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:
Jul. 01, 1980
Filed:
Feb. 10, 1978
Marc D Piteau, Mennecy, FR;
Thierry A Malfroot, Saint Germain les Corbeil, FR;
Societe Nationale des Poudres et Explosifs, Paris, FR;
Abstract
The invention relates to a process for the industrial scale synthesis of vinyl and isopropenyl chloroformates and thiochloroformates. According to the invention, phosgene or thiophosgene is reacted, at between 20.degree. and 70.degree. C., with a mercury salt XHg(CH.sub.2 CRO), in which X=Cl or --CH.sub.2 CRO, where R=H or CH.sub.3, in the presence of a solvent or a mixture of solvents having a dielectric constant greater than 10. The process can also be carried out using a mixture of the above solvents with a solvent which is not effective by itself (solvent of low polarity) but which is inexpensive. The yields achieved can exceed 90%.