Adsorptive separation process

Details Adsorptive separation process Adsorptive separation process

1986-04-03

1988-09-27

Lone, Werren B.

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

Organic compounds

Halogen containing

570202, C07C 1738

Patent

active

047743719

ABSTRACT:
A specific isomer of a trisubstituted benzene is continuously separated from a mixture containing at least two isomers of the trisubstituted benzene by adsorptive separation using a simulated moving bed, wherein a faujasite type zeolite adsorbent is used as the adsorpent and the specific isomer is separated as the extract component in the presence of a substituted benzene compound. The specific isomer to be separated is, for example, 2,6-dichlorotoluene, 3,5-dichlorotoluene and 2-chloro-m-xylene. The substituted benzene compound is preferably a compound represented by the formula: ##STR1## wherein R.sup.1 is H or CH.sub.3, R.sup.2 is H, CH.sub.3 or Cl and R.sup.3 is CH.sub.3 or Cl, with the proviso that the case where R.sup.1 is CH.sub.3, R.sup.2 is Cl and R.sup.3 is Cl is excluded.

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