Abstract
Abstract Extraction of polysaccharides from Japanese cedar using ionic liquids has been demonstrated. To this aim, eleven types of phosphonate ionic liquids have been synthesized, their properties investigated, and applied to biomass processing. All ionic liquids prepared display strong hydrogen-bonding characteristics of Kamlet–Taft parameters (β > 1.1) which enabled the effective extraction of polysaccharides from Japanese cedar. In particular, 15 wt % of polysaccharides was extracted from Japanese cedar powder using 1-(3-methoxypropyl)-3-methylimidazolium ethyl ethylphosphonate. Since the ionic liquid is easily prepared using conventional reagents and might be applicable to large-scale reactions, it is expected that practical polysaccharide extraction using the ionic liquid might be possible from a wide variety of biomass resources.
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