Plural zone process for the preparation of chlorine dioxide

Details Plural zone process for the preparation of chlorine dioxide Plural zone process for the preparation of chlorine dioxide

1982-01-11

1983-08-02

Hearn, Brian E.

Chemistry of inorganic compounds

Halogen or compound thereof

Chlorine dioxide

C01B 1102

Patent

active

043965920

ABSTRACT:
A process for the production of chlorine dioxide by the reaction of an alkali metal chlorate and hydrochloric acid in aqueous solution at temperatures of from about 35.degree. to about 70.degree. C. wherein the chlorate and the hydrochloric acid are introduced into a first reaction zone (the primary reactor) and after a residence time of two to ten minutes the reactants are fed through a system of reaction zones (secondary reactors) filled and emptied in sequence, the temperature of the reaction mixture in each secondary reactor being equal to or at most 15.degree. C. above that in the primary reactor, the residence time in each secondary reactor being from 20 to 40 minutes, the process permitting the use of less expensive reactor materials, such as polyvinyl chloride, with consequent savings in the cost of the reactors so employed.

REFERENCES:
patent: 2484402 (1949-10-01), Day
patent: 2664341 (1953-12-01), Kesting
patent: 4234446 (1980-11-01), Ramras
Foerst, Ed., Ullmanns Encyklopadie der technischen Chemie 3rd Ed., vol. 5, Urban, Munchen, W. Germany pp. 552, 553.

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