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:
Jul. 14, 1992
Filed:
Apr. 08, 1991
Applicant:
Inventor:
T Thomas Shih, Bryn Mawr, PA (US);
Assignee:
Arco Chemical Technology, L.P., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
203 64 ; 203 68 ; 549541 ; 549542 ;
Abstract
A method is provided for the separation by extractive distillation of hydrocarbon impurities from lower alkylene oxides such as propylene oxide wherein a glycol having 2 to 5 carbon atoms is used as extractive solvent.