Separation of aromatic mixtures

Abstract

Abstract A PROCESS FOR THE SEPARATION AND MANUFACTURE OF COMPONENTS FROM A C8-AROMATICS MIXTURE, INCLUDING PARAXYLENE, META-XYLENE AND ORTHO-XYLENE BY SUBJECTING THE MIXTURE TO A CHROMATOGRAPHIC SEPARATION TO REMOVE ANY ETHYLBENZENE AND MOST OR ALL OF THE PARA-XYLENE, DISTILLING THE RESULTANT MIXTURE IN A FIRST DISTILLATION STATION TO RE MOVE A PORTION OF THE META-XYLENE; DISTILLING THE RESIDUE IN A SECOND DISTILLATION STATION TO REMOVE THE REMAINDER OF THE META-XYLENE AND SOME OF THE ORTHO-XYLENE AND PASSING THIS DISTILLATE TO AN ISOMERIZATION STATION, REMOVING THE RESIDUE TO A THIRD DISTILLATION STATION AND DISTILLING THE ORTHO-XYLENE THEREFROM; ISOMERIZING SAID DISTILLATE FROM THE SECOND DISTILLATION STATION FOR PARA-XYLENE FORMATION. CHROMATOGRAPHICALLY SEPARATING THE MIXTURE FROM THE ISOMERIZATION TO REMOVE PARA-XYLENE AND RECYCLING THE REMAINING MIXTURE TO THE FIRST DISTILLATION STAGE. THE PROCESS CAN BE PRACTICED WITH (1) OMISSION OF ORTHO-XYLENE PRODUCTION BY BY-PASSING THE THIRD DISTILLATION STATION, (2) OMISSION OF META-XYLENE PRODUCTION BY BY-PASSING THE FIRST DISTILLATION STATION, OR (3) OMISSION OF BOTH ORTHOAND META-XYLENE PRODUCTION BY-PASSING THE FIRST AND THIRD DISTILLATION STATIONS.

Inventors

• 👤 C Meyers

Bibliographic Details