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Research Approaches to Sustainable Biomass Systems by Tadashi Hirasawa, Seishu Tojo

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Chapter 8

Energy-Saving Biomass Processing with Polar Ionic Liquids

Yukinobu Fukaya and Hiroyuki Ohno

Abstract

Ionic liquids (ILs), which are organic salts with melting points of lower than 100°C, have been prepared as potential solvents for extracting cellulose. The hydrogen-bonding basicity (β value) of ILs is an important parameter for evaluating their capability to dissolve cellulose. Some polar ILs with large β values have been synthesized based on the relationship between ion structure and the β value of the corresponding ILs. Some other ILs containing carboxylate anions or phosphonate derivatives have been confirmed to dissolve cellulose under mild conditions. Bran, a typical biomass, was mixed with polar ILs to extract cellulose. The ...

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