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. 08, 1987
Filed:
Jun. 27, 1986
Applicant:
Inventor:
Harold S Bruner, Jr, Hockessin, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560204 ; 560190 ; 562590 ;
Abstract
Production of dialkyl adipate by reaction of butadiene, carbon dioxide, and a lower alkyl alcohol in the presence of a cobalt catalyst and a tertiary nitrogen base cocatalyst to form a liquid mixture containing alkyl 3-pentenoate, adding alkanoic acid to the mixture in an amount sufficient to keep the cobalt catalyst active, and then reacting the mixture to form dialkyl adipate. The acid addition increases the rate of reaction relative to catalyst deactivation rate and reduces the consumption of the tertiary nitrogen base cocatalyst.