Preparation of a bleach

Details Preparation of a bleach Preparation of a bleach

1977-04-26

1978-06-27

Padgett, Benjamin R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

8111, 423272, 423273, 252186, C11D 738, C11D 754, C11D 718

Patent

active

040975363

ABSTRACT:
The present invention provides a process for producing diphthaloyl peroxide comprising the steps of reacting particulate phthalic anhydride with aqueous hydrogen peroxide in a mobile slurry or paste and thereafter separating diphthaloyl peroxide from the aqueous phase. Preferably the minimum volume of hydrogen peroxide solution is employed commensurate with obtaining a mobile slurry or paste in a mole ratio of phthalic anhydride to hydrogen peroxide of 4:3 to 1:3. Preferably the reaction is effected at a temperature of from 25.degree. to 50.degree. C.
Diphthaloyl peroxide is particularly suitable for washing/bleaching fabrics, optionally in conjection with an inorganic persalt e.g. sodium perborate, at a temperature of from 30.degree. to 60.degree. C.

REFERENCES:
patent: 2454254 (1948-11-01), Kuoch
patent: 2927084 (1960-03-01), Wahl
patent: 3462370 (1969-08-01), Winter

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