| 摘要 |
This invention concerns a multicomponent system for changing, degrading or bleaching lignin, lignin-containing materials or similar substances and processes for its use, containing a) optionally, at least one oxidation catalyst and b) at least one suitable oxidant and c) at least one mediator, characterized by the fact that the mediator is selected from the oximes of general formula (I) or (II) and their salts, ethers, or esters, where the groups X are the same or different and are O, S, or NR<1>, where R<1> means hydrogen, a hydroxy, formyl, carbamoyl or sulfono radical, an ester or salt of the sulfono radical, sulfamoyl, nitro, amino, phenyl, aryl-C1-C5-alkyl, C1-C12-alkyl, C1-C5-alkoxy, C1-C10-carbonyl, carbonyl-C1-C6-alkyl, a phospho, phosphono, or phosphonooxy radical, an ester or salt of the phosphonooxy radical where carbamoyl, sulfamoyl, amino and phenyl radicals can be unsubstituted or substituted one or several times with radical R<2> and the aryl-C1-C5alkyl, C1-C12-alkyl, C1-C5-alkoxy, C1-C10-carbonyl, carbonyl-C1-C6-alkyl radicals can be saturated or unsaturated, branched or unbranched, and can be substituted one or several times with a radical R<2>, where the radicals R<2> are the same or different and means a hydroxy, formyl or carboxy radical, an ester or salt of the carboxy radical, a carbamoyl or sulfono radical, an ester or salt of the sulfono radical, a sulfamoyl, nitro, amino, phenyl, C1-C5-alkyl or C1-C5-alcoxy radical and the radicals R<3>-R<4> are the same of different and signify a halogen or carboxy radical, an ester or salt of the carboxy radical, or they have the meanings given for R<1>, R<3> and R<4> being optionally linked to a ring [-CR<7>R<8>]n, where n = 1, 2, 3, or 4, and R<5> and R<6> have the meanings given for R<1>, and R<7> and R<8> have the meanings given for R<3> and R<4>. |
