Process for the production of chlorine dioxide

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

1990-09-04

1992-02-25

Niebling, John

Chemistry of inorganic compounds

Halogen or compound thereof

Chlorine dioxide

162 6, 162 67, C01B 1102, D21C 912

Patent

active

050911660

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.degree. C. to about 100.degree. C. and at an acidity within a range of from about 2 to about 5N. The reaction medium is subjected to subatmospheric pressure sufficient for evaporating water, a mixture of chlorine dioxide, oxygen and water vapor being withdrawn from an evaporation zone in the reaction vessel, and alkali metal sulfate being precipitated in a crystallization zone in the reaction vessel. As the reducing agent hydrogen peroxide is used.

REFERENCES:
patent: 2332181 (1943-10-01), Sgule
patent: 2768877 (1956-10-01), Williamson et al.
patent: 2833624 (1958-05-01), Sprauer
patent: 3563702 (1971-02-01), Partridge et al.
patent: 4081520 (1978-03-01), Swindells et al.
patent: 4298426 (1981-11-01), Torregrossa et al.
"Wasserstoffperoxid und seine Derivate, Chemie und Anwendungen", Weigert W. M. (Hrwg.), Heidelberg 1978.

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