WO_(2.90)在烯烃催化氧化反应中的应用  

The Applications of WO_(2.90) in the Oxidation of Alkenes

作　　者：蔡显鄂[1] 俞 朱京[1] 庄承群 王迅 Cai Xiane Yu Lianmin;Zhu Jing;Zhuang Chengqunf;Wang Xun(Department of Chemistry,Fudan University,Shanghai;Institute of Modern Physios,Fudan University,Shanghai)

机构地区：[1]复旦大学化学系 [2]复旦大学现代物理研究所

出　　处：《高等学校化学学报》1986年第2期171-173,共3页Chemical Journal of Chinese Universities

摘　　要：本文研究大表面积的WO_(2.90)对丙烯的热脱附作用,并以丙烯和环己烯作为直链和环状烯烃的典型化合物,初步探讨其催化氧化性质。 (一) 实验部分 1.热脱附谱 系统用不锈钢制成,极限真空度可达4×10^(-10)乇.吸附时丙烯的压强为10^(-6)—10^(-4)乇。吸附一定时间后将真空室中的丙烯抽去,然后对WO_(2.90)样品加热.用四极质谱计监测质荷比41的烯丙基离子的相对含量。WO_(2.90) , with a larger specific surface area of 30m^(2)/g, was preparated by the method of "Inner Reduction". When it was applied to the oxidation of cyclo-hexcnc, selectivity for benzene was more than 95%. This was a second order reaction with an approximate activation energy of 57kJ/mol. Acrolein was formed at 300℃ in the catalytic oxidation of propylene, and the yield was 3.7% at 450℃. It was found that there was only one adsorpted state of propylene on the surface of WO_(290) and desorption take place at a maximum temperature of about 360K by TPD method. This desorption was a first order reaction with an approximate activation energy of 41 kJ/mol.

关 键 词：催化氧化反应 四极质谱计 热脱附谱 极限真空度 质荷比 环己烯 真空室 烯丙基 

分 类 号：TQ2[化学工程—有机化工]