PRODUCTION OF DISSOLVING PULP FROM RECOVERED PAPER USING ENZYMES

This preliminary study suggests that pulps with chemical properties si milar to a dissolving pulp can be produced from once-dried, commercial ly-available, bleached hardwood kraft fiber and from high quality reco vered paper rich in hardwood fiber. A sequence employing an initial co ld alkali extraction, xylanase treatment, and a second cold alkali ext raction can effectively remove hemicelluloses and produce pulps with h igh alpha-cellulose content and acceptable viscosity.