Catalyzed alkaline hydrogen peroxide bleaching of dye-containing

Details Catalyzed alkaline hydrogen peroxide bleaching of dye-containing Catalyzed alkaline hydrogen peroxide bleaching of dye-containing

1998-02-02

2000-09-19

Diamond, Alan

Bleaching and dyeing; fluid treatment and chemical modification

Bleaching

Color stripping or subduing

8107, 8111, 8138, 510309, 510311, 510312, 510320, 510321, D06L 302

Patent

active

061205540

ABSTRACT:
A process for decolorizing a cellulose textile bearing oxidized vat dye comprising contacting the cellulose textile with an aqueous solution of hydrogen peroxide containing an amount of a hydrogen peroxide catalyst sufficient to oxidize vat dye in the fabric until the dye is decolorized by oxidation. Then the cellulose textile is separated from the aqueous solution. The hydrogen peroxide catalyst can be a water-soluble lower alkyl quaternary amine salt such as a dihydroxypropyltrimethylammonium halide, chlorohydroxypropyltrimethylammonium halide or epoxypropyltrimethylammonium halide, or it can be a transition metal ion such as a cupric or stannous metal ion present in an amount of from 0.1 to 2 ppm. The process is suitable for decolorizing denim bearing vat dyes such as indigo, and is particularly suitable for decolorizing denim scrap.

REFERENCES:
patent: 2003928 (1935-06-01), Evant et al.
patent: 4218220 (1980-08-01), Kappler et al.
patent: 4243391 (1981-01-01), Puchta et al.
patent: 4286961 (1981-09-01), Buser et al.
patent: 4357256 (1982-11-01), Yamaguchi
patent: 4378967 (1983-04-01), Yotsuya et al.
patent: 4397757 (1983-08-01), Bright et al.
patent: 4532127 (1985-07-01), Feinland et al.
patent: 4614646 (1986-09-01), Christiansen
patent: 4740213 (1988-04-01), Ricci
patent: 4850156 (1989-07-01), Bellaire
patent: 4961751 (1990-10-01), Eissele et al.
patent: 5006125 (1991-04-01), Patton et al.
patent: 5030242 (1991-07-01), Bellaire
patent: 5114426 (1992-05-01), Milora et al.
patent: 5215543 (1993-06-01), Milora et al.
patent: 5298027 (1994-03-01), Kuno et al.
patent: 5458737 (1995-10-01), Diaddario, Jr.
patent: 5531796 (1996-07-01), Wasinger et al.
Lehninger, Principles of Biochemistry (month unknown), 1892.

Affiliated with

Also associated with

Rating

Catalyzed alkaline hydrogen peroxide bleaching of dye-containing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalyzed alkaline hydrogen peroxide bleaching of dye-containing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyzed alkaline hydrogen peroxide bleaching of dye-containing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1068103