Title: Method for removing ions of calcium and sulfuric acid radical from common salt brine and bittern
Application Number: 89105929 Application Date: 1989.06.17
Publication Number: 1039781 Publication Date: 1990.02.21
Approval Pub. Date: Granted Pub. Date: 1993.07.28
International Classifi-cation: C01D3/14
Applicant(s) Name: Zhangjiaba Salt Prodn. Chemical Plant, Zigong City Address:
Inventor(s) Name: Li Yufang, Shi Huimin
Attorney & Agent: ZHAN FUWU ZHAN ZUO
Abstract:
     The invention uses witherite powder as treating agent which reacts with crude salt solution or bittern at normal atmospheric temp. The two-stage treating technology and the cinder recovery process are used to remove the SO4-- and Ca . The purified salt solution or bittern can be used as material of soda industry and refining salt industry. Comparing with barium chloride-soda ash process and barium carbonate-soda ash process the cost is reduced respectively by 80.7% and 72.3%, the ratio of removing SO-- and Ca is respectively up to 99.3% and 92.8%.
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