CHARACTERISTICS OF TRICHLOROACETIC-ACID SPRUCE LIGNIN

Authors
ZULE J LIKON M OBLAKRAINER M MOZE A PERDIH A
Citation
J. Zule et al., CHARACTERISTICS OF TRICHLOROACETIC-ACID SPRUCE LIGNIN, Holzforschung, 51(5), 1997, pp. 414-418
Citations number
30
Categorie Soggetti
Forestry,"Materials Science, Paper & Wood
Journal title
Holzforschung → ACNP
ISSN journal
00183830
Volume
51
Issue
5
Year of publication
1997
Pages
414 - 418
Database
ISI
SICI code
0018-3830(1997)51:5<414:COTSL>2.0.ZU;2-L
Abstract
The chemical and physicochemical properties of lignin isolated from sp ent liquor obtained on trichloroacetic acid pulping of spruce wood wer e studied. Trichloroacetic (TCA) acid lignin is free soluble, especial ly in tetrahydrofuran. By elemental and functional group analysis the C-9 formula was deduced: C9H6.79O2.64(OCH3)(1.11)(OH)(0.63)(Ar). Compa red to a series of acid organosolv lignins, TCA lignin has a high meth oxyl and phenolic OH content, higher (M) over bar n ((M) over bar n= 2 330) and a low polydispersity of 1.9. Crude TCA lignin contains high a mounts of chlorine bound as easily removable trichloroacetyl ester gro ups.