Commercial chromatography for more than two components

Abstract

Abstract SAID CONTACTING BEING CONDUCTED AT TEMPERATURES IN THE RANGE OF 25 TO 200*C. AND CARRIED OUT AT A FEED RATE GREATER THAN ABOUT 2 TIMES THE MAXIMUN FEED RATE AT WHICH THREE COMPONENTS CAN BE SEPARATED PURE IN A SINGLE COLUMN CHROMATOGRAPHIC COLUMN; (B) PASSING THROUGH SAID CHROMATOGRAPHIC COLUMN AN ELUENT SELECTED FROM THE GROUP CONSISTING OF AROMATICS AND SUBSTITUTED AROMATICS; (C) RECOVERING FROM SAID FIRST CHROMATOGRAPHIC COLUMN A STREAM CONTAINING ETHYLBENZENE AND PARAXYLENE AND A STREAM OR STREAMS CONTAINING A MIXTURE OF MXYLENE, O-XYLENE, ETHYLBENZENE AND P-XYLENE; ABD (D) RECYCLING AT LEAST A PORTION OF SAID STREAM CONTAINING M-XYLENE, O-XYLENE, ETHYLBENZENE AND P-XYLENE TO SAID FIRST CHROMATOGRAPHIC COLUMN; (E) PASSING A PORTION OF SAID STREAM CONTAINING ETHYLBENZENE AND P-XYLENE RECOVERED IN SAID (C) ABOVE TO A SECOND CHROMATOGRAPHIC COLUMN CONTAINING A SECOND MOLECULAR SIEVEL CONTACTING SAID STREAM WITH A SECOND MOLECULAR SIEVE UNDER ADSORPTION CONDITIONS TO EFFECT THE SELECTIVE ADSORPTION OF ONE OF THE COMPONENTS OF SAID STREAM AND THEREBY RECOVERING FROM SAID SECOND CHROMATOGRAPHIC COLUMN ENRICHED P-XYLENE AND ETHYLBENZENE STREAMS. P-XYLENE A META-XYLENE IN THE RANGE OF FROM ABOUT 1 TO P-XYLENE A ETHYLBENZENE OF GREATER THAN ABOUT 2 AND AN P-XYLENE A META-XYLENE 1. AN ELUTION CHROMATOGRAPHY PROCESS FOR SEPARATING A PURE P-XYLENE/ETHYLBENZENE FRACTION FROM A C8 AROMATIC MIXTURE CONTAINING P-XYLENE AND ETHYLBENZENE WHICH COMPRISES: (A) CONTACTING SAID C8 AROMATIC ISOMER MIXTURE IN THE LIQUID PHASE IN A FIRST CHROMATOGRAPHIC COLUMN WITH A MOLECULAR SIEVE; SAID SIEVE HAVING AN D R A W I N G

Inventors

• 👤 E Magee
• 👤 F Healy

Bibliographic Details