公开(公告)号：US20240026494A1

公开(公告)日：2024-01-25

申请号：US18255166

申请日：2021-12-09

Applicant: SUNRESIN NEW MATERIALS CO. LTD.

Inventor： Suidang LI ,  Hudao YAN ,  Jia YU ,  Lili FAN ,  Fumin GUO ,  Junlin GAO ,  Weiqiang LYU ,  Yuyun WEI ,  Qiong LIU ,  Xiaokang KOU

IPC: C22B26/12 ,  C22B7/00

CPC classification number: C22B26/12 ,  C22B7/006

Abstract: A method for recovering lithium from a lithium precipitation mother liquor, the method using the following cycle steps including adsorption, displacement, desorption and transformation: a. mounting a lithium-sodium separation resin in a resin column, and adding the lithium precipitation mother liquor to the resin column for adsorption, wherein the adsorption rate can reach 90% or more; b. after adsorption, washing the resin with water, displacing the resin with a lithium-salt-containing solution to wash out residual sodium from the resin; c. after displacement, desorbing the resin by means of an acid solution to obtain a solution with a high lithium content and a low sodium content, which solution has passed desorption criteria; and d. after desorption, carrying out reverse transformation on the resin by means of a transformation solution in order to ensure that no bubbles appear and then reduce the adsorption effect during the adsorption process. During the cycle, the lithium in the lithium precipitation mother liquor is separated from the solution with a high lithium-to-sodium ratio to obtain the solution with the high lithium-to-sodium ratio.