Safe production of chlorine dioxide in a pressurized gaseous sta

Details Safe production of chlorine dioxide in a pressurized gaseous sta Safe production of chlorine dioxide in a pressurized gaseous sta

1987-12-07

1990-02-27

Russel, Jeffrey E.

Chemistry of inorganic compounds

Halogen or compound thereof

Chlorine dioxide

C01B 1102

Patent

active

049044613

ABSTRACT:
A safe continuous process is disclosed for generating superatmospheric pressure mixtures of chlorine and chlorine dioxide, wherein the chlorine dioxide is generated in situ by chemically reducing inorganic chlorates in aqueous sulfuric acid solutions, and most of the chlorine is supplied from a high-pressure external source. The mixed gaseous products contain Cl.sub.2 and ClO.sub.2 in volumetric Cl.sub.2 /ClO.sub.2 ratios of at least 10/1, and preferably between about 11/1 and 99/1, and are ideally suited for direct use in various industrial treatments, notably in the purification and bleaching of wood pulp and the like.

REFERENCES:
patent: 3524728 (1970-08-01), Westerlund
patent: 3864457 (1975-02-01), Hoekje et al.
patent: 3950500 (1976-04-01), Jaszka
patent: 4496534 (1985-01-01), Delaney et al.
patent: 4508537 (1985-04-01), Fenton et al.
patent: 4534952 (1985-08-01), Rapson et al.

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