Atochem

Sisas S.p.a.

Sergio Carra

Massimo Morbidelli

Raymond Commandeur

Bernard Jean Gurtner

Renato Paludetto

Franco Codignola

Elio Santacesaria

Giuseppe Storti

Lucio DiFiore

Guiseppe Storti

The process for the separation of isomeric dichlorotoluenes, comprising the steps of:

Process for the separation of isomeric dichlorotoluenes

A process for separating dichlorotoluene isomers from a mixture containing at least two dichlorotoluene isomers comprising

Process for separating isomeric dichlorotoluenes by adsorption

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.

Process for the separation of metaxylene from mixtures of aromatic

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Milan, Italy

Sergio Carra