Method and apparatus for chlorine dioxide manufacture

Details Method and apparatus for chlorine dioxide manufacture Method and apparatus for chlorine dioxide manufacture

1989-09-14

1992-05-05

Niebling, John

Chemistry of inorganic compounds

Halogen or compound thereof

Ternary compound

423240S, 423241, 423477, 25218723, C01B 1102, C01B 1110

Patent

active

051105802

ABSTRACT:
A method and apparatus for the generation, use, and disposal of chlorine dioxide is disclosed. A solid sodium chlorite composition having impurities, at least one of which is sodium hydroxide, is contacted with an agent to consume essentially all of the sodium hydroxide. Chlorine dioxide gas is then generated by contacting the resultant composition with chlorine in a humidified inert carrier gas. The resultant chlorine dioxide gas mixture may then be treated to remove chlorine gas present therein by contacting the same with sodalime in particulate form. After using the chlorine dioxide gas mixture in the desired manner, chlorine dioxide present in the spent effluent gas may be substantially removed via the introduction of the effluent gas into an aqueous solution of sodium thiosulfate having a sufficient amount of an inorganic base to maintain the alkalinity of the solution during consumption of thiosulfate by chlorine dioxide.

REFERENCES:
patent: 2309457 (1943-01-01), Hutchinson et al.
patent: 2332180 (1943-10-01), Soule
patent: 3101248 (1963-08-01), Hirschberg et al.
patent: 3450493 (1969-06-01), DuBellay et al.
patent: 4250144 (1981-02-01), Ratigan
patent: 4740363 (1988-04-01), Hirai et al.

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