钛基固体超强酸对环己酮乙二醇缩酮催化反应的特性  

Catalytic Synthesis of Cyclohexanone Ethylene keta over solid Superacid

作　　者：李曹龙[1,2] 邓长戊[1] 胡显智[1] 字富庭[1] 马永平[1] 

机构地区：[1]昆明理工大学理学院应用化学系,云南昆明650093 [2]上海交通大学机动学院燃烧与环境技术研究中心,上海200410

出　　处：《分子催化》2009年第1期37-41,共5页Journal of Molecular Catalysis(China)

摘　　要：合成SO42-/TiO2、SO42-/TiO2-Ce(Ⅳ)、SO42-/TiO2-ZrO2三种不同的固体超强酸,以环己酮乙二醇缩酮为探针反应,发现550℃下焙烧的SO42-/TiO2-Ce(Ⅳ)催化活性最好.并以SO42-/TiO2-Ce(Ⅳ)为催化剂,考察反应温度、催化剂用量、反应时间、反应物配比和带水剂对缩酮化反应转化率和选择性的影响.结果表明,反应温度为110～125℃、催化剂用量占反应物料总质量的0.5%、环己酮和乙二醇物质的量比为1∶1.5、反应时间为1 h、环己烷为带水剂时,环己酮的转化率达95.2%,环己酮乙二醇缩酮的选择性98.7%,催化剂的重复使用效果好.The three different superacid catalysts （SO4^2-/TiO2, SO4^2-/TiO2-Ce（Ⅳ ） , SO4^2-/TiO2-ZrO2） were synthesized and their catalytic activity for the probe reaction of cyclohexanone ethylene keta was investigated. It was found that the SO4^2-/TiO2-Ce（Ⅳ） which was calcinated under 550℃ has the best activity. At the same time, the influence of reaction temperature, dosage of catalyst, reaction time , ratio between reactants and water-carrying agent were also investigated. Results show that reaction conversion of up to 95.2% and Selectivity of up to 98.7% were obtained under the following condition： reaction temperature 110 - 125 ℃, catalyst dosage 0.5% （mass fraction） of the total reactants, cyclohexanone/ethylene glycol molar ratio 1 ： 1.5, reaction time 1 h, water-carrying agent cyclohexane.

关 键 词：SO4^2-/TiO2-Ce(Ⅳ)固体超强酸 环己酮乙二缩酮 缩酮反应 

分 类 号：O643.32[理学—物理化学]