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:
Apr. 25, 1995
Filed:
Jul. 29, 1994
Paul R Resnick, Wilmington, DE (US);
Allen C Sievert, Elkton, MD (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A process for the manufacture of pentafluorodimethyl ether is disclosed which involves contacting at least one starting compound selected from the group consisting of compounds having a formula (CF.sub.3 OCF.sub.2 CO.sub.2)A and compounds having he formula (CF.sub.3 OCF.sub.2 CO.sub.2).sub.2 A' wherein A is selected from the group consisting of hydrogen, ammonium, alkali metals (e.g., sodium or potassium) and R (wherein R is a C.sub.1 to C.sub.4 alkyl group) and A' is an selected from the group consisting of alkaline-earth metals (e.g., magnesium or calcium), with at least one hydroxylic compound selected from the group consisting of water, mono-alcohols of the formula R'OH (wherein R' is a C.sub.1 to C.sub.12 straight or branched chain alkyl group) and alkanediols of the formula R' (OH).sub.2 (wherein R' is a C.sub.2 to C.sub.8 alkylene group) at temperature of about 120.degree. C. to 170.degree. C.