OXYGEN BLEACHING OF KRAFT PULP .1. ROLE OF CONDENSED UNITS

Authors
LAI YZ FUNAOKA M CHEN HT
Citation
Yz. Lai et al., OXYGEN BLEACHING OF KRAFT PULP .1. ROLE OF CONDENSED UNITS, Holzforschung, 48(4), 1994, pp. 355-359
Citations number
14
Categorie Soggetti
Forestry,"Materials Science, Paper & Wood
Journal title
Holzforschung → ACNP
ISSN journal
00183830
Volume
48
Issue
4
Year of publication
1994
Pages
355 - 359
Database
ISI
SICI code
0018-3830(1994)48:4<355:OBOKP.>2.0.ZU;2-E
Abstract
A series of oxygen-bleached Norway spruce kraft pulps was analyzed by the alkaline nitrobenzene oxidation and phenyl nucleus exchange techni ques. It has been shown that the initial rapid oxygen delignification was largely attributed to the degradation of those condensed units ori ginated in the wood lignin. The diphenylmethane-type condensed structu res formed during kraft pulping were fairly resistant to the oxidative degradation, and its proportion in the residual lignin increased stea dily with the bleaching process.