Alliedsignal Inc.

Jay Philip Friedenson

Hsueh Sung Tung

Yuon Chiu

Gustavo Cerri

Addison Miles Smith

Jeffrey Warren McKown

Paul Gene Clemmer

Stanley Michael Jaskot

Nemesio Rogelio Viso

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.

Process for the manufacture of 1,1,1,2-tetrafluoroethane

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Randolph, NJ, United States of America

Jay Philip Friedenson