Separation of bi-alkyl substituted monocyclic aromatic isomers w

Details Separation of bi-alkyl substituted monocyclic aromatic isomers w Separation of bi-alkyl substituted monocyclic aromatic isomers w

1982-02-25

1983-12-27

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

C07C 712

Patent

active

044232799

ABSTRACT:
A process for the separation of the para-isomer from a hydrocarbon feed mixture comprising at least two bi-alkyl substituted monocyclic aromatic isomers, including the para-isomer, said isomers having from 8 to about 18 carbon atoms per molecule, which process employs an adsorbent comprising a zeolite which has been contacted at pyrolyzing conditions with a pyrolyzing agent to preferentially adsorb the para-isomer. The para-isomer thereafter is removed from the adsorbent by contacting it with a desorbent material and is recovered as a product stream. In a preferred embodiment the process uses a simulated moving-bed countercurrent flow system.

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