Separation of bi-alkyl substituted monocyclic aromatic isomers

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

1976-11-11

1977-09-27

Gantz, Delbert E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

208310Z, C07C 713

Patent

active

040511928

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 X or a Y zeolite containing selected cations at exchangeable cationic sites 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 counter-current flow system.

REFERENCES:
patent: 3133126 (1964-05-01), Fleck et al.
patent: 3201491 (1965-08-01), Stine et al.
patent: 3558730 (1971-01-01), Neuzil

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