On the effect of a xylanase post-treatment as a means of reducing the yellowing of bleached hardwood kraft pulp

被引：8
|
作者：
Simeonova, Galya [1 ]
Sjodahl, Ragnar [1 ]
Ragnar, Martin [1 ]
Lindstrom, Mikael E. [1 ]
Henriksson, Gunnar [1 ]
机构：
[1] Royal Inst Technol, KTH, Dept Fibre & Polymer Technol, SE-10044 Stockholm, Sweden
来源：
NORDIC PULP & PAPER RESEARCH JOURNAL | 2007年 / 22卷 / 02期
关键词：
xylanase; hardwood kraft pulp; ageing; brightness stability; hexenuronic acid; bleaching;
D O I：
10.3183/npprj-2007-22-02-p172-176
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：
The effect of an enzymatic post-treatment of bleached hardwood kraft pulp in order to improve the brightness stability was studied using two commercially available endoxylanases. The results clearly show that the yellowing was significantly reduced for two pulps of different origins bleached in different ways. The beneficial effect on the brightness stability was linked to a removal of hexenuronic acid (HexA) from the pulps. The practical applicability of the results needs to be considered in relation to the cost of the enzyme and to indications that there is some yield loss due to the treatment.
引用
收藏
页码：172 / 176
页数：5
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