Combined process for production of chlorine dioxide and sodium h

Details Combined process for production of chlorine dioxide and sodium h Combined process for production of chlorine dioxide and sodium h

1988-07-27

1989-02-21

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204101, 204103, 423478, C15B 114

Patent

active

048062154

ABSTRACT:
A hydrochloric acid-based chlorine dioxide generating process is integrated with an electrolytic process for sodium hydroxide production. Generator liquor in the form of a sodium chloride-enriched solution from the chlorine dioxide generator is passed to the central compartment of a three-compartment cell. Hydrogen ions formed in the anode compartment of the three-compartment cell migrate through a cation-exchange membrane to the central compartment to form hydrochloric acid with the sodium chloride solution while sodium ions migrate through a further cation-exchange membrane to form sodium hydroxide with hydroxyl ions produced in the cathode compartment of the three-compartment cell. The acidified generator liquor containing the hydrochloric acid formed in the central compartment is forwarded to the chlorine dioxide generator to provide half the acid requirement therefor.

REFERENCES:
patent: 4129484 (1978-12-01), Larsson

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