Ionic liquids

2022-07-19T09:03:43Z

Markus Damm: /* Technology providers */

{{Infobox technology|Name=Ioniq Liquids|Category=[[Pre-processing]] ([[Pre-processing#Chemical_processes_and_technologies|Chemical processes and technologies]])|Feedstock=Lignocellulosic biowaste|Product=Lignin}}
<onlyinclude>'''Ionic liquids''' are organic salts that are liquid at room temperature. Because they are salts, they show no volatility. Moreover, they show a high thermal stability as well. Both properties allows them to be used as green solvents and as and alternative to volatile organic compounds. These properties are useful in the pre-treatment of lignocellulosic material by dissolving the material and separating the lignin.</onlyinclude><ref name=":0">{{Cite journal|title=Ionic liquid-mediated selective extraction of lignin from wood leading to enhanced enzymatic cellulose hydrolysis|year=2009-04-01|author=Sang Hyun Lee, Thomas V. Doherty, Robert J. Linhardt, Jonathan S. Dordick|journal=Biotechnology and Bioengineering|volume=102|issue=5|page=1368–1376|doi=10.1002/bit.22179}}</ref> Lignin streams can also be dissolved to allow for further processing. 

==Feedstock==

=== Origin and composition ===
Ionic liquids are capable of dissolving lignocellulosic biomass. Examples for biomass include corn stalks, rice straw, bagasse, pine wood, and spruce wood.<ref name=":0" /> Next to lignocellulosic biomass, lignin streams can be dissolved for further processing.

=== Pre-treatment ===

* [[Sizing|Seizing]]

==Process and technologies==
Ionic liquids have been shown to dissolve lignin or cellulose, because it can decrease the crystallinity and therefore makes it more accessible for further processing. Moreover, a full dissolution of lignocellulosic biomass can be used to extract the lignin. The technology can also be combined with [[hydrolysis]] to make the cellulose available as sugars for further processing.<ref name=":0" /> Cellulose can be recovered from the solution by the addition of water, ethanol, or acetone, while the ionic liquid can be recovered by pervaporation, reverse osmosis, salting out, or ionic exchange.<ref>{{Cite journal|title=Biomass pretreatment: Fundamentals toward application|year=2011-11-01|journal=Biotechnology Advances|volume=29|issue=6|page=675–685|doi=10.1016/j.biotechadv.2011.05.005|author=Valery B. Agbor, Nazim Cicek, Richard Sparling, Alex Berlin, David B. Levin}}</ref>

==Product==
The final product of the process depends on the exact combination of technologies. Generally, a large part of the lignin can be extracted from lignocellulosic material. Depending on the process properties it could also be that cellulose is more easily available for further processing.

=== Post-treatment===
There are no post-treatment technologies known at the moment.

==Technology providers==
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=== proionic (Austria) ===
{{Infobox provider-ionic liquids}}

===RISE (Sweden)===
{{Infobox provider-ionic liquids}}
After the LightFibre project showed that kraft lignin and cellulose can be dissolved in an ionic liquid and then wet-spun, the ConCarb project was started to convert lignin and cellulose into carbon fibers, which can be used in light weight composites.<ref>{{Cite web|year=|title=Continous stabilization and carbonization of lignin-cellulose for carbon fibers|e-pub date=|date accessed=30-8-2021|url=https://www.ri.se/en/what-we-do/projects/continous-stabilization-and-carbonization-of-lignin-cellulose-for-carbon-fibers}}</ref>

== Open access pilot and demo facility providers ==
Currently no providers have been identified.

==Patents==
Currently no patents have been identified.
==References==
<references />

[[Category:Pre-processing]]
[[Category:Technologies]]

Tech4Biowaste - User contributions [en]

Ionic liquids