Process for the separation of di-substituted benzene

Details Process for the separation of di-substituted benzene Process for the separation of di-substituted benzene

1983-07-18

1984-08-21

Sebastian, Leland A.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

210670, 260465R, 564424, 568932, 568940, C07C 7912, C07C 7910

Patent

active

044671261

ABSTRACT:
An adsorptive separation process for separating the para-isomers of a di-substituted benzene from a feed mixture comprising the para-isomer and at least one other isomer. One substituted group is NO.sub.2 -- and the other group is a normal hydrocarbon having less than 6 carbon atoms per molecule, the halogens, NH.sub.2 --, NO.sub.2 -- or C.tbd.N--. The process comprises contacting the feed mixture with an adsorbent comprising crystalline silica having a silica/alumina mole ratio of at least 12, selectively adsorbing substantially all of the para-isomer to the substantial exclusion of the remaining isomers and thereafter recovering high-purity para-isomer by means of desorption with an appropriate desorbent material.

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