Process for removal of alkali metal chlorate from alkali metal c

Details Process for removal of alkali metal chlorate from alkali metal c Process for removal of alkali metal chlorate from alkali metal c

1985-03-29

1986-09-02

Castel, Benoit

Liquid purification or separation

Processes

Chemical treatment

210754, 210757, 204 98, 423351, 423479, 423481, C02F 170

Patent

active

046094725

ABSTRACT:
A process for removing chlorate ions from an impure alkali metal chloride brine removed from an electrolytic cell comprises acidifying the impure brine to a pH of less than about 2. The acidified brine is then reacted with a reducing portion of hydrazine hydrochloride.
The novel process rapidly reduces the chlorate ions in the absence of the formation of chlorine and chlorine dioxide gases and with the production of nitrogen gas as a product.

REFERENCES:
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patent: 4268486 (1981-05-01), Noack et al.
patent: 4397720 (1983-08-01), Moore et al.
patent: 4443307 (1984-04-01), Moore et al.
patent: 4481088 (1984-11-01), Moore et al.
Mellor, J. W.; "A Comprehensive Treatise on Inorganic & Theoretical Chemistry", vol. VIII, pp. 313, 314 & 321 (1947).
Clark, C. C., Hydrazine, p. 13, Mathieson Chemical Corporation, Baltimore, Maryland, 1953.

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