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

Authors
NELSON SL WONG KKY SADDLER JN BEATSON RP
Citation
Sl. Nelson et al., THE USE OF XYLANASE FOR PEROXIDE BLEACHING OF KRAFT PULPS DERIVED FROM DIFFERENT SOFTWOOD SPECIES - A RANGE OF EFFECTS WAS FOUND, Pulp & paper Canada, 96(7), 1995, pp. 42-45
Citations number
13
Categorie Soggetti
Materials Science, Paper & Wood
Journal title
Pulp & paper Canada → ACNP
ISSN journal
03164004
Volume
96
Issue
7
Year of publication
1995
Pages
42 - 45
Database
ISI
SICI code
0316-4004(1995)96:7<42:TUOXFP>2.0.ZU;2-4
Abstract
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 combine d bleaching filtrates appeared to be related to residual peroxide.