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:
Sep. 26, 1995
Filed:
May. 31, 1994
Applicant:
Inventors:
Michael W Peters, Austin, TX (US);
William K Culbreth, III, Beaumont, TX (US);
Mark A Mueller, Austin, TX (US);
Assignee:
Texaco Chemical Inc., White Plains, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07D / ;
U.S. Cl.
CPC ...
203 64 ; 203 78 ; 203 80 ; 203D / ; 549541 ;
Abstract
An extractive distillation agent comprising a mixture of polyoxypropylene glycols is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water, acetone and methanol to obtain an overhead distillate anhydrous propylene oxide fraction contaminated with reduced quantities of methanol and a heavier bottoms distillation fraction containing the polyoxypropylene glycols, water and acetone and some of the methanol introduced into the distillation column.