Method for bleaching cloth

Details Method for bleaching cloth Method for bleaching cloth

1991-03-20

1994-12-06

Willis, Jr., Prince

Bleaching and dyeing; fluid treatment and chemical modification

Bleaching

Chemical

8104, 81164, 81492, D06L 306

Patent

active

053707079

ABSTRACT:
A method for bleaching a cloth comprising subjecting a cloth soaked with an aqueous bleaching solution comprising sodium chlorite to wet heat treatment at a temperature nearly to 100.degree. C., particularly subjecting a long cloth soaked with the bleaching solution to wet heat treatment continuously in an ordinary pressure wet heat treating chamber of which atmosphere being acidified to a pH of 3-4 by the use of an activation agent for making the atmosphere containing sodium chlorite acidic comprising an inorganic acid such as sulfuric acid and hydrochloric acid, an organic acid such as formic acid and acetic acid, and a carbonyl compound such as formaldehyde and acetaldehyde so as to form chlorine dioxide active for the bleaching of a cloth by the decomposition of sodium chlorite, and apparatuses for carrying out the method.

REFERENCES:
patent: 2900219 (1959-08-01), Waibel
patent: 2944872 (1960-07-01), Vermijs
patent: 3120424 (1964-02-01), Ruedi
patent: 4643736 (1987-02-01), Cholley
patent: 5228884 (1993-07-01), Ceaven et al.
Kirk-othmer Encyclopedia of Chemical Technology Third Edition vol. 3 John Wiley & Sons NY 1978, pp. 938-950. (no month available).

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