Co_4HP_2Mo_(15)V_3O_(62)的合成及其催化乙苯氧化反应性能  

Synthesis of Co_4HP_2Mo_(15)V_3O_(62) and Their Catalytic Performance for Ethylbenzene oxidation

作　　者：李贵贤[1] 王立新[1,2] 高云艳[1] 滕志君[1,2] 张雪梅[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]甘肃银光聚银化工有限公司,甘肃白银730900

出　　处：《分子催化》2011年第1期24-29,共6页Journal of Molecular Catalysis(China)

基　　金：甘肃省教育厅科研基金项目(2005GJ0281)

摘　　要：合成了一系列Dawson型磷钼钒钴杂多酸盐ConH9-2nP2Mo15V3O62(n=1-4),用傅立叶变换红外光谱表征了磷钼钒钴的结构.以乙苯为原料、H2O2为氧化剂、磷钼钒钴杂多酸盐为催化剂催化氧化乙苯制备苯乙酮.考察了催化剂种类及用量、助剂用量、H2O2用量、反应时间、溶剂种类、溶剂用量、反应温度对乙苯氧化反应的影响.实验结果表明,随着钴含量的增加,催化剂活性逐渐增高.最佳反应条件为:乙苯25 mmol,Co4HP2Mo15V3O62催化剂0.05 mmol,n(乙苯)/n(过氧化氢)=0.125,n(B r-)/n(Co2+)=25,冰乙酸用量20 mL,反应温度80℃,反应时间1 h.在此条件下,乙苯的转化率可达81.1%,苯乙酮的收率可达到53.4%.A series of molybdovanadophosphoric cobalt heteropoly compounds with Dawson type were synthesized and characterized by Fourier transform infrared spectroscopy（FT-IR）.The catalytic activity of the molybdovanadophosphoric cobalt heteropoly compounds for the oxidation of ethylbenzene to acetophenone with H2O2 and the effects of reaction conditions were studied.The results showed that the conversion of ethylbenzene was 81.1% and the yield of acetophenone was 53.4% under the suitable reaction conditions of the amount of ethylbenzene 25 mmol,Co4HP2Mo15V3O62 catalyst 0.05 mmol,acetic 20 mL,n（C6H6）/n（H2O2）=0.125,n（Br-）/n（Co2＋）=25,reaction time 1 h,and temperature 80 ℃.

关 键 词：钴 乙苯 杂多化合物 过氧化氢 

分 类 号：TQ426.91[化学工程] O643.3[理学—物理化学]