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. 18, 1989
Filed:
Mar. 22, 1988
Applicant:
Inventors:
David L Cresswell, Christleton, GB;
Eric W Sims, Widnes, GB;
Assignee:
Imperial Chemical Industries plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
570159 ; 422200 ; 422239 ;
Abstract
Production of tetrafluoroethylene and hexafluoropropylene in very high combined selectivity by pyrolysis of chlorodifluoromethane, optionally using gaseous diluent wherein the pyrolysis is effected under substantially isothermal and uniform conditions, the reaction temperature is within the range 750.degree.-980.degree. C. (preferably 800.degree.-980.degree. C.), and the gaseous residence time is within the range 1 to 50 milliseconds. A fluidphase electromagnetic induction reactor suitable for effecting the process is described.