Employing bottoms of a second fractionator as a refrigerant medium for first fractionator overhead

• US 3,309,882 A
• Filed: 12/17/1964
• Issued: 03/21/1967
• Est. Priority Date: 12/17/1964
• Status: Expired due to Term

• Current Assignee: Eldred J. Cabanaw
• Original Assignee: Eldred J. Cabanaw
• Inventors: Cabanaw, Eldred J.
• Application Number:
  US04/418,981
• Time in Patent Office: 824 Days
• US Class Current: 62/625
• CPC Class Codes: B01D 3/4238 Head-, side- and bottom stream
• CPC Class Codes: C07C 7/04 by distillation
• CPC Class Codes: Y10S 203/19 Sidestream
• CPC Class Codes: Y10S 62/918 Halocarbon

Claims

1. IN A METHOD FOR OPERATING A FRACTIONATION SYSTEM WHICH COMPRISES CHARGING TO A FRACTIONATION ZONE A FEED TO BE FRACTIONATED THEREIN, FRACTIONATING SAID FEED TO PRODUCE A BOTTOMS PRODUCT WHICH IS WITHDRAWN THEREFROM AND AN OVERHEAD CONTAINING GAS OR VAPOR, PASSING SAID OVERHEAD TO A COOLING ZONE, THEREIN COOLING SAID OVERHEAD, PASSING THE THUS COOLED OVERHEAD TO AN ACCUMULATION ZONE, IN SAID ACCUMULATION ZONE SEPARATING A LIQUID PHASE AND A GAS OR VAPOR PHASE CONTAINING SAID DESIRED GAS OR VAPOR, REMOVING THE LIQUID PHASE FROM SAID ACCUMULATION ZONE, PASSING AT LEAST A PORTION OF THE REMOVED LIQUID PHASE TO SAID FRACTIONATION ZONE AS REFLUX THEREFOR AND PASSING THE REMAINDER THEREOF TO A SECOND FRACTIONATION ZONE WHEREIN A BOTTOMS PRODUCT AND AN OVERHEAD PRODUCT ARE OBTAINED, PASSING GAS OR VAPOR PHASE IN SAID ACCUMULATION ZONE TO A CONDENSING ZONE WHEREIN DESIRED GAS OR VAPOR IS CONDENSED AND RECOVERED AND THE REMAINING GAS OR VAPOR REMOVED OVERHEAD FROM SAID CONDENSING ZONE, THE IMPROVEMENT WHICH COMPRISES UTILIZING AT LEAST A PORTION OF THE BOTTOMS PRODUCT FROM SAID SECOND FRACTIONATION ZONE AS A PRIMARY COOLANT IN SAID CONDENSING ZONE.