摘要
研究了在AlCl3催化下,丙三醇与环己酮、丁酮、丙酮、丙醛、丁醛、异丁醛、戊醛、异戊醛、正辛醛、二苯甲酮、苯甲醛等十余种醛(酮)的缩合反应。系统考察了反应时间、醛(酮)与醇的配比、AlCl3的用量及催化剂重复使用等因素对反应的影响,优化了反应条件。结果表明,当醛(酮)与丙三醇物质的量比为1∶1.2,催化剂用量为2g/mol醛(酮),反应2h,转化率可达99.2%,选择性可达100%。证明AlCl3对该缩合反应有较好的催化活性和选择性。
The acetalization and ketalization of various aldehydes and ketones with glycerol by using AlCl3 as catalyst are studied. Effects of reaction time, mole ratio of reactants and amount of catalyst on yield of acetals （ketals） were investigated. The optimum reaction conditions are as follows ： molar ratio of aldehydes and ketones to glycerol is 1 ： 1.2, catalyst amount is 2 g per mole of aldehydes or ketones, reaction time is 2h. Under that condition, conversion rate is 99.2% and selectivity is 100%. And the results also show that AlCl3 is an efficient catalyst for acetalization and ketalization with high catalytic activity and selectivity in mild conditions.
出处
《精细与专用化学品》
CAS
2006年第12期15-17,共3页
Fine and Specialty Chemicals
基金
上海科学技术发展基金(基金编号:03DJ14005)
