Method of producing chlorine dioxide from hydrogen chloride

Details Method of producing chlorine dioxide from hydrogen chloride Method of producing chlorine dioxide from hydrogen chloride

C - Chemistry, Metallurgy

25

B

204/65

C25B 1/26 (2006.01) C01B 11/02 (2006.01) C25B 1/46 (2006.01)

Patent

CA 1074726

` Case 1559/DCS/db METHOD OF PRODUCING CHLORINE DIOXIDE FROM HYDROGEN CHLORIDE ABSTRACT This application relates to a process of producing chlorine dioxide which utilizes hydrochloric acid as a feed material. The process may be operated to have substantially only chlorine dioxide and hydrogen as products. The process utilizes an electrolytic cell to produce an alkali metal hydroxide, chlorine and hydrogen from an aqueous solution of alkali metal chlorides. The alkali metal hydroxide and chlorine that are produced arc reacted to form an alkali metal hypochlorite, which in turn is converted into an alkali metal chlorate. The chlorine is reacted with hydrochloric acid to produce chlorine dioxide, chlorine and an aqueous solution of alkali metal chloride. The chlorine dioxide is recovered. The chlorine produced may be used in the prior step by reaction with alkali metal hydroxide or may be burned with hydrogen to produce HCl and utilized in the process. The aqueous solution of alkali metal chloride is recycled used as a feed material for the electrolytic cell. - 1 -

221881

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