Process for the production of chlorine dioxide

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

1989-10-26

1991-01-22

Russel, Jeffrey E.

Chemistry of inorganic compounds

Halogen or compound thereof

Chlorine dioxide

C01B 1102

Patent

active

049869736

ABSTRACT:
A process for producing 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 maintained at a temperature of from about 50.degree. C. to about 100.degree. C. and at an acidity within a range of from about 2 to about 11 N. The reaction medium is subjected to subatmospheric pressure sufficient for evaporating water, a mixture of chlorine dioxide and water vapor being withdrawn from an evaporation zone in the reaction vessel and alkali metal sulfate being precipitated in a crystallization zone in the reaction vessel. A mixture of formaldehyde and methanol is used as reducing agent.

REFERENCES:
patent: 2936219 (1960-05-01), Rapson
patent: 3563702 (1971-02-01), Partridge et al.
patent: 3864456 (1975-02-01), Winfield et al.
patent: 4081520 (1978-03-01), Swindells et al.
patent: 4115217 (1978-09-01), Larsson et al.
patent: 4770868 (1988-09-01), Norell

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