Extractive Profiles in the Production of Sulfite Dissolving Pulp from Eucalyptus Globulus WOOD
authors Rodrigues, PF; Evtyugin, DD; Evtuguin, DV; Prates, A
nationality International
journal JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
author keywords Sulfite pulping; dissolving pulp; extractives; Fock reactivity; Eucalyptus globulus
keywords LIPOPHILIC EXTRACTIVES; CHEMICAL-COMPOSITION; PITCH DEPOSITS; REACTIVITY
abstract The profile of major families of extractives soluble in acetone and dichloromethane during the production of acid sulfite dissolving pulp from Eucalyptus globulus wood was assessed. Nearly 85% of total extractives were removed from wood during pulping and nearly 11% in the course of E-O-P pulp bleaching and secondary pulp screening. Unlike extractives of polyphenolic origin that were almost completely removed after the alkaline extraction stage (E), fatty acids were the main retained component in fully bleached pulp followed by sterols and fatty alcohols. Throughout the bleaching steps, the profiles of extractives were not necessarily decreasing and depended on their reactions with bleaching reagents and the presence of auxiliary chemicals (e.g. antifoams). In this context, the content of fatty acids and fatty alcohols was mostly vulnerable. It has been suggested that Fock reactivity of dissolving pulps is unaffected by extractives at concentrations up to 0.3%.
publisher TAYLOR & FRANCIS INC
issn 0277-3813
year published 2018
volume 38
issue 5
beginning page 397
ending page 408
digital object identifier (doi) 10.1080/02773813.2018.1513037
web of science category Materials Science, Paper & Wood
subject category Materials Science
unique article identifier WOS:000452021600004
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journal analysis (jcr 2017):
journal impact factor 1.418
5 year journal impact factor 1.539
category normalized journal impact factor percentile 83.333
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