钼取代磷钨酸催化剂的制备及其催化性能研究  

Preparation and Catalytic Performance of Molybdenum Substituted Phosphotungstic Acids

作　　者：李贵贤[1] 张小莉[1] 张瑞寰 白宏伟[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]中国石油天然气玉门油田分公司炼化总厂,甘肃玉门735200

出　　处：《当代化工》2015年第12期2781-2784,共4页Contemporary Chemical Industry

摘　　要：合成了系列钼取代磷钨杂多酸(H3PW12-nMon·XH2O)催化剂,并且通过FT-IR,X-射线衍射仪对所合成的催化剂进行了结构表征。分子中钼含量的相对多少对乙酸环己酯的酯收率有影响,n=1,3,5时表现了相对较高的催化活性,H3PW9Mo3O40的催化活性最高。反应最佳条件为:以0.1 mol冰乙酸为基准,环己醇与冰乙酸的摩尔比为1.2:1.0,催化剂H3PW9Mo3O40的加入量为0.253 mmol,带水剂环己烷的加入量为10 m L,反应温度为110℃,反应时间为90 min,酯收率可达到93.06%。A series of Keggin type molybdenum substituted phosphotungstic acids（H3PW（12）-nMon·XH2O） were synthesized and characterized by FT-IR, X-ray diffraction. The results show that molybdenum substitution extent can significantly affect the catalytic activity in the yield of cyclohexyl acetate, when n = 1,3,5,the catalyst shows relatively high catalytic activity, and H3PW9Mo3O（40） exhibits the highest catalytic activity. The optimum reaction conditions are as follows：using 0.1 mol acetic acid as reference, the mole ratio of cyclohexanol to acetic acid is 1.2, cyclohexane dosage is 10 m L, the amount of catalyst H3PW9Mo3O（40） is 0.253 mmol, the reaction temperature is 110 ℃, the reacting time is 90 min, the yield of cyclohexyl acetate is up to 93.06%.

关 键 词：乙酸环己酯 钼取代磷钨酸 催化合成 

分 类 号：TQ426[化学工程]