Patent ID: 7282113

Claim:
A method for deinking of waste paper pulp comprising: i) contacting a pulp of waste paper with at least a first enzyme which acts to dislodge ink and toner from the pulp, and at least a second enzyme which acts to disperse ink and toner in the pulp, ii) deinking said pulp with said enzymes, and, iii) recovering a deinked pulp, said first enzyme being selected from the group consisting of cellulases, amylases, pectinases, pullulanases, hemicellulases, proteases; glucose oxidase, cyclodextrin transferase, glycosyltransferase, pectate-lyase, glucose isomerase, and mixtures thereof and acting on at least one of: a) internal and surface substrates of said pulp, and b) interfacial substrates between the paper and ink and toner of the pulp, to dislodge ink and toner from said pulp; and said second enzyme is selected from the group consisting of 2,4-pentanedione hydrolase, a polyvinyl alcohol oxidase and mixtures thereof, and acts to disperse substrates present in ink and toner in said pulp.