TCF BLEACHING OF WHEAT-STRAW ORGANOCELL PULP

被引：0

作者：

PEKAROVICOVA, A ^{[1
]}

JAMEEL, H ^{[1
]}

JOYCE, TW ^{[1
]}

机构：

[1] N CAROLINA STATE UNIV, DEPT WOOD & PAPER SCI, RALEIGH, NC 27695 USA

来源：

CELLULOSE CHEMISTRY AND TECHNOLOGY | 1994年 / 28卷 / 05期

关键词：

D O I：

暂无

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Laboratory prepared Organocell straw pulp was bleached using O-L-P, O-X-P, O-P, as well as Eop-X-P, Eop-L-P, and Eop-P bleaching sequences. Ligninase prebleaching was more effective than xylanase prebleaching. Maximum brightness (72.9% ISO) was obtained with an O-L-P bleaching sequence. Poor performance of the peroxide stage was observed. The peroxide stage performance can be improved by using chelation pretreatment. Slightly lower brightness was obtained with chelation but without an acid wash. The effect of increasing xylanase charge in the X-Q-P bleach sequence nas tested. Maximum improvement of brightness (82.4% ISO) with chelation and 0.5% NaHSO3 in the X-Q-P sequence was reached at a xylanase dose of 3 U/g o.d. pulp, while the brightness of Q-P belached pulp was 79.9% ISO.

引用

页码：551 / 561

页数：11