【摘要】 <正> 二乙烯基苯是最通用的交链剂,在塑料及合成橡胶工业上多用二乙烯基苯来改进产品的机械强度、耐热等性能。此外二乙烯基苯在合成离子交换树脂时也很重要。 制备二乙烯基苯的方法很多,但最适于工业生产的就是二乙苯高温催化脱氢,除更多还原

【Abstract】 A systematic study of catalytic dehydrogenation of diethylbe;izene in the presence of ZnO type catalyst by varying temperature, rate and dilution ratio was undertaken. The most favorable condition was found to be at 600-640℃ with a rate of feeding at 1.96 L. H. S. V. or higher and dilution ratio (DEB: H2O in mole ratio) of 1:2.8-12.1. The highest yield of divinylbenzene in the dehydrogenated mixture was 10.4%.A new gravimetric analytical method to determine the different constituents in the mixture was described. In comparing with standard sample, the possible error was estimated to be around ±2%. The amount of side chain fission in the dehydrogenation process has been discussed especially in relating to the rate of feeding and the reation temperature.更多还原