- Selective conversion of cellulose to levulinic acid via microwave-assisted synthesis in ionic liquids.
Selective conversion of cellulose to levulinic acid via microwave-assisted synthesis in ionic liquids.
Bioresource technology (2013-01-23)
Huifang Ren, Yonggui Zhou, Li Liu
PMID23337540
摘要
A highly selective approach to produce levulinic acid from cellulose was developed via microwave-assisted synthesis in SO3H-functionalized ionic liquids (SFILs). The effects of reaction conditions and ionic liquid structures on the yield of levulinic acid have been investigated, where the highest yield of 55.0% was obtained. The catalytic activities of SFILs depend on the anions and decrease in the order: HSO4->CH3SO3->H2PO4-, which is in good agreement with their acidity order. The SFILs are efficient catalysts for cellulose conversion into levulinic acid and the subsequent esterification, which facilitates the separation of product and reuse of ionic liquids.