摘要
在常压氧、110℃的反应条件下,考察了不同过渡金属盐及乙酰丙酮络合物在乙苯液相氧化中的催化作用,其中钴的苯甲酸盐和乙酰丙酮络合物的活性较高,Co(acac)3的催化活性高于Co(acac)2。Co(acac)2在乙苯的液相催化氧化反应中的诱导期比Co(acac)3长,因此推测Co(Ⅲ)可能是反应过程中的活性物种。反应速度随Co(acac)3用量的增大而加快,表明反应可能是通过配位-链锁机理进行的。
The catalytic behavior of various transition metal salts and acetylacetonate in liquid phase oxidation of ethylbenzene has been investigated at 110 ℃ under atmospheric pressure of oxygen The catalytic activity of Co(acac) 3 is higher than that of Co(acac) 2 The induction period of Co(acac) 2 is longer than that of Co(acac) 3 Therefore,the active species may be Co(Ⅲ) The increasing amount of Co(acac) 3 enhances the reaction rate,indicating that the mechanism proceeds with a radical chain process
出处
《石油化工》
CAS
CSCD
北大核心
1998年第12期877-879,共3页
Petrochemical Technology
关键词
催化
氧化
乙苯
过渡金属盐
配合物
液相氧化
catalytic oxidation,ethylbenzene,tansition metal acetylacetonate,transition metal salt