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:
Feb. 22, 2005
Filed:
Mar. 17, 2000
Jean-pierre Senet, La Chapelle la Reine, FR;
Gérard Sennyey, Gif sur Yvette, FR;
Philippe Delabrouille, Brouy, FR;
Denis Grenouillat, Athis-Mons, FR;
Jean-Pierre Senet, La Chapelle la Reine, FR;
Gérard Sennyey, Gif sur Yvette, FR;
Philippe Delabrouille, Brouy, FR;
Denis Grenouillat, Athis-Mons, FR;
Isochem, Paris Cedex, FR;
Abstract
A method for the production of aliphatic fluoroformates, wherein carbonyl fluoride is made to react with aliphatic alcohol in the presence of sodium fluoride in ether at a temperature of −20° to 50° C. The method is carried out using carbonyl fluoride obtained by reacting phosgene with surplus powdered sodium fluoride, whereby the grains thereof have a specific surface of 0.1 m/g or more and/or an average diameter of 20 μm or less, at a temperature ranging from 25° to 120° C. The method enables unstable fluoroformates such as tertiobutyl to be obtained with excellent yields.