lithium-ion batteries, the number of scrapped lithium-ion batteries will also increase significantly year by year. In addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/12C22B23/00C01G51/00
CPCY02P10/20
Inventor 马伟王刃田丽妍王禄秦承欢程子洪杨港
Owner DALIAN UNIV OF TECH
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