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Class Information
Number: 8/440
Name: Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers > Dye recovery process, other than nominal recovery
Description: Processes involving a significant dye recovery process.

Patents under this class:

Patent Number Title Of Patent Date Issued
8613779 Textile dyeing process of cellulosic fibers and their blends and polyester and its blends with recycled dyeing baths Dec. 24, 2013
8088174 Method for wash-protecting the color of artificially dyed keratin fibers Jan. 3, 2012
6083283 Method for removing color from ionically dyeable polymeric materials Jul. 4, 2000
6056790 Method for automated dyebath reuse May. 2, 2000
6036726 Process for separating polyamide from colorant Mar. 14, 2000
6019798 Process for recovering dyestuff from dyestuff-containing information-recording media and solvent used for recovery Feb. 1, 2000
6019799 Method to space dye yarn Feb. 1, 2000
5989296 Solvent process for recovering indigo dye from textile scrap Nov. 23, 1999
5772696 Process for purification of water soluble dyes via water insoluble metal salt intermediate Jun. 30, 1998
5468536 Sorbent articles Nov. 21, 1995
5250078 Process for dyeing hydrophobic textile material with disperse dyes from supercritical CO.sub.2 : reducing the pressure in stages Oct. 5, 1993
5202028 Removal of metal complex dyes from wastewaters Apr. 13, 1993
5096458 Preparation of stable anionic dyestuff solutions: pressure permeation of crude dye in solution of lithium or ammonium salt Mar. 17, 1992
4715863 Process for dyeing hydrophobic fibre material from aqueous bath containing untreated disperse dye and to adjust the exhausted dye bath for further use Dec. 29, 1987
4693892 Gelatin containing .beta.-carotene Sep. 15, 1987
4684453 Purification of dye baths Aug. 4, 1987
4648883 Process for the preparation of storage stable aqueous formulations of anionic dyes: amon exchange resin treatment Mar. 10, 1987
4402701 Leather dyeing agents and their preparation: membrame separation of dye mother liquor Sep. 6, 1983
4268265 Natural dyestuffs for gelatine capsules May. 19, 1981
4260388 Purification of anthocyan solutions Apr. 7, 1981
4165288 Process of treating waste water from a textile vat dyeing operation to produce a concentrate for reuse Aug. 21, 1979
4165217 Halohydrocarbon treatment of a glycol and waste dye liquor followed by water extraction of the glycol Aug. 21, 1979
4152113 System for dyeing hosiery goods May. 1, 1979
4092105 Method of recovering oxidized dye from dye wash water May. 30, 1978
4047889 Process for the rapid, continuous and waterless dyeing of textile and plastic materials Sep. 13, 1977
4000069 Method for purifying waste waters which contain anionic-type organic compounds Dec. 28, 1976
3947248 Clarification of aqueous waste streams containing dispersed dyes Mar. 30, 1976
3944383 Dyeing process Mar. 16, 1976

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