Process for the production of chlorine dioxide

Details Process for the production of chlorine dioxide Process for the production of chlorine dioxide

C - Chemistry, Metallurgy

01

B

23/147

C01B 11/02 (2006.01)

Patent

CA 2038184

ABSTRACT A process for the production of chlorine dioxide by reacting in a reaction vessel an alkali metal chlorate, mineral acid and a reducing agent in such proportions that chlorine dioxide is produced in a reaction medium which is maintained at a temperature of from about 50 °C to about 100 °C and at an acidity within a range of from about 2 to about 11 N and which is subjected to sub atmospheric pres- sure sufficient for evaporating water. A mixture of chlo- rine dioxide and water vapour is withdrawn from an eva- poration zone in the reaction vessel, and alkali metal sulfate is precipitated in a crystallization zone in the reaction vessel. Straight chained alcohols with the formula CH2OH(CHOH)nCH2OH where n = 0 - 5, are used as reducing agents. Preferred reducing agents consist of glycol or glycerol. The reaction may also be performed in the pre- sence of a catalyst.

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