二乙苯催化脱氢反应的研究  

Study on catalytic dehydrogenation of diethylbenzene

作　　者：危春玲[1] 宋磊[1] 缪长喜[1] Wei Chunling;Song Lei;Miao Changxi(Shanghai Research Institute of Petrochemical Technology,SINOPEC,Shanghai 201208,China)

机构地区：[1]中国石化上海石油化工研究院,上海201208

出　　处：《工业催化》2020年第8期78-84,共7页Industrial Catalysis

摘　　要：采用Fe 2 O 3-K 2 O氧化物催化剂,针对二乙苯脱氢制二乙烯基苯过程进行反应特性研究及工艺参数优化,对二乙苯脱氢反应产物分布的影响因素进行分析。XRD测试结果表明,催化剂体相中明显含有K 2 Fe 10 O 16和K 2 Fe 22 O 34两种多铁酸钾晶相时,催化剂的活性较好。工艺条件试验表明,提高反应温度和水与二乙苯质量比,可以提高二乙苯转化率,降低产物中单双烯比值,提高二乙烯基苯产物的间对比。分析了反应过程中异构体的影响,发现间位和对位二乙苯总脱氢的能力差异不大,且反应过程中不出现异构化转变,但以间二乙苯为原料时,其脱氢容易停留在第一步获得乙基乙烯苯,而对位二乙苯的脱氢较容易获得二乙烯基苯。The catalytic reaction,operation parameter optimization and factors affecting product distribution for diethylbenzene(DEB)dehydrogenation to divinylbenzene(DVB)over Fe 2 O 3-K 2 O catalyst were studied.X-ray diffraction results showed that when K 2 Fe 22 O 34 and K 2 Fe 10 O 16 spinel phases of the catalysts were involved,the performance of the catalysts was promoted.The experimental results showed that,with the increasing reaction temperature and steam-to-oil mass ratio,the conversion of diethylbenzene was increased,the ratio of ethylvinylbenzene to divinylbenzenen was decreased and the ratio of m-divinylbenzenen to p-divinylbenzenen was improved.During the dehydrogenation reaction,there were no isomerization side reactions and the total conversion of m-ethylbenzenen and p-ethylbenzenen was almost similar.However,compared with the distribution products between dehydrogenation of m-diethylbenzene and p-diethylbenzene,it was found that m-diethylbenzene dehydrogenation was easier to get m-ethylvinylbenzene,but the p-diethylbenzene dehydrogenation was easier to get p-divinylbenzenen.

关 键 词：精细化学工程 二乙苯脱氢 乙基乙烯苯 二乙烯基苯 工艺参数 

分 类 号：O643.36[理学—物理化学] TQ241.2[理学—化学]