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:
Aug. 05, 1997
Filed:
Aug. 18, 1995
Hsueh Sung Tung, Getzville, NY (US);
Paul Gene Clemmer, Williamsville, NY (US);
Gustavo Cerri, Boonton, NJ (US);
Yuon Chiu, Denville, NJ (US);
Stanley Michael Jaskot, Baton Rouge, LA (US);
Nemesio Rogelio Viso, Baton Rouge, LA (US);
Addison Miles Smith, Amherst, NY (US);
Jeffrey Warren McKown, East Aurora, NY (US);
Jay Philip Friedenson, Randolph, NJ (US);
AlliedSignal Inc., Morris County, NJ (US);
Abstract
This invention relates to a process for producing 1,1,1,2-tetrafluoroethane (HFC-134a). The process reacts, 1,1,1-trifluoro-2-chloroethane (HCFC-133a) and hydrogen fluoride in a first reactor. The product resulting from the first reaction step is brought to a second reactor together with trichloroethylene and hydrogen fluoride. The second reaction is conducted at a higher temperature than the first reactor. Optionally, HCl is removed prior to removal of the crude HFC-134a product. Unreacted HCFC-133a, trichloroethylene and hydrogen fluoride may be recycled back to the first reactor.