低水油比乙苯脱氢催化剂的开发

辛国萍　 金朝晖　

摘　要：分析了铁/钾配比、氧化镁、氧化铁、微量元素的氧化物及增强剂等影响乙苯脱氢催化剂性能的因素，并对它们进行了调整，开发出了能适应在低水油比条件下使用的乙苯脱氢355催化剂。工业应用表明，在乙苯加料量为1.1～1.2t/h、温度为598～618℃、液体空速为0.42～0.46h-1、水油比为1.57左右的条件下，乙苯转化率、苯乙烯收率和选择性分别为65.0％，62.5％，96.1％。催化剂还具有强度高、堆密度小、自再生能力强等特点。
关键词：乙苯；脱氢催化剂；苯乙烯；水油比；性能
分类号：TQ032.4　文献标识码：B
文章编号：1000-1255(2001)02-0078-04

Development of catalyst for ethylbenzene dehydrogenation in low water-oil ratio

Xin Guoping（Chemical Research Institute of Lanzhou Petrochemical Corporation,Lanzhou 730060,China）　
Jin Zhaohui（Chemical Research Institute of Lanzhou Petrochemical Corporation,Lanzhou 730060,China）　

Abstract：The 355 catalyst for ethylbenzene dehydrogenation used in low water-oil ratio was developed by analyzing and adjusting the factors affecting the properties of catalyst, including mass ratio of K/Fe, amount of MgO, precursor property of iron oxide, microcomponents and silicate. The results showed that in the condition of ethylbenzene feed 1.1～ 1.2 t/h, temperature 598～ 618 ℃ ,space velocity 0.42～ 0.46 h- 1,water- oil mass ratio about 1.57,the conversion of ethylbenzene was 65.0％ ,yield and selectivity of styrene were 62.5％ and 96.1％ respectively. The catalyst also had high side pressure, low bulk density and good capacity of self- generation.
Keywords：ethylbenzene ;dehydrogenation catalyst; styrene; water- oil ratio; property