E.i. Dupont De Nemours and Company

Edwin J Warwas

Leo E Manzer

V N Rao

Michael A Sisk

Richard T Rockwell

Roy Winteringham

Allen Capron Sievert

Mario Joseph Nappa

Munirpallam Appadorai Subramanian

Barry Asher Mahler

Velliyur Nott Rao

V N Mallikarjuna Rao

Compositions comprising hydrofluorocarbons and their manufacture

Process for the manufacture of halogenated propanes containing

Production of 2-chloro-2-hydrohexafluoropropane and azeotropes thereof

Azeotropes of HF and 2,2-dichloro-1,1,1-trifluoroethane and of HF and 2-chloro-1,1,1,2-tetrafluoroethane. Process for the separation of hydrogen fluoride (HF), 2,2-dichloro-1,1,1-trifluoroethane (FC-123), and/or 2-chloro-1,1,1,2-tetrafluoroethane (FC-124) from mixtures containing them by controlling the molar ratio of HF/FC-123 in the mixture prior to subjecting the mixture to azeotropic distillation.

Azeotropes of HF and process for the separation of HF via azeotropic

Process for the separation of hydrogen fluoride (HF), 2,2-dichloro-1,1,1-trifluoroethane (FC-123), and/or 2-chloro-1,1,1,2-tetrafluoroethane (FC-124) from mixtures containing them by controlling the molar ratio of HF/FC-123 in the mixture prior to subjecting the mixture to azeotropic distillation.

Process for the separation of HF via Azeotropic distillation

Process for the separation of HF, 2,2-dichloro-1,1,1-trifluoroethane (FC-123) and/or 2-chloro-1,1,1,2-tetrafluoroethane (FC-124) mixture by subjecting the mixture to a temperature from about -80.degree. C. to about 40.degree. C. and a pressure from about 0.10 MPa to about 3.55 MPa in a separation zone, whereby an organic phase having less than 15 mole percent of HF is formed as the bottom layer in the separation zone and an acid phase having at least 93 mole percent of HF is formed at the top in the separation zone.

Process for the separation of HF via phase separation and distillation

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Wilmington, DE, United States of America

Edwin J Warwas