苯乙烯装置反烃化反应末期操作工况的优化

Optimization of Operating Conditions at the End of Dealkylation Reaction in Styrene Monomer plant

为解决苯乙烯装置反烃化反应末期多乙苯转化率下降的问题，对操作工况进行试验：反应温度为４４１℃～４４５℃、苯进料量１６２０～１８１０ｍ３／ｈ、多乙苯进料中乙苯浓度１％、反应压力６００ｋＰａ，试验结果：多乙苯转化率大于等于５０％，延长了催化剂的运行寿命，使能耗降低、选择性提高。

To solve the problem of polyethyl benzene conversion rate decrease at the end of dealkylation reaction in S.M.plant, experiment to the operating conditions is carried out with reaction tempreture 441℃-445℃,benzene feed rate 1 620-1 810 m3/h,ethylbenzene concentration in polyethyl benzene feed is 1%,reaction pressure 600kPa.The experment result is the conversion rate of polyethyl benzene being greater than or equal to 50%,while the service life of catalyst being prolonged, and energy consumption decreased and selectivity improved.