Aromatic separation process

• US 2,970,106 A
• Filed: 01/31/1958
• Issued: 01/31/1961
• Est. Priority Date: 01/31/1958
• Status: Expired due to Term

• Current Assignee: Robert C. Binning, Walker F. Johnston Jr
• Original Assignee: Robert C. Binning, Walker F. Johnston Jr
• Inventors: Binning, Robert C., Johnston, Walker F. Jr.
• Application Number:
  US03/712,450
• Time in Patent Office: 1,096 Days
• US Class Current: 208/347
• CPC Class Codes: C10G 31/11 by dialysis
• CPC Class Codes: Y10S 159/27 Micropores

Claims

1. A PROCESS WHICH COMPRISES CONTACTING A DISTILLATE CHARGE AROMATICS-CONTAINING HYDROCARBON MIXTURE HAVING A DEFINITE BOILING RANGE WITH ONE SIDE OF A PLASTIC PERMEATION MEMBRANE WHICH PREFERENTIALLY PERMEATES AROMATICS AND NON-AROMATICS SEPARABLE THEREFROM BY DISTILLATION, PERMEATING A PORTION OF THE CHARGE MIXTURE THROUGH SAID MEMBRANCE, SAID PERMEATED PORTION COMPRISING AROMATICS AND REDUCED CONCENTRATION OF CLOSELY BOLING NON-AROMATICS, SEPARTELY RECOVERING PERMEATED AND NONPERMEATED PORTIONS HAVING HIGHER AND LOWER CONCENTRATIONS OF AROMATICS RESPECTIVELY THAN THE CHARGE MIXTURE, AND DISTILLING THE PERMEATED PORTION TO SEPARATE A LOWER BOILING FRACTION FROM A HIGHER BOILING FRACTION WHICH HIGHER BOILING FRACTION HAS A HIGHER CONCENTRATION OF AROMATICS THAN THE PERMEATED PORTION WHICH IS PASSED TO THE DISTILLATION STEP AND A HIGHER CONCENTRATION OF AROMATICS THAN COULD BE OBTAINED BY ONLY DISTILLING THE DISTILLATE CHARGE.