HIGH-YIELD PULPING OF ASPEN WOOD - RELATION BETWEEN PULP PROPERTIES AND FIBER CHARACTERISTICS BY MULTIPLE LINEAR-REGRESSION

Citation
F. Carrasco et al., HIGH-YIELD PULPING OF ASPEN WOOD - RELATION BETWEEN PULP PROPERTIES AND FIBER CHARACTERISTICS BY MULTIPLE LINEAR-REGRESSION, Wood Science and Technology, 28(6), 1994, pp. 409-421
Citations number
16
Categorie Soggetti
Forestry,"Materials Science, Paper & Wood
Journal title
ISSN journal
00437719
Volume
28
Issue
6
Year of publication
1994
Pages
409 - 421
Database
ISI
SICI code
0043-7719(1994)28:6<409:HPOAW->2.0.ZU;2-E
Abstract
High-yield pulps have been obtained by means of steam explosion pulpin g. This process was carried out as follows: 1) chips soak impregnation (60 degrees C, 24 h, L/C = 6) in solutions containing 8% Na2SO3 and a variable concentration of either Na2CO3 or NaHCO3, ranging from 0 to 2%; 2) cooking at high temperature (190-200 degrees C) for short time (2-1 min); 3) rapid pressure release. This work shows that mechanical properties were substantially improved when adding a second chemical t o the Na2SO3 impregnation solution. Moreover, refining energy requirem ent was significantly reduced. However, the higher chemical charge use d made the optical properties drop. In this paper, mathematical models have been proposed in order to accurately predict specific refining e nergy and paper properties from sulfonate content and pulp yield. In a ddition, the relative importance of these two parameters has been stud ied.