Integrated selective adsorption and crystallization process for

Details Integrated selective adsorption and crystallization process for Integrated selective adsorption and crystallization process for

1993-04-01

1994-07-12

McFarlane, Anthony

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By plural serial diverse separations

585815, 585831, 585479, C07C 700, C07C 714, C07C 712, C07C 522

Patent

active

053290607

ABSTRACT:
The eutectic limit of para-xylene crystallization is overcome by enriching the concentration of para-xylene of the crystallization feed. This is accomplished by passing the crystallization feed stream through a selective adsorption zone to produce a para-xylene-enriched stream and a para-xylene-depleted stream. The para-xylene-depleted stream is passed to an isomerization zone to re-equilibrate the xylene mixture, thereby producing additional para-xylene. The para-xylene-enriched stream is passed to a crystallization zone to produce high purity para-xylene. The result is an increase in the overall para-xylene recovery.

REFERENCES:
patent: 3729523 (1971-04-01), Grandio, Jr. et al.
patent: 3773846 (1973-11-01), Berger
patent: 3813452 (1974-05-01), Bieser
patent: 3835198 (1974-09-01), Myers
patent: 3939221 (1976-02-01), Pearce

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