Method and device for dyeing a textile substrate

Abstract

A method and device for dyeing a textile substrate with reactive dyes, in which the textile substrate is brought in contact with a dyeing liquor containing at least one dye and after a predetermined dyeing time, the dyed textile substrate is rinsed. The dye which has not been fixed by the textile substrate and is present in the dyeing liquor is destroyed by a chemical and/or physical treatment so that the dyeing liquor is largely colourless hereafter, whereby the textile substrate being rinsed with the largely decolourised liquor. The comprises a vessel for receiving the textile substrate to be dyed and a circulation system for the dyeing liquor.

1 - 25 . (canceled) 
     
     
         26 . A method for dyeing and/or rinsing a textile substrate, wherein
 the textile substrate is arranged in a vessel and brought in contact with a dyeing liquor containing at least one dye and after a predetermined dyeing time has elapsed, the dyed textile substrate is rinsed with a rinsing liquor,   a circulation system for the dyeing liquor and rinsing liquor is assigned to the vessel,   a reactor through which the dyeing liquor or the rinsing liquor flows is connected with the vessel and/or with the circulation system, and then   the reactor is connected with a device for generating ozone such that the at least one dye which has not been fixed by the textile substrate and is present in the dyeing liquor or the rinsing liquor is destroyed by the ozone treatment to such an extent that the dyeing liquor respectively rinsing liquor is largely colorless thereafter, and wherein   the textile substrate is rinsed with the largely decolorized dyeing liquor or rinsing liquor as rinsing liquor.   
     
     
         27 . The method for rinsing a dyed textile substrate according to  claim 26 , wherein
 after the predetermined dyeing time has elapsed, the dyed textile substrate is removed from the vessel and transferred to an apparatus for rinsing,   the apparatus is filled with a rinsing liquor and the dyed textile substrate is rinsed,   a circulation system for the rinsing liquor is assigned to the apparatus,   a reactor through which the rinsing liquor flows is connected with the apparatus and/or with the circulation system, and then   the reactor is connected with a device for generating ozone such that the at least one dye which has not been fixed by the textile substrate and is present in the rinsing liquor is destroyed by the ozone treatment to such an extent that the rinsing liquor is largely colorless thereafter, and wherein   the textile substrate is further rinsed with the largely decolorized rinsing liquor as rinsing liquor.   
     
     
         28 . The method according to  claim 26 , wherein the dyeing liquor, respectively the rinsing liquor, is separated from the dyed respectively rinsed textile substrate and the dyeing liquor respectively rinsing liquor is treated with the ozone hereafter. 
     
     
         29 . The method according to  claim 26 , wherein the textile substrate is rinsed exclusively with the decolorized dyeing liquor or with the decolorized rinsing liquor, that are essentially colorless after treatment with ozone. 
     
     
         30 . The method according to  claim 26 , wherein the textile substrate is rinsed exclusively with the dyeing liquor, that is essentially colorless after treatment with ozone. 
     
     
         31 . The method according to  claim 30 , wherein in a first step, the textile substrate is treated with the dyeing liquor as rinsing liquor that is essentially colorless after treatment with ozone, wherein in a second step, the rinsing liquor laden with non-fixed dye is separated thereafter, wherein in a third step, the non-fixed dye located in the rinsing liquor is destroyed to such an extent that the rinsing liquor is largely colorless, and wherein in a fourth step, the textile substrate is rinsed with the largely colorless rinsing liquor. 
     
     
         32 . The method according to  claim 31 , wherein the first to the fourth steps are repeated multiple times, in particular twice to fifteen times. 
     
     
         33 . The method according to  claim 26 , wherein a redox potential measurement, an ozone measurement and/or the pH measurement of the ozone-treated liquor is made at the outlet of the reactor. 
     
     
         34 . The method according to  claim 26 , wherein a fabric is dyed as the textile substrate. 
     
     
         35 . The method according to  claim 26 , wherein the textile substrate is dyed with reactive dyes. 
     
     
         36 . The method according to  claim 26 , wherein the method is carried out with a liquor ratio between 1:4 and 1:6.