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
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[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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