Unexpected Chloro-functionalized Ionic liquids-promoted Selective Conversion of Cellulose into Levulinic Acid

Hao Ma, Yanhui Qiao, Junjiang Teng

Abstract


A series of chloro-functionalized ionic liquids (CFILs) with chlorine groups (–Cl) on cations and chloride anions (Cl-) were synthesized and used as the promotion reagents for the selective conversion of cellulose into levulinic acid (LA) with the co-product of formic acid (FA). The co-operation between cations and anions of CFILs was investigated intensively through the variation of the structure of cations and the addition of salts with different anions. 3-(3-chloropropyl)-1-methyl-imidazolium chloride (IL-3) was the most appropriate additive, achieving up to 4.2%, 52.6%, and 58.7% of glucose, LA, and FA yields at 83.5% of cellulose conversion, respectively.

Keywords


Cellulose; Chloro-functionalized ionic liquids; Levulinic acid; Formic acid

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