THE USE OF XYLANASE FOR PEROXIDE BLEACHING OF KRAFT PULPS DERIVED FROM DIFFERENT SOFTWOOD SPECIES - A RANGE OF EFFECTS WAS FOUND

被引：0
|
作者：
NELSON, SL [1 ]
WONG, KKY [1 ]
SADDLER, JN [1 ]
BEATSON, RP [1 ]
机构：
[1] CANFOR R&D CTR,VANCOUVER,BC,CANADA
来源：
PULP & PAPER-CANADA | 1995年 / 96卷 / 07期
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D O I：
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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：
Two commercial xylanase preparations showed a range of effects on the peroxide bleaching of kraft pulps derived from Douglas fir and western hemlock. In five of eight types of treatments, xylanase enhanced the pulp brightness achieved after two peroxide stages by 0.9 to 2.2% ISO. Immediately after xylanase treatment, direct brightening occurred in partially bleached pulps but not in the brownstocks, whereas a slight delignification occurred in all bur. one case. Toxicity of the combined bleaching filtrates appeared to be related to residual peroxide.
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页码：42 / 45
页数：4
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