ROGER R ELLEFSON
Engineers in Wilmington, DE
License number
Pennsylvania PE038516E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Wilmington, DE 19810
Pennsylvania
Pennsylvania
Professional information
Manufacture Of Butanedicarboxylic Acid Esters
US Patent:
4618702, Oct 21, 1986
Filed:
Jan 24, 1985
Appl. No.:
6/694679
Inventors:
Michael B. D'Amore - Wilmington DE
Roger R. Ellefson - Wilmington DE
Roger R. Ellefson - Wilmington DE
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
C07C 6738
US Classification:
560204
Abstract:
Increased catalyst concentration relative to butadiene in its carboalkoxylation permits operation at reduced pressure and simplifies process steps.