The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 1984
Filed:
Nov. 16, 1981
Applicant:
Inventors:
Vijay S Bhise, Bloomfield, NJ (US);
Robert Hoch, Ridgewood, NY (US);
Assignee:
The Halcon SD Group, Inc., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07D / ;
U.S. Cl.
CPC ...
203 14 ; 203 43 ; 203 49 ; 203 67 ; 203 68 ; 203 70 ; 549541 ;
Abstract
Ethylene oxide is extracted from aqueous solutions by carbon dioxide under (near) super-critical conditions and thereafter recovered by distillation at sub-critical conditions. Improved distillation is obtained by adding to the carbon dixoide a gas (or gases) which adjust the critical temperature of the gas mixture of the top of the distillation column within the range of about 32.degree. C. to about 75.degree. C. Preferred gases are the saturated hydrocarbons, particularly propane, n-butane, isobutane and pentane.