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Adsorptive Purification of Ionic Liquids and their Reuse in Cellulose Processing
Author(s) -
Watts Marcus,
Kosan Birgit,
Hammerschmidt Jochen,
Dorn Susann,
Meister Frank,
Scholl Stephan
Publication year - 2017
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201700026
Subject(s) - ionic liquid , cellulose , adsorption , imidazole , dissolution , chemistry , chromatography , hydrolysis , chemical engineering , process (computing) , catalysis , organic chemistry , materials science , computer science , engineering , operating system
Unfortunately, imidazole‐based ionic liquids (ILs) tend to build high‐boiling impurities like chromophores. This results in reduced process stability and product conditions like stained cellulose fibers. Therefore, different adsorbent materials were tested for their capability to purify the IL 1‐ethyl‐3‐methylimidazolium acetate. The product quality was monitored by UV‐vis spectroscopy. It was observed that activated carbon showed the best purification results. The purified IL was successfully reused in the process of cellulose dissolution and shaping.