Seperation of syringol from birch wood-derived vacuum pyrolysis oil

Citation
Jn. Murwanashyaka et al., Seperation of syringol from birch wood-derived vacuum pyrolysis oil, SEP PURIF T, 24(1-2), 2001, pp. 155-165
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
SEPARATION AND PURIFICATION TECHNOLOGY
ISSN journal
1383-5866 → ACNP
Volume
24
Issue
1-2
Year of publication
2001
Pages
155 - 165
Database
ISI
SICI code
1383-5866(20010601)24:1-2<155:SOSFBW>2.0.ZU;2-O
Abstract
A birch wood sample (Betula papyrifera) composed of 54% sapwood and 46% bar k was pyrolyzed in a pilot plant reactor, The products were 53.9% condensat es (pyrolysis oil including 8% reaction water), 24.0% gas and 22.1% wood ch arcoal (anhydrous initial feed basis). The pyrolysis oil was steam distille d and the recovery of phenols at various steam pyrolysis oil ratios was stu died. A 14.9% by wt. of volatile pyrolysis oil fraction (based on the total feed oil) was recovered at a steam:oil ratio of 27. The distillate was ana lyzed by GC/MS after acetylation and showed 21.3% by wt. of phenolic compou nds on the pyrolysis oil basis. The distillate was further distilled under a total pressure of 0.7 kPa. About 16 sub-fractions were recovered. The ste am-distilled fractions were found to be chemically and thermally stable whe n subjected to further purification processes. The 2.6-dimethoxyphenol (syr ingol)-rich fraction was separated and purified. Syringol with a purity of 92.3% was obtained. (C) 2001 Elsevier Science B.V. All rights reserved.