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:
Jun. 29, 1982
Filed:
Jun. 08, 1981
Louis G Anello, Hamburg, NY (US);
Allied Corporation, Morris Township, Morris County, NJ (US);
Abstract
The production of hexafluoroacetone by contacting, in the liquid phase, hexafluorothioacetone dimer with at least a stoichiometric amount of an aprotic solvent selected from the group consisting of dimethylacetamide, dimethylformamide, dimethyl sulfoxide and N-methyl pyrrolidone and at least a catalytic amount of an alkali metal fluoride or a sulfonic acid having general formula RSO.sub.3 H is disclosed. Dimethylformamide and dimethyl sulfoxide are the preferred aprotic solvents; KF is the preferred alkali metal fluoride; and CH.sub.3 SO.sub.3 H and pCH.sub.3 C.sub.6 H.sub.4 SO.sub.3 H are the preferred sulfonic acids. The production of hexafluoroacetone by contacting hexafluoropropene with elemental sulfur and a catalytic amount of an alkali metal fluoride in an aprotic solvent at a temperature of between about 40.degree. and about 70.degree. C. for a time sufficient to produce hexafluorothioacetone dimer combined with increasing the temperature to between about 90.degree. and 150.degree. C. and maintaining said temperature for a time sufficient to produce hexafluoroacetone is also disclosed.