Patent ID: 6660128
Filing Date: 2003-12-09
Classification: D06P,D21C

Abstract:
A process for oxidizing a substrate comprising:a) reacting a substrate to be oxidized, at an acid pH, with: i) a phenol oxidase, and ii) a transition metal complex redox mediator, said mediator having a redox potential between 0.5 and 1.2 V when measured against a normal hydrogen electrode; b) oxidizing said complex ii) with said oxidase i) from a reduced state to an oxidized state, and c) oxidizing said substrate with said complex ii) in said oxidized state, said substrate being selected from lignocellulosic pulp or cellulosic pulp whereby a lignocellulosic pulp is delignified by said oxidizing, or a cellulosic pulp is bleached by said oxidizing.