为了实现C₉芳烃中对甲乙苯资源的高效利用，以X型分子筛为吸附剂，以混合甲乙苯为原料，采用液相模拟移动床吸附工艺分离对甲乙苯（p-MEB）与邻甲乙苯（o-MEB）、间甲乙苯（m-MEB）。在操作温度为75℃、操作压力为0.25 MPa的条件下，在液相模拟移动床吸附分离装置上考察了操作条件对p-MEB吸附分离过程的影响规律，获得优化的p-MEB吸附分离工艺条件为：模拟移动床区域分布采用6-3-4-3模式，切换时间900 s，分配比1.1，循环比3.5，脱附剂比9.3。对于p-MEB质量分数为20.78%的C₉芳烃，优化分离工艺条件下得到的p-MEB质量分数为94.52%，回收率达到90.86%。

In order to realize the efficient utilization of p-methyl ethyl benzene (p-MEB) resources in C₉ aromatics,the separation process of p-MEB,o-methyl ethyl benzene (o-MEB) and m-methyl ethyl benzene (m-MEB) is studied by using liquid phase simulated moving bed adsorption separation technology with X-type molecular sieves as adsorbent and mixed methyl ethyl benzene as raw material.Under the conditions of operating temperature at 75℃ and operating pressure at 0.25 MPa,the influence rules of operating conditions on the adsorption separation process of p-MEB are investigated in a liquid-phase simulated moving bed adsorption separation device.At the same time,the SMB module of Aspen Chromatography is used to simulate and verify the rules under the experimental conditions.The optimum conditions for p-MEB adsorption separation process are as follows:the simulated moving bed adopts 6-3-4-3 mode in regional distribution,switching time is 900 s,distribution ratio is 1.11,circulation ratio is 3.5 and desorption agent ratio is 9.3.As for C₉ aromatics containing 20.78% of p-MEB,the purity of p-MEB product obtained from the optimal separation process conditions can reach 94.52% and the recovery rate can achieve 90.86%.

叶磊(1994-),男,硕士生