C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/52 (2006.01) B01D 43/00 (2006.01) C01D 7/26 (2006.01) C01D 7/30 (2006.01)
Patent
CA 2527825
The invention provides a method for reducing bromine levels in brine solutions such as potassium chloride brine solutions. Bromide in solution is converted to bromine-containing compound by the addition of an oxidant such as sodium hypochlorite. The bromine-containing compound is precipitated by the addition of a metal cation such as magnesium under conditions of basic pH. The process is pH dependent such that the most efficient removal of bromine is achieved at a sodium hydroxide concentration of 90 - 200 mM. The pH optimum is also temperature dependent such that increased temperature lowers the optimal pH for bromide removal. The invention further provides a bromine-reduced potassium chloride product, suitable for uses in industrial applications. By the method of the invention bromine levels in a potassium chloride feed stock can be reduced by 97% or more.
Liebe Harald R.
Schultz Murray
Ziegenbalg Gerald
Macpherson Leslie & Tyerman Llp
The Mosaic Company
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