THINKING WASTE PAPER BY TREATING WITH STARCH-DEGRADABLE ENZYME, e.g. AMYLASE

摘要

PCT No. PCT/DK94/00437 Sec. 371 Date May 15, 1996 Sec. 102(e) Date May 15, 1996 PCT Filed Nov. 23, 1994 PCT Pub. No. WO95/14807 PCT Pub. Date Jun. 1, 1995In the production of pulp and paper from starch-coated paper, the deinking effect can be improved by including a treatment with a starch-degrading enzyme e.g. amylase or a debranching enzyme. The process comprises enzyme treatment before, during or after disintegration of the paper to produce pulp, followed by separation of ink particles.