研究了双阳离子型酸性离子液体[TMEDAPS][HSO4]和正丁醇组成温控两相催化体系,催化果糖脱水制备5-羟甲基糠醛。该催化体系具有良好的催化性能,在反应温度为110℃,反应时间为120 min,离子液体用量为5 m L时,5-HMF的收率达到91.3%。离子液...研究了双阳离子型酸性离子液体[TMEDAPS][HSO4]和正丁醇组成温控两相催化体系,催化果糖脱水制备5-羟甲基糠醛。该催化体系具有良好的催化性能,在反应温度为110℃,反应时间为120 min,离子液体用量为5 m L时,5-HMF的收率达到91.3%。离子液体[TMEDAPS][HSO4]经过真空干燥除水后,重复使用五次,其催化性能没有明显的变化,可以保持稳定的5-HMF的收率。展开更多
Two Acid sites PEG thermoregulated ionic liquid was prepared and used as the catalyst for the esterification of aromatic acid and alcohol.The yield of esterification catalyzed by ionic liquid was 99% in 1 h at 80 ℃ w...Two Acid sites PEG thermoregulated ionic liquid was prepared and used as the catalyst for the esterification of aromatic acid and alcohol.The yield of esterification catalyzed by ionic liquid was 99% in 1 h at 80 ℃ with 0.1%(molar fraction)acidic PEG ionic liquid.The catalyst system could be applied to a wide range of esterification of aromatic acids and alcohols.The ionic liquid has the advantages of both homogeneous and heterogeneous phase at different temperature with a high product yield and the ease of product as well as catalyst separation.The ionic liquid studied plays the role of catalyst and is recycled up to seven times without any significant loss of activity.Morover,by simple phase separation the ionic liquid phase could be re-utilized up to seven times without leaching.展开更多
文摘研究了双阳离子型酸性离子液体[TMEDAPS][HSO4]和正丁醇组成温控两相催化体系,催化果糖脱水制备5-羟甲基糠醛。该催化体系具有良好的催化性能,在反应温度为110℃,反应时间为120 min,离子液体用量为5 m L时,5-HMF的收率达到91.3%。离子液体[TMEDAPS][HSO4]经过真空干燥除水后,重复使用五次,其催化性能没有明显的变化,可以保持稳定的5-HMF的收率。
文摘Two Acid sites PEG thermoregulated ionic liquid was prepared and used as the catalyst for the esterification of aromatic acid and alcohol.The yield of esterification catalyzed by ionic liquid was 99% in 1 h at 80 ℃ with 0.1%(molar fraction)acidic PEG ionic liquid.The catalyst system could be applied to a wide range of esterification of aromatic acids and alcohols.The ionic liquid has the advantages of both homogeneous and heterogeneous phase at different temperature with a high product yield and the ease of product as well as catalyst separation.The ionic liquid studied plays the role of catalyst and is recycled up to seven times without any significant loss of activity.Morover,by simple phase separation the ionic liquid phase could be re-utilized up to seven times without leaching.
