Dawson型磷钼钒杂多酸盐催化合成二苯基甲烷  

Dawson-type P-Mo-V Heteropolyacid Salt Catalyst in the Synthesis of Diphenylmethane

作　　者：范宗良[1] 魏慧娟[1] 李贵贤[1] 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

出　　处：《精细化工》2015年第5期543-547,共5页Fine Chemicals

摘　　要：合成了Dawson型磷钼钒杂多酸盐Fe2H2P2Mo16V2O62·41H2O,采用感耦等离子体发射光谱(ICP)、傅里叶变换红外光谱(IR)、X射线衍射(XRD)、热重分析(TG)表征了杂多酸化合物的结构,并将其用于苯与氯化苄烷基化合成二苯基甲烷的反应中。考察了反应物的用量、催化剂用量、反应温度、反应时间对烷基化反应的影响。结果表明,在催化剂用量为0.1 g,氯化苄用量为10 mmol,苯与氯化苄的摩尔比n(C6H6)∶n(C7H7Cl)=6∶1,反应时间1 h,反应温度80℃的条件下,氯化苄的转化率达到99.5%,二苯基甲烷的选择性达到98.7%。Fe2H2P2Mo16V2O62·41H2O催化剂表现出了很好的催化活性。The heteropolyacid salt Fe2 H2 P： Mo16 V2 O62 ·41 H2O catalyst was prepared, and characterized by means of inductive coupling plasma emission spectrum, Fourier transform infrared spectroscopy, X- ray powder diffraction, and thermal analysis. In this work, the catalytic activity was studied for the alkylation of benzene with benzyl chloride to diphenylmethane. The influences of different parameters such as the amount of reactants, the reaction temperature, and the reaction time on alkylation of benzene were also investigated. Experimental results show that Fe2H2P2Mo16 V2O62was found to be a suitable catalyst for the alkylation of benzene with benzyl chloride to diphenylmethane. A maximum of conversion of benzyl chloride was obtained to be 99.5% with a selectivity of 98.7% for diphenylmethane under the optimized reaction conditions over Fe2H2P2Mo16V2O62 · 41H2O catalyst.

关 键 词：杂多酸 二苯基甲烷 苯 氯化苄 烷基化 催化与分离提纯技术 

分 类 号：TQ426.91[化学工程]