The ketalization of cyclohexanone with ethylene glycol catalyzed by I2 was studied.The effects of reaction time,reactant ratio,catalyst amount and the amount of water-carrying agent on the yield of cyclohexanone ethyl...The ketalization of cyclohexanone with ethylene glycol catalyzed by I2 was studied.The effects of reaction time,reactant ratio,catalyst amount and the amount of water-carrying agent on the yield of cyclohexanone ethylene glycol ketal was investigated.The results showed that the most suitable condition for the reaction were as follows:ethylene glyco:cyclohexanone molar ratio 1.2,molar ratio of catalyst to reactant 0.005%,cyclohexane as the water-carrying agent 6 ml,reaction time 30 min.The yield was up to 94.3%.展开更多
以磷石膏(PG)为催化剂催化合成缩醛(酮)。考察了醇酮摩尔比、催化剂用量、反应时间、带水剂种类及用量、催化剂重复使用次数等因素对合成环己酮乙二醇缩酮的影响,研究了PG催化合成12种缩醛(酮)的催化活性。实验结果表明,在PG用量为环己...以磷石膏(PG)为催化剂催化合成缩醛(酮)。考察了醇酮摩尔比、催化剂用量、反应时间、带水剂种类及用量、催化剂重复使用次数等因素对合成环己酮乙二醇缩酮的影响,研究了PG催化合成12种缩醛(酮)的催化活性。实验结果表明,在PG用量为环己酮的7.5%(w)、醇酮摩尔比为1.5、环己烷16 m L、反应时间2.5 h的条件下,PG催化合成环己酮乙二醇缩酮的产率可达99.9%以上;PG重复使用8次后,环己酮乙二醇缩酮产率仍达98.5%以上;在12种缩醛(酮)的制备反应中PG均表现出优良的催化性能,PG具有环境友好型固体酸催化剂的潜质,有望实现磷酸工业副产的回收利用和资源化处理。展开更多
文摘The ketalization of cyclohexanone with ethylene glycol catalyzed by I2 was studied.The effects of reaction time,reactant ratio,catalyst amount and the amount of water-carrying agent on the yield of cyclohexanone ethylene glycol ketal was investigated.The results showed that the most suitable condition for the reaction were as follows:ethylene glyco:cyclohexanone molar ratio 1.2,molar ratio of catalyst to reactant 0.005%,cyclohexane as the water-carrying agent 6 ml,reaction time 30 min.The yield was up to 94.3%.
文摘以磷石膏(PG)为催化剂催化合成缩醛(酮)。考察了醇酮摩尔比、催化剂用量、反应时间、带水剂种类及用量、催化剂重复使用次数等因素对合成环己酮乙二醇缩酮的影响,研究了PG催化合成12种缩醛(酮)的催化活性。实验结果表明,在PG用量为环己酮的7.5%(w)、醇酮摩尔比为1.5、环己烷16 m L、反应时间2.5 h的条件下,PG催化合成环己酮乙二醇缩酮的产率可达99.9%以上;PG重复使用8次后,环己酮乙二醇缩酮产率仍达98.5%以上;在12种缩醛(酮)的制备反应中PG均表现出优良的催化性能,PG具有环境友好型固体酸催化剂的潜质,有望实现磷酸工业副产的回收利用和资源化处理。
