公开(公告)号：US20150240423A1

公开(公告)日：2015-08-27

申请号：US14711146

申请日：2015-05-13

Applicant: INTERNATIONAL PAPER COMPANY

Inventor： CAIFANG YIN ,  ALFRED TREPOW ,  JACEK KALKA ,  GOPAL GOYAL

IPC: D21H17/00 ,  D21H11/00

CPC classification number: D21H17/005 ,  D21C5/005 ,  D21C9/10 ,  D21C9/14 ,  D21H11/00

Abstract: A prebleach treatment of pulp with xylanase enzyme prior to chemical bleaching is disclosed. A process of making pulp comprises treating a pulp with xylanase in an amount of less than 50 g of xylanase per ton of pulp. The treating step is carried while buffering the pulp and xylanase with a buffering agent to a pH of from about 6.5 to about 7.5 prior to at least one bleaching stage to form a treated pulp.

Abstract translation: 公开了在化学漂白之前用木聚糖酶酶预漂白处理纸浆。 制造纸浆的方法包括用木糖酶处理纸浆，其量为每吨纸浆少于50g的木聚糖酶。 在至少一个漂白阶段之前，用缓冲剂将纸浆和木聚糖酶缓冲至约6.5至约7.5的pH进行处理步骤，以形成经处理的纸浆。