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耐热耐碱木聚糖酶对马尾松KP浆的助漂性能(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年03期
Page:
31-34
Column:
研究论文
publishdate:
2010-06-29

Article Info:/Info

Title:
Effect of thermostable and alkaline tolerant xylanase pretreatment on the bleaching properties of pine kraft pulp
Author(s):
WANG Chu ZHAI Huamin* LIU Jingyi DAI Kai WU Wenjuan
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China
Keywords:
xylanase ECF bleaching kraft pulp Pinus massoniana
Classification number :
Q556;TS245.9
DOI:
10.3969/j.jssn.1000-2006.2010.03.007
Document Code:
A
Abstract:
The selectivity of thermostable and alkaline tolerant xylanase X on the pretreatment and pine kraft pulp bleaching was studied according to the change of pulp viscosity and kappa number before and after the pretreatment. The effect of the pretreatment on D0E1D1E2D2 bleaching properties was revealed by the changes of brightness of each bleaching stage and final viscosity. The results showed that the pretreatment had high selectivity without causing an obvious decrease of the pulp viscosity. The effective pretreatment conditions can be varied among pH 8.0—9.5 and 75—80 ℃. The final brightness of the bleached pulps pretreated with xylanase X was 1 % ISO higher than that of no pretreated one (90 % ISO brightness), but the viscosity lowed little under the same bleaching conditions or the ClO2 dosage in the D0 stage could be saved by 26 %—27 % to achieve the same brightness (90 % ISO) of the nopretreatment bleached pulp.

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Last Update: 2010-06-29