METHOD OF BROMINE EXTRACTION FROM NATURAL CHLORIDE WATER WITH RECEIVING BROMIDE CONCENTRATE Russian patent published in 2009 - IPC C25B1/24 

FIELD: chemistry.

SUBSTANCE: invention relates to technology of inorganic substances and bromide extraction from natural chloride waters and brines with receiving bromide concentrate. The method includes oxygenising bromide till elementary bromine appears on anode of two compartment cell, divided by cation-exchange membrane, whereupon bromine is separated from anolyte, bromine is extracted from contact carrier phase with back catholyte with further bromine reduction on cathode with receiving bromide salt concentration. Initial bromine-containing chloride solution is acidified by 4-7 g/l of hydrochloric acid. The portion of bromine containing chloride solution is acidified and after anode oxidation is combined with the main mass of the solution containing bromine. The chloride solution to 10 vol.% is delivered to anode chamber. Ferric bromide is added in catholyte till total concentration of ferrum is 5-6 g/l. Ferric bromide is regenerated and returned to the process.

EFFECT: enhancement of security when receiving bromide concentrate within processing of natural brome-containing chloride waters, prevention of toxic chlorine supply to production, transportation of non-toxic bromide salt concentrate to consumers, decrease of reactant and energy consumptions.

5 cl, 4 dwg, 3 ex