The carbon chain length of ILs has effect on its catalytic activity and [C6ImBS][HSO4]shows the best catalytic performance.
离子液体的碳链长度对其催化活性有影响,[C6ImBS][HSO4]表现出最佳的催化性能。
Binary Ionic Liquid System for Direct Cellulose Etherification
作者:Takeshi Kakibe、Satoshi Nakamura、Kiyokazu Amakuni、Hajime Kishi
DOI:10.1071/ch18378
日期:——
Etherification of cellulose was performed using a mixture of ionic liquids (ILs) playing roles in both cellulose dissolution and catalysis. We investigated the effects of the reaction time and the ratio of these ILs in the mixture. Cellulose etherification was performed in these IL mixtures. The proportion of propoxy cellulose exceeded 2.5 after 24 h.
Dehydration of glucose into 5-hydroxymethylfurfural in SO3H-functionalized ionic liquids
作者:Fu-Rong Tao、Chen Zhuang、Yue-Zhi Cui、Jing Xu
DOI:10.1016/j.cclet.2014.01.044
日期:2014.5
Abstract The continuous dehydration of d -glucose into 5-hydroxymethylfurfural (HMF) was carried out under mild conditions, using SO 3 H-functionalized acidic ionicliquids as catalysts and H 2 O-4-methyl-2-pentanone (MIBK) biphasic system as solvent. High glucose conversion of 97.4% with HMF yield of 75.1% was obtained at 120 °C for 360 min, also, small amounts of levulinic acid (LA) and formic acid
ionic liquids, [C6ImBS][HSO4] exhibited the best catalytic performance, which was ascribed to its strong Brønsted acidity and low viscosity. The catalytic activity of the ionic liquid was near that of concentrated sulfuric acid. The influences of ionic liquid dosage, reaction temperature and molar ratio of methanol to formaldehyde were explored using [C6ImBS]HSO4 as the catalyst. Under the optimal conditions
Brønsted acidic ionic liquids, supported on silica gel, have been used effectively in oligomerisation of isobutene. The supported catalysts could be used several times without loss of activity or change in selectivity. The ratio of the products could be influenced by the proper choice of the ionic liquid component of the catalyst and the reaction temperature.