Acid-chromic chloride functionalized natural clay-particles for enhanced conversion of one-pot cellulose to 5-hydroxymethylfurfural in ionic liquids

作者：Zhang, Yunlei; Pan, Jianming^*; Gan, Mengying; Ou, Hongxiang; Yan, Yongsheng; Shi, Weidong; Yu, Longbao

来源：RSC Advances, 2014, 4(23): 11664-11672.

DOI：10.1039/c3ra46561f

• MESOPOROUS SILICA
• SOLID ACID
• CATALYTIC CONVERSION
• SELECTIVE CONVERSION
• BIOMASS
• HYDROLYSIS
• EFFICIENT
• FRUCTOSE
• HMF
• MONOSACCHARIDES

By grafting - SO3H and Cr(III) onto the surface of treated attapulgite (ATP) and halloysite nanotubes (HNTs), two acid-chromic chloride bi-functionalized catalysts i.e. ATP-SO3H-Cr(III) and HNTs-SO3H-Cr(III) were successfully synthesized. Then the as-prepared catalysts were characterized by SEM, TEM, EDS, XPS, BET, NH3-TPD, nitrogen adsorption-desorption and TG analysis. The catalytic activities of the synthesized ATP-SO3H-Cr(III) and HNTs-SO3H-Cr(III) were evaluated for the conversion of one-pot cellulose to 5-hydroxymethylfurfural (HMF) in an ionic liquid ([EMIM]-Cl) system. The amount of catalyst, reaction time and reaction temperature were optimized for cellulosic conversion over the two catalysts, resulting in a maximum yield of 31.20% for ATP-SO3H-Cr(III) and 41.22% for HNTs-SO3H-Cr(III) under the optimized conditions. The clay supported catalysts developed in this work showed greatly improved performances in cellulose-to-HMF conversion over other solid catalysts. In addition, the prepared catalysts could be very easily recycled, at least three times for ATP-SO3H-Cr(III) and twice for HNTs-SO3H-Cr(III) without significant loss of activity.

• 出版日期2014
• 单位江苏大学