Aromatic sulfonic anhydrides as peroxygen activators

Details Aromatic sulfonic anhydrides as peroxygen activators Aromatic sulfonic anhydrides as peroxygen activators

1977-10-03

1978-09-19

Schulz, William E.

Bleaching and dyeing; fluid treatment and chemical modification

Bleaching

Chemical

252 95, 252186, 260502R, 424 62, D06L 302, D06L 304

Patent

active

041150589

ABSTRACT:
A process of removing soil and/or stains from fabrics by immersing the fabrics in a peroxygen bleach bath containing as a peroxygen activator an aromatic sulfonic anhydride of the formula RSO.sub.2 --O--SO.sub.2 R, wherein each R is an aromatic ring system selected from the class consisting of a phenyl group, taken together an o-phenylene group, a naphthyl group, taken together an o-naphthylene group and a heterocyclic group having 1 ring or 2 fused rings, said ring or rings containing 5 to 6 members of which 1 to 2 are heteroatoms selected from the class consisting of nitrogen, oxygen and sulfur, said groups optionally bearing 1 to 3 substituents selected from the class consisting of nitro, alkyl of 1 to 16 carbon atoms, alkoxy of 1 to 16 carbon atoms, aliphatic carboxamido of 1 to 16 carbon atoms, benzamido, chlorine and bromine. Aromatic is used herein in its modern sense to signify an organic ring system having aromatic character including both aromatic hydrocarbon and heterocyclic ring systems. Also described are dry blend compositions containing the bleach bath components.

REFERENCES:
patent: 2284477 (1942-05-01), Reichert et al.
patent: 3532634 (1970-10-01), Woods
patent: 3640876 (1972-02-01), Danaghu
patent: 3840466 (1974-10-01), Gray

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