Patent ID: 7906005
Filing Date: 2011-03-15
Classification: C01B,C01D,C25B

Abstract:
1. A method of manufacturing a sodium bleach and an alkali metal hydroxide solution comprising potassium hydroxide, said method comprising the steps of: providing an aqueous solution of a chloride salt comprising potassium chloride; precipitating out impurities from said aqueous solution of said chloride salt by adding at least one of a barium or calcium chemical to form a precipitated aqueous solution; secondary purification of said precipitated aqueous solution by purifying said precipitated aqueous solution through an ion exchange unit to form a secondary precipitated aqueous solution; electrolyzing said secondary precipitated aqueous solution to collect chlorine gas at an anode and to collect hydrogen gas at a cathode, and to form an aqueous alkali metal hydroxide solution; pumping the chlorine gas to a dechlorinator and cooling said chlorine gas to form cooled chlorine gas; removing brine condensate from said cooled chlorine gas to form dried chlorine gas; pumping said dried chlorine gas to a hypo system to be mixed with stored sodium hydroxide, wherein said hypo system comprises a plate exchanger with cooling water; and combining said dried chlorine gas with said stored sodium hydroxide to form a sodium bleach.