Process for adsorptive separation of metaxylene from xylene mixt

Details Process for adsorptive separation of metaxylene from xylene mixt Process for adsorptive separation of metaxylene from xylene mixt

1997-08-08

1999-05-04

Caldarola, Glenn A.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

585831, C07C 712

Patent

active

059005238

ABSTRACT:
Metaxylene is recovered from admixture with other C.sub.8 aromatic hydrocarbons including orthoxylene by liquid phase adsorptive separation using a sodium exchanged Y zeolite as the adsorbent. Performance is improved by maintaining the adsorbent in a narrow range of temperature and hydration. These conditions allow the metaxylene to be recovered in a single raffinate process without costly prefractionation for orthoxylene removal. A novel desorbent, indane, is also disclosed.

REFERENCES:
patent: 3204006 (1965-08-01), Broughton
patent: 3840610 (1974-10-01), Hedge
patent: 4306107 (1981-12-01), Broughton
patent: 4326092 (1982-04-01), Neuzil

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