Process for removal of excess dye from printed or dyed fabric or yarn
AssigneeNovozymes A/S
InventorsTure Damhus, Uwe Vogt, Palle Schneider
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Abstract
The present invention provides a process for removal of excess dye from newly manufactured printed or dyed fabric or yarn, comprising treatment with a rinse liquor comprising at least one enzyme selected from the group consisting of enzymes exhibiting peroxidase activity or laccase activity, an oxidation agent, and at least one mediator selected from the group consisting of aliphatic, cyclo-aliphatic, heterocyclic or aromatic compounds containing the moiety >N—OH, in particular 1-hydroxybenzotriazole.
Claims58
A process for removal of excess dye from newly manufactured printed or dyed fabric or yarn, comprising treatment with a rinse liquor comprising
- (a) at least one enzyme exhibiting peroxidase activity or laccase activity,
- (b) an oxidation agent,
- (c) at least one mediator selected from the group consisting of aliphatic, cyclo-aliphatic, heterocyclic or aromatic compounds containing the moiety >N—OH, and
- (d) optionally additives.
A process of any of the preceding claims, wherein the amount of enzyme is 0.005 to 5 mg enzyme protein per l of rinse liquor, preferably, 0.02 to 2 mg enzyme protein per l of rinse liquor, more preferably 0.05 to 1 mg enzyme protein per l of rinse liquor.
A process of any of the preceding claims, wherein the oxidation agent is a H2O2 source.
A process of any of the preceding claims, wherein the mediator is a compound of formula I:
- 3
- wherein
- R1, R2, R3, R4 are individually selected from the group consisting of hydrogen, halogen, hydroxy, formyl, carboxy and salts and esters thereof, amino, nitro, C1-C12 alkyl, C1-C6 alkoxy, carbonyl(C1-C12 alkyl), aryl, in particular phenyl, sulfo, aminosulfonyl, carbamoyl, phosphono, phosphonooxy, and salts and esters thereof, wherein the R1, R2, R3, R4 may be substituted with R5, wherein R5 represents hydrogen, halogen, hydroxy, formyl, carboxy and salts and esters thereof, amino, nitro, C1-C12 alkyl, C1-C6 alkoxy, carbonyl(C1-C12 alkyl), aryl, in particular phenyl, sulfo, aminosulfonyl, carbamoyl, phosphono, phosphonooxy, and salts and esters thereof,
- [X] is a group from (—N═N—), (—N═CR6—)m, (—CR6═N—)m, (—CR7═CR8—)m, and m is 1 or2.
A process of any of the preceding claims, wherein the concentration of mediator in the rinse liquor is from 0.1 μM to 50 mM, preferably 1 μM to 1 mM, more preferably 10 μM to 0.5 mM.
A process of any of the preceding claims, wherein the additives are surfactants and/or water conditioning agents.
A process of any of the preceding claims, wherein the dye or print is a reactive dye.
A system for removal of excess dye from newly manufactured printed or dyed fabric or yarn, which is a multi-component system comprising
- (a) at least one enzyme exhibiting peroxidase activity or laccase activity,
- (b) optionally an oxidation agent,
- (c) at least one mediator selected from the group consisting of aliphatic, cyclo-aliphatic, heterocyclic or aromatic compounds containing the moiety >N—OH, and
- (d) optionally additives.
Use of components comprising
- (a) at least one enzyme exhibiting peroxidase activity or laccase activity,
- (b) optionally an oxidation agent,
- (c) at least one mediator selected from the group consisting of aliphatic, cyclo-aliphatic, heterocyclic or aromatic compounds containing the moiety >N—OH, and
- (d) optionally additives
- for the preparation of a multi-component system for removal of excess dye or print from newly manufactured fabric or yarn.
A process for removal of excess dye from newly manufactured printed or dyed fabric or yarn, comprising treatment with a rinse liquor comprising
- (a) at least one enzyme exhibiting peroxidase activity or laccase activity,
- (b) an oxidation agent, and
- (c) N-hydroxyacetanilide.
A system for removal of excess dye from newly manufactured printed or dyed fabric or yarn, which is a multi-component system comprising
- (a) at least one enzyme exhibiting peroxidase activity or laccase activity,
- (b) optionally an oxidation agent,
- (c) N-hydroxyacetanilide, and
- (d) optionally additives.
Dependencies are inferred from the claim text.