OZONE ORGANOSOLV BLEACHING OF RADIATA PINE KRAFT PULP

Authors
RUIZ J FREER J RODRIGUEZ J BAEZA J
Citation
J. Ruiz et al., OZONE ORGANOSOLV BLEACHING OF RADIATA PINE KRAFT PULP, Wood Science and Technology, 31(3), 1997, pp. 217-223
Citations number
16
Categorie Soggetti
Forestry,"Materials Science, Paper & Wood
Journal title
Wood Science and Technology → ACNP
ISSN journal
00437719
Volume
31
Issue
3
Year of publication
1997
Pages
217 - 223
Database
ISI
SICI code
0043-7719(1997)31:3<217:OOBORP>2.0.ZU;2-I
Abstract
The effect of organic solvents on the selectivity and brightness of hi gh consistency ozone bleaching of radiata pine I(raft-oxygen pulp was investigated. Among several organic compounds, formic acid is the most attractive one, as this solvent improves ozone delignification and, e fficiency and also prevents cellulose degradation. The selectivity at different ozone concentrations (1.1-1.7%) shows that formic acid incre ases the amount of ozone transferred and its accessibility to lignin. A peroxide stage (P) was carried out after ozonation (Z). The ZP seque nce was used to reach high brightness (83.1%) pulp.