杂多化合物催化性能的研究 在相转移条件下Na_2HPW_(12)O_(40)在苯乙烯氧化反应中的催化作用  

STUDY ON CATALYTIC PROPERTY OF HETEROPOLY COMPOUNDS:CATALYTIC BEHAVIOR OF Na_2HPW_(12)O_(40) IN THE OXIDATION OF STYRENE UNDER PHASE TRANSFER CONDITIONS

作　　者：马建伟[1] 叶兴凯[1] 吴越[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《Chinese Journal of Catalysis》1992年第6期475-478,共4页催化学报（英文）

基　　金：国家自然科学基金

摘　　要：杂多化合物既有配合物和金属氧化物的结构特征,又有强酸性和氧化还原性。它是具有氧化还原和酸催化功能的双功能催化剂。另外,它还具有结构确定、再生速度快、活性高、不腐蚀设备和污染少等优点,被认为是继分子筛之后,最有研究价值和开发前景的催化剂之一。The kinetics of oxidation of styreno catalyzed by Na2HPW12O40 under phase transfer condition has been studied. The reaction proceeds in two stages according to the rate-determining steps. In the first stage, the rate-deter mining step occurs in water phase, the activation energy of which is about 116.8 kJ/mol, the reaction order with respect to sty-rene is zero. In the second stage, the rate-determining step occurs in the organic phase, Ea=38.3kJ/mol, first order is fitted with respect to both styrene and the catalyst. The kinetic curve is 'S' in shape. Base on the kinetic study and the characteristics of two-phase reaction and the information of the isolated compounds, a possible reaction mechanism has been suggested.

关 键 词：杂多化合物 催化性能 苯乙烯 

分 类 号：O643.36[理学—物理化学]