Lignin solubility in non‐imidazolium ionic liquids

BACKGROUND: Until now ionic liquid research concerning lignin dissolution and processing has mainly focused on the imidazolium type ionic liquids. Other types of ionic liquids can extend the scope of such processes due to their better thermal, base and oxidation stability. RESULTS: A series of ammon...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of chemical technology and biotechnology (1986) Jg. 90; H. 10; S. 1821 - 1826
Hauptverfasser: Glas, Daan, Van Doorslaer, Charlie, Depuydt, Daphne, Liebner, Falk, Rosenau, Thomas, Binnemans, Koen, De Vos, Dirk E
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Chichester, UK John Wiley & Sons, Ltd 01.10.2015
Wiley Subscription Services, Inc
Schlagworte:
Ammonium
biopolymer processes
Biotechnology
chemical structure
Chemical technology
Dissolution
Fourier transform infrared spectroscopy
Ionic liquids
lignin
lignosulfonates
Molecular structure
nuclear magnetic resonance spectroscopy
oxidative stability
Pyrolysis
Recycled
renewable chemical feedstock
Solubility
viscosity
Wood
ISSN:0268-2575, 1097-4660
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:BACKGROUND: Until now ionic liquid research concerning lignin dissolution and processing has mainly focused on the imidazolium type ionic liquids. Other types of ionic liquids can extend the scope of such processes due to their better thermal, base and oxidation stability. RESULTS: A series of ammonium, phosphonium and pyrrolidinium based ionic liquids was screened for lignin dissolution. Tributylmethylphosphonium methyl sulfate and N‐butyl‐N‐methylpyrrolidinium dicyanamide displayed the highest Kraft lignin dissolution at 90 °C, with 460 and 390 g kg‐¹, respectively. The latter ionic liquid combines this high solubility with a rather low viscosity, resulting in a promising medium for processing lignin and for other potential applications in wood separation technology. Owing to the ionic character of lignosulfonate, its solubility was even higher. The molecular structures of both recovered lignin and ionic liquid were not changed after lignin dissolution, as proven with FT‐IR, Curie‐point pyrolysis‐GC/MS and NMR. The ionic liquid could be recycled without loss in lignin dissolving ability. CONCLUSION: Ammonium, phosphonium, and pyrrolidinium based ionic liquids proved suitable for lignin dissolution, if combined with the right counterion. © 2014 Society of Chemical Industry
Bibliographie:http://dx.doi.org/10.1002/jctb.4492
ArticleID:JCTB4492
istex:09CD22B47F8F9BF0D4A5B6654E6C52588F2C1EE1
ark:/67375/WNG-8HNLLCCQ-M
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:0268-2575
1097-4660
DOI:10.1002/jctb.4492