Characterization of Novel Deep Eutectic Solvent, Choline Chloride/Glutamic Acid, as Efficient Solvent for Lignin Dissolution

A novel amino acid-based deep eutectic solvent (DES), choline chloride (ChCl)/glutamic acid (Glu), was developed as a green renewable solvent for efficient biomass pretreatment. Spectroscopic analysis revealed that Glu is rapidly converted to pyroglutamic acid (pGlu) through dehydration during the D...

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Bibliographic Details
Published in:Chemistry letters 2022-04, Vol.51 (4), p.407-411
Main Authors: Saito, Kaori, Hashizume, Tomohiro, Kitayama, Kenji, Watanabe, Takashi
Format: Article
Language:English
Subjects:
Amino acids
Biomass
Chlorides
Choline
Dehydration
Glutamic acid
Hydrogen bonds
Lignin
Lignocellulose
Pretreatment
Solvents
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Summary:A novel amino acid-based deep eutectic solvent (DES), choline chloride (ChCl)/glutamic acid (Glu), was developed as a green renewable solvent for efficient biomass pretreatment. Spectroscopic analysis revealed that Glu is rapidly converted to pyroglutamic acid (pGlu) through dehydration during the DES formation. However, hydrogen bond formation differed between ChCl/Glu DES and DES formed by mixing ChCl/pGlu. Furthermore, lignin was dissolved readily at 10% concentration in ChCl/Glu DES, indicating significant potential for application of ChCl/Glu DES in lignocellulosic biomass pretreatment.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.210723