公开(公告)号：US4368347A

公开(公告)日：1983-01-11

申请号：US214286

申请日：1980-12-08

申请人： Sergio Carra ,  Elio Santacesaria ,  Massimo Morbidelli ,  Franco Codignola ,  Lucio DiFiore

发明人： Sergio Carra ,  Elio Santacesaria ,  Massimo Morbidelli ,  Franco Codignola ,  Lucio DiFiore

IPC分类号： C07C7/12 ,  C07C7/13 ,  C07C7/14 ,  G01N30/02

CPC分类号： C07C7/13 ,  G01N30/02

摘要： A process for the separation of metaxylene from aromatic C.sub.8 hydrocarbons, particularly from ethylbenzene and paraxylene, wherein a first phase is provided in which the mixture of aromatic hydrocarbons is selectively adsorbed, in vapor phase, into a catalytic bed consisting of zeolite of the Y type, preliminarily exchanged with potassium, and in a second phase a desorption is effected with a suitable solvent. The process, carried out at a temperature of 150.degree. to 200.degree. C. and preferably at atmospherical pressure, permits the recovery of metaxylene, substantially pure and at a concentration much higher than that of the starting mixture.

摘要翻译： 一种从芳烃C8烃，特别是乙苯和对二甲苯中分离间二甲苯的方法，其中提供了一种第一相，其中芳族烃的混合物以汽相方式被选择性地吸附到由Y型沸石组成的催化床中 ，用钾初步交换，在第二阶段用合适的溶剂进行解吸。 该方法在150℃至200℃的温度下进行，优选在大气压下进行，可以回收基本上纯的和以比起始混合物高的浓度的间二甲苯。