Bleaching and dyeing; fluid treatment and chemical modification – Bleaching – Chemical
Patent
1997-02-20
1999-06-15
Fries, Kery
Bleaching and dyeing; fluid treatment and chemical modification
Bleaching
Chemical
510305, 510312, 510320, 510374, 510376, 510392, 8137, 8401, C11D 3386, C11D 3395, D06P 302
Patent
active
059124059
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The invention relates to a method of oxidizing a compound with a phenol oxidizing enzyme and an enhancing agent. The invention also relates to a detergent additive and to a detergent composition.
BACKGROUND ART
By a phenol oxidizing enzyme is meant an enzyme which by using hydrogen peroxide or molecular oxygen, is capable of oxidizing organic compounds containing phenolic groups. Examples of such enzymes are peroxidases and oxidases.
It has earlier been found that coloured substances leached from dyed fabrics could be bleached by means of a phenol oxidizing enzyme. The use of peroxidases or oxidases for inhibiting dye transfer in this way is described in WO 91/05839.
Certain oxidizable substances, e.g., metal ions and phenolic compounds such as 7-hydroxycoumarin, vanillin, and p-hydroxybenzenesulfonate, have been described as accelerators or enhancing agents able to enhance enzymatic bleaching reactions (cf. e.g. WO 92/18683, WO 92/18687, and Kato M and Shimizu S, Plant Cell Physiol. 1985 26 (7), pp. 1291-1301 (cf. Table 1 in particular)). In WO 94/12621 other types of enhancing agents are disclosed, e.g., phenothiazines and phenoxazines.
It is the object of this invention to provide a new group of enhancing agents which are effective for enhancing phenol oxidizing enzymes.
SUMMARY OF THE INVENTION
It has now surprisingly been found that a new group of organic chemical substances performs excellently as enhancers of phenol oxidizing enzymes.
This new group of organic chemical substances not only make the bleaching reactions faster compared with using the phenol oxidizing enzyme alone, but many compounds which could not be bleached at all, may now be bleached by using the method of the invention.
Accordingly, the invention provides a method of oxidizing a compound with a phenol oxidizing enzyme, characterized by the presence of an enhancing agent of the following formula: ##STR1## in which formula A is a group such as --D, --CH=CH--D, --CH=CH--CH=CH--D, --CH=N--D, --N=N--D, or --N=CH--D, in which D is selected from the group consisting of --CO--E, --SO.sub.2 --E, --N--XY, and --N.sup.+ --XYZ, in which E may be --H, --OH, --R, or --OR, and X and Y and Z may be identical or different and selected from --H and --R; R being a C.sub.1 --C.sub.16 alkyl, preferably a C.sub.1 --C.sub.8 alkyl, which alkyl may be saturated or unsaturated, branched or unbranched and optionally substituted with a carboxy, sulfo or amino group; and B and C may be the same or different and selected from C.sub.m H.sub.2m+1; 1.ltoreq.m.ltoreq.5.
BRIEF DESCRIPTION OF THE DRAWING
The present invention is further illustrated by reference to FIG. 1 which shows the bleaching of gradually added Acid Blue 45 in phosphate/borate buffer pH 10 at 35.degree. C.; (I): Only dye addition; (II): Dye addition in the presence of Laccase; (III): Dye addition in the presence of Laccase+Acetosyringone; the experiment conducted as described in Example 8 .
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a method of oxidizing a compound with a phenol oxidizing enzyme, characterized by the presence of an enhancing agent of the following formula: ##STR2## in which formula A is a group such as --D, --CH=CH--D, --CH=CH--CH=CH--D, --CH=N--D, --N=N--D, or --N=CH--D, in which D is selected from the group consisting of --CO--E, --SO.sub.2 --E, --N--XY, and --N.sup.+ --XYZ, in which E may be --H, --OH, --R, or --OR, and X and Y and Z may be identical or different and selected from --H and --R; R being a C.sub.1 -C.sub.16 alkyl, preferably a C.sub.1 -C.sub.8 alkyl, which alkyl may be saturated or unsaturated, branched or unbranched and optionally substituted with a carboxy, sulfo or amino group; and B and C may be the same or different and selected from C.sub.m H.sub.2m+1; 1.ltoreq.m.ltoreq.5.
In a preferred embodiment A in the above mentioned formula is --CO--E, in which E may be --H, --OH, --R, or --OR; R being a C.sub.1 -C.sub.16 alkyl, preferably a C.sub.1 -C.sub.8 alkyl, which alkyl may be saturated or unsaturate
REFERENCES:
patent: 5700769 (1997-12-01), Schneider et al.
patent: 5752900 (1998-05-01), Pedersen et al.
Shuttleworth, et al "Soluble and Immobilized Laccase as Catalyst for the Transformation of Substituted Phenol" Enzyme Microb Technology, vol. 76 pp. 171-177, 1985.
Shuttlewor, et al., Enzyme Microb Technol, vol. 8, Mar. 1986.
Kawai, et al., Wood research, vol. 76, 1989.
Chadwick, et al., Chemical Abstract.
Alexandra et al., Chemical Abstract.
Kata, et al, Plant Cell Physiol. 26(7), 1291-1301 (1985).
Damhus Ture
Schneider Palle
Fries Kery
Lambiris Elias J.
Novo Nordisk A S
Rozek Carol E.
Zelson Steve T.
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