Process for the separation of metaxylene from mixtures of aromat

Details Process for the separation of metaxylene from mixtures of aromat Process for the separation of metaxylene from mixtures of aromat

1980-12-08

1983-01-11

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

585826, 585820, 208310Z, C07C 712, C07C 714

Patent

active

043683479

ABSTRACT:
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.

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