国产RAX-2000A型对二甲苯吸附剂小型模拟移动床实验

分别以齐鲁石化和扬子石化吸附分离装置混合二甲苯为原料、对二乙苯为解吸剂,对国产RAX-2000A型对二甲苯吸附剂进行3.2L小型模拟移动床评价实验。通过调整装置区域回流比,优化操作工艺参数,考察RAX-2000A型对二甲苯吸附剂的吸附分离性能和各区回流比操作范围。实验结果表明,在100%进料负荷下,以齐鲁石化高乙苯含量的混合C8芳烃为原料时,对二甲苯产品的纯度大于等于99.6%,收率大于92%;以扬子石化混合C8芳烃为原料时,对二甲苯产品的纯度大于等于99.7%,收率大于97%。国产RAX-2000A型对二甲苯吸附剂的性能能够满足工业运行要求。

Adsorption Stripping of p -Xylene on RAX- 2000A Adsorbent in Small- Scale Simulated Moving Bed

Adsorption Stripping of C_8 aromatics mixture was carried out on RAX-2000A p-xylene(PX)adsorbent in(3.2L) simulated moving bed.Two kinds of C_8 aromatics feedstocks(from Yangzi and Qilu petrochemical complex)were tested.p-Diethylbenzene was used as desorbent.Zone reflux ratios,the key operation parameters,should be carefully adjusted which determined the achievement of good separation.Purity and yield of PX product were more than 99.7% and 97% with Yangzi feedstock,respectively.And for Qilu feedstock,which contained higher concentration ethylbenzene,purity and yield of PX product were more than(99.6%) and 92%.Performance of the adsorbent could meet commercial demand.