用于合成4-(反-4'-正丙基环己基)环己酮催化剂的研究  

Reaserch on selective hydrogenation catalysts for synthesis of 4-(4'-trans-n-propylcyclohexyl)-cyclohexanone

作　　者：付阳[1,2] 赵佳[1] 丰枫[1] 曾翎[2] 李小年[1] 

机构地区：[1]浙江工业大学工业催化研究所绿色化学合成技术国家重点实验室培育基地,浙江杭州310014 [2]浙江科技学院,浙江杭州310023

出　　处：《工业催化》2014年第9期683-687,共5页Industrial Catalysis

摘　　要：环己酮衍生物作为一种重要的液晶中间体,其制备方法尤其是催化加氢合成法的研究受到关注。以质量分数55%HNO3处理的工业椰壳活性炭为载体,采用等体积浸渍与沉积-沉淀结合的方法制备0.9%Au-5%Pd/C-IM-DP催化剂,并应用于选择性加氢制备4-(反-4'-正丙基环己基)环己酮的反应。以环己烷作为溶剂,在反应温度150℃和反应压力0.8 MPa条件下反应2 h,原料转化率为98.7%,目标产物选择性达91.2%。相比于单金属5%Pd/C催化剂,0.9%Au-5%Pd/C-IM-DP催化剂具有较高的活性和选择性。通过XRD和TEM等对催化剂组成和形貌进行表征分析,结果表明,Au和Pd均以单金属颗粒形式存在,而Pd和Au之间的氢溢流作用可能是催化剂具有优异性能的原因。The research on the preparation method of cyclohexanone derivatives as a liquid crystal intermediate,especially their selective hydrogenation method has attracted widespread attention. Using coconut-shell activated carbon pretreated by 55wt% HNO3 as the support,0. 9% Au-5% Pd /C-IM-DP catalyst was prepared by isometric impregnation and deposition-precipitation methods. The as-prepared catalyst was applied in the selective hydrogenation for the synthsis of 4-（4’-trans-n-propylcyclohexyl）-cyclohexanone. The raw material conversion of 98. 7% and the selectivity to the target product of 91. 2%were attained under the condition as follows： cyclohexane as the solvent,reaction time 2 h,reaction temperature 150 ℃ and reaction pressure 0. 8 MPa. 0. 9% Au-5% Pd /C-IM-DP catalyst had higher activity and selectivity than monometallic catalyst 5% Pd /C. The catalysts were characterized by XRD and TEM.The results indicated that Au and Pd existed in the form of single metal particles;the catalyst possessed excellent performance probably due to the hydrogen spillover between Au and Pd.

关 键 词：催化化学 Pd AU 选择加氢 等体积浸渍法 沉积-沉淀法 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]