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:
Oct. 06, 1992
Filed:
Sep. 17, 1991
Applicant:
Inventors:
Frank Schubert, Neukirchen-Vluyn, DE;
Rolf Herzog, Bottrop, DE;
Bert Meier, Menden, DE;
Jurgen Zehrfeld, Voerde, DE;
Assignee:
Rutgerswerke AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549230 ; 549228 ; 549229 ;
Abstract
A process for the preparation of 2-oxo-1, 3-dioxolanes comprises reacting an epoxy compound having at least one functional epoxy group in the optional presence of an inert solvent with carbon dioxide at 60.degree. C. to 200.degree. C. at normal pressure in the presence of a quaternary phosphonium compound as catalyst and novel quaternary phosphonium compounds useful as catalysts in the said process.