摘要
研究了以室温离子液体为反应介质和催化剂的醛与二元醇的缩合反应 ,以苯丙醛和乙二醇的缩合反应为探针反应考察了不同离子液体对反应的催化效果 ,对反应时间、温度和反应物配比进行了选择 ,并进一步研究了不同醛与二元醇的缩合 .反应在无酸性催化剂、无共沸脱水剂存在的条件下进行 ,得到了由中至高的醛转化率 .离子液体在经减压蒸馏除水后可多次循环使用 ,而且对反应的效果并未明显降低 .
The acetalization of aldehydes with diols was accomplished by using ionic liquids as catalyst and reaction media. The effects of ionic liquids, reaction time, reaction temperature and reactants ratio on the conversion and selectivity of acetalization were investigated. In the reaction process removal of water produced and use of other acidic catalysts were not necessary. Medium to high conversion and good selectivity were obtained. The ionic liquid could be recycled and reused after removal of water under reduced pressure.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2004年第12期2047-2050,共4页
CIESC Journal
关键词
离子液体
醛
二元醇
缩醛反应
Aldehydes
Catalysis
Catalyst selectivity
Catalysts
Liquids
