公开(公告)号：US20240124336A1

公开(公告)日：2024-04-18

申请号：US18043670

申请日：2022-08-08

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xuehua RUAN ,  Xiaobin JIANG ,  Gaohong HE ,  Xiaoming YAN ,  Wanting CHEN ,  Xuemei WU ,  Yan DAI ,  Tiantian LI ,  Miao YU

IPC: C02F1/469 ,  C02F1/42

CPC classification number: C02F1/4693 ,  C02F1/42 ,  C02F2101/10

Abstract: The present invention provides a high-efficient magnesium ion removal system for salt lake brine based on in situ alkali production using bipolar membrane electrochemical process, it is constructed with cathode, cathode cell, anode, anode cell, and anion exchange membranes, bipolar membranes, acid cells, alkali cells, mesh materials for precipitate aggregation, acid-washing cells. During the working stage, salt lake brine enters the alkali cell, in which magnesium ions react with hydroxide groups and generate precipitate in mesh materials for precipitate aggregation, meanwhile magnesium-removed salt lake brine is produced; pure water enters acid cell, in which hydrochloric acid is produced and then exported to acid-washing cell; the mesh materials for precipitate aggregation, after they are packed with magnesium hydroxide particles, would be periodically transferred into acid-washing cell, in which magnesium hydroxide would react with hydrochloric acid and generate magnesium chloride solution, and the mesh materials are recycled after regeneration for precipitate aggregation.