Compositions – Oxidative bleachant – oxidant containing – or generative – Free halogen or oxy-halogen acid type
Patent
1974-10-21
1976-12-21
Sebastian, Leland A.
Compositions
Oxidative bleachant, oxidant containing, or generative
Free halogen or oxy-halogen acid type
8111, 423333, 423341, C11D 754
Patent
active
039987515
ABSTRACT:
There is disclosed a method for the preparation of an oxidant-containing solid which is useful as an antiseptic agent, bleaching agent, oxidizing agent, etc. The solid, which can be prepared in a varied degree of water solubility, is prepared by reacting, in aqueous solution an alkali metal silicate with an oxidant which can be hydrogen peroxide or an alkali metal hypohalite. When a hypohalite is used as the oxidant, the resultant solid can be prepared in a varied degree of water solubility. Typically, a solution of sodium silicate is admixed with a solution of sodium hypochlorite, resulting in the formation of a voluminous, white precipitate that can be separated by filtration, decanting and the like, to obtain a solid containing the hypochlorite. The water solubility of this solid can be readily controlled by progressive dehydration of the solid, resulting in increasing water insolubility of the solid. By this method, it is possible to provide a range of hydrogen peroxide or hypohalite-containing solids, the latter having controllable degrees of water solubility, thereby providing a controlled release of oxidant for various treatments such as treatment of drinking water supplies, etc.
REFERENCES:
patent: 3640876 (1972-02-01), Donaghu
patent: 3656890 (1972-04-01), Toy et al.
patent: 3843548 (1974-10-01), James
Lewis, College Chemistry, Barnes & Noble Books, New York, 9th Ed., 1971, p. 190.
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