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

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...