MAGNESIUM SALTS OF PEROXYCARBOXYLIC ACIDS, PROCESSES FOR THEIR PREPARATION AND THEIR USE AS BLEACHING AGENTS IN WASHING COMPOSITIONS, AND PROCESSES

摘要

The present invention relates to the provision in solid form of the magnesium salt of certain aromatic, cycloaliphatic or conjugated aliphatic compounds containing a peroxycarboxylic acid group and a carboxylate group, and optionally also an alkyl, carboxylate, sulphonate, nitro, chloro or bromo group, which can be employed as bleaching agents. One especially referred example is magnesium monoperoxyphthalate having the formula: The invention also provides processes for the preparation of the salts, by reaction between a magnesium compound and the organic peroxyacid/carboxylate compound in a solvent from which the salt precipitates, the latter preferably being obtained by reaction between hydrogen peroxide and the corresponding anhydride under controlled reaction conditions of temperature and reagent ratios. The invention further provides desensitized compositions and washing compositions containing the bleaching agents and processes for washing or bleaching, employing them, preferably at from ambient to 60 DEG C.