A new environmental friendly catalyst, H3PW6Mo6O40/TiO2 was prepared. The optimum conditions have been found, that is, mass ratio of m (TiO2): m (H3PW6Mo6O40) is 1:2.0, volume of water is 30 mL, the reflux react...A new environmental friendly catalyst, H3PW6Mo6O40/TiO2 was prepared. The optimum conditions have been found, that is, mass ratio of m (TiO2): m (H3PW6Mo6O40) is 1:2.0, volume of water is 30 mL, the reflux reaction time is 2 h, and activated temperature is 150 ℃. H3PW6Mo6O40/TiO2 was used as catalyst in catalytic synthesis ofacetals and ketals. Effects ofn (aldehyde(ketone)): n (glycol), catalyst dosage and reaction time on yield were investigated. Optimal conditions were: n(aldehyde (ketone)): n (glycol)=1.0 : 1.4; mass fraction of catalyst to reactants, 0.8%; reaction time, 1.0 h and cyclohexane as water-stripped reagent, 10 mL. Under these conditions, yields of acetals and ketals can reach 53.0% -86.9 0%展开更多
以Cu_3(BTC)_2负载磷钨酸H_3PW12O40/Cu_3(BTC)_2催化剂催化,环己酮和乙二醇为原料合成环己酮乙二醇缩酮.探讨H_3PW12O40/Cu_3(BTC)_2对环己酮乙二醇缩酮的催化活性,较系统地研究了酮醇物质的量比、催化剂用量、带水剂用量...以Cu_3(BTC)_2负载磷钨酸H_3PW12O40/Cu_3(BTC)_2催化剂催化,环己酮和乙二醇为原料合成环己酮乙二醇缩酮.探讨H_3PW12O40/Cu_3(BTC)_2对环己酮乙二醇缩酮的催化活性,较系统地研究了酮醇物质的量比、催化剂用量、带水剂用量、反应时间等因素对产物收率的影响.实验表明:H_3PW12O40/Cu_3(BTC)_2是合成环己酮乙二醇缩酮的良好催化剂,在n(环己酮)∶n(乙二醇)=1∶1.4,催化剂用量占反应物料总质量0.6%,带水剂环己烷的用量为8 m L,反应时间45 min的最佳条件下,环己酮乙二醇缩酮的收率可达75.9%.展开更多
基金Acknowledgements: This work was financially supported by the Natural Science Foundation of Hubei Province, China (No. 2005ABA053) and the National Natural Science Foundation of China (No. 20471044).
摘要A new environmental friendly catalyst, H3PW6Mo6O40/TiO2 was prepared. The optimum conditions have been found, that is, mass ratio of m (TiO2): m (H3PW6Mo6O40) is 1:2.0, volume of water is 30 mL, the reflux reaction time is 2 h, and activated temperature is 150 ℃. H3PW6Mo6O40/TiO2 was used as catalyst in catalytic synthesis ofacetals and ketals. Effects ofn (aldehyde(ketone)): n (glycol), catalyst dosage and reaction time on yield were investigated. Optimal conditions were: n(aldehyde (ketone)): n (glycol)=1.0 : 1.4; mass fraction of catalyst to reactants, 0.8%; reaction time, 1.0 h and cyclohexane as water-stripped reagent, 10 mL. Under these conditions, yields of acetals and ketals can reach 53.0% -86.9 0%
摘要以Cu_3(BTC)_2负载磷钨酸H_3PW12O40/Cu_3(BTC)_2催化剂催化,环己酮和乙二醇为原料合成环己酮乙二醇缩酮.探讨H_3PW12O40/Cu_3(BTC)_2对环己酮乙二醇缩酮的催化活性,较系统地研究了酮醇物质的量比、催化剂用量、带水剂用量、反应时间等因素对产物收率的影响.实验表明:H_3PW12O40/Cu_3(BTC)_2是合成环己酮乙二醇缩酮的良好催化剂,在n(环己酮)∶n(乙二醇)=1∶1.4,催化剂用量占反应物料总质量0.6%,带水剂环己烷的用量为8 m L,反应时间45 min的最佳条件下,环己酮乙二醇缩酮的收率可达75.9%.