Microwave-assisted direct transformation of lignocellulose into methyl glycopyranoside in ionic liquid
-
Takao Kishimoto
,
Mafuyu Saito
Abstract
Recently, conversion of lignocellulose into useful substances has attracted increasing attention. In our previous investigations, microcrystalline cellulose was successfully converted to methyl glucopyranosides (MeGlc) by the combined use of ionic liquid (IL) and microwave irradiation under moderate reaction conditions. In this study, lignocelluloses, including softwood, hardwood, and rice straw, were directly converted to methyl glycopyranosides (MG), including MeGlc, methyl mannopyranosides (MeMan), and methyl xylopyranosides (MeXyl) using acid-catalyzed methanolysis under microwave irradiation in ILs. Lignocellulose ball-milling was quite effective as a crucial process of increasing the yield of MG. Under the optimized reaction conditions, the molar yield of MeGlc reached 40% from softwood, which was a comparable yield from microcrystalline cellulose. MeXyl was also obtained in a 48% yield. These results showed that the combination of the dissolution of ball-milled lignocellulose in IL and the microwave-assisted methanolysis was an effective method of converting lignocellulose into a high-value-added substance.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: Part of this work was supported by JSPS KAKENHI, funder Id: http://dx.doi.org/ 10.13039/501100001691, grant no. JP16H04957.
Employment or leadership: None declared.
Honorarium: None declared.
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Artikel in diesem Heft
- Frontmatter
- Wood color changes and termiticidal properties of teak heartwood extract used as a wood preservative
- Relationship between attenuated total reflectance Fourier transform infrared spectroscopy of western juniper and natural resistance to fungal and termite attack
- Natural durability of four Tunisian Eucalyptus spp. and their respective compositions in extractives
- Understanding the structural changes of lignin in poplar following steam explosion pretreatment
- Influence of long-term heat treatment of kraft black liquor on lignin precipitation and material properties
- Effect of structure of technical lignin on the electrochemical performance of lignin-derived porous carbon from K2CO3 activation
- The effect of ionic liquid and superbase pre-treatment on the spring-back, set-recovery and Brinell hardness of surface-densified Scots pine
- Microwave-assisted direct transformation of lignocellulose into methyl glycopyranoside in ionic liquid
- Uncovering the ultrastructure of ramiform pits in the parenchyma cells of bamboo [Phyllostachys edulis (Carr.) J. Houz.]
Artikel in diesem Heft
- Frontmatter
- Wood color changes and termiticidal properties of teak heartwood extract used as a wood preservative
- Relationship between attenuated total reflectance Fourier transform infrared spectroscopy of western juniper and natural resistance to fungal and termite attack
- Natural durability of four Tunisian Eucalyptus spp. and their respective compositions in extractives
- Understanding the structural changes of lignin in poplar following steam explosion pretreatment
- Influence of long-term heat treatment of kraft black liquor on lignin precipitation and material properties
- Effect of structure of technical lignin on the electrochemical performance of lignin-derived porous carbon from K2CO3 activation
- The effect of ionic liquid and superbase pre-treatment on the spring-back, set-recovery and Brinell hardness of surface-densified Scots pine
- Microwave-assisted direct transformation of lignocellulose into methyl glycopyranoside in ionic liquid
- Uncovering the ultrastructure of ramiform pits in the parenchyma cells of bamboo [Phyllostachys edulis (Carr.) J. Houz.]
