Calcium hypochlorite composition containing magnesium and proces

Compositions – Oxidative bleachant – oxidant containing – or generative – Free halogen or oxy-halogen acid type

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8108A, 252 95, 252 99, 423474, 424149, C01B 1106, C11D 3395, D06L 308

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active

041087925

ABSTRACT:
The present invention describes a solid calcium hypochlorite composition comprising calcium hypochlorite and about 0.5% to about 50% by weight of substantially water-insoluble and unchlorinated magnesium compounds, said magnesium compounds being derived from impure hydrated lime. Furthermore, the present invention describes a process for making this composition, which is an improvement in the known process for the manufacture of a solid calcium hypochlorite composition wherein an aqueous slurry comprising a hydrated lime, a mixture of hydrated lime and at least one alkali metal hydroxide, or a mixture of hydrated lime and at least one alkali metal hypochlorite, is chlorinated to form an aqueous chlorinated slurry containing calcium hypochlorite and further processing said chlorinated slurry to recover a solid calcium hypochlorite composition.

REFERENCES:
patent: 3793216 (1974-02-01), Dychdala et al.
patent: 3843548 (1974-10-01), Jamps
patent: 3872219 (1975-03-01), Sakowski
patent: 3895099 (1975-07-01), Sakowski
patent: 3953354 (1976-04-01), Faust
patent: 3954948 (1976-05-01), Sakowski

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