Patents by Inventor Charles F. Swain

Charles F. Swain has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6630610
    Abstract: A process for producing a fluorinated organic compound comprising: (a) reacting an organic starting material with a fluorination agent in the presence of a liquid fluorination catalyst under conditions which are effective to vaporize one or more chlorinated organic by-products and to produce a gaseous product stream containing said fluorinated organic compound and said one or more chlorinated organic by-products; and (b) recovering said fluorinated organic compound from said product stream, and a system for performing the aforementioned process and recovering the chlorinated by-product.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: October 7, 2003
    Assignee: AlliedSignal Inc.
    Inventors: Charles F. Swain, Stephen A. Cottrell, Clifford Scott Riegel, Curtis A. Brescher
  • Publication number: 20010034465
    Abstract: A process for producing a fluorinated organic compound comprising: (a) reacting an organic starting material with a fluorination agent in the presence of a liquid fluorination catalyst under conditions which are effective to vaporize one or more chlorinated organic by-products and to produce a gaseous product stream containing said fluorinated organic compound and said one or more chlorinated organic by-products; and (b) recovering said fluorinated organic compound from said product stream, and a system for performing the aforementioned process and recovering the chlorinated by-product.
    Type: Application
    Filed: March 6, 2001
    Publication date: October 25, 2001
    Inventors: Charles F. Swain, Stephen A. Cottrell, Clifford S. Riegel, Curtis A. Brescher
  • Patent number: 6156944
    Abstract: A process for the separation of mixtures containing halocarbons and hydrogen fluoride. Either water alone or a blend comprising water and hydrogen fluoride is added to a mixture comprising a halocarbon and hydrogen fluoride to thereby form a first phase rich in the halocarbon and a second phase rich in hydrogen fluoride and water. The most preferred halocarbon is 1,1,1,3,3-pentafluoropropane. Preferably, the first and second phases are then separated. Optionally, the second phase rich in hydroger fluoride and water is also separated.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: December 5, 2000
    Assignee: Honeywell International Inc.
    Inventors: Hang T. Pham, Rajiv R. Singh, Charles F. Swain, Michael Van Der Puy
  • Patent number: 5545778
    Abstract: A process for the preparation of one or more of CHClFCF.sub.3 (HCFC-124), CHF.sub.2 CClF.sub.2 (HCFC-124a) and CHF.sub.2 CF.sub.3 (HFC-125) by reaction of perchloroethylene with hydrogen fluoride in a single stage reaction vessel in the presence of a fluorination catalyst. These compounds are useful in a variety of industrial applications including blowing agents, refrigerants, sterilant gases and solvent applications. Distilling the reaction product produces a distillate comprising HCl, CHClFCF.sub.3, CHF.sub.2 CClF.sub.2 and CHF.sub.2 CF.sub.3 and a minor amount of HF which distillate is scrubbed to remove the acids. The bottoms product comprises perchloroethylene, hydrogen fluoride and organic by-products which is phase separated to sequester the hydrogen fluoride from the mixture of perchloroethylene and organic by-products. The hydrogen fluoride and mixture of perchloroethylene with organic by-products are then preferably re-mixed at a controlled rate and recycled to the reaction vessel.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: August 13, 1996
    Assignee: AlliedSignal Inc.
    Inventors: Hsueh S. Tung, Addison M. Smith, Charles F. Swain
  • Patent number: 5545775
    Abstract: 1,1-difluoroethane is produced by the reaction of 1,2-dichloroethane with anhydrous hydrogen fluoride in a liquid phase and in the presence of a Lewis acid. Preferably the Lewis acid is tin, antimony, titanium, molybdenum, tungsten, niobium or tantalum halide or a mixture thereof.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: August 13, 1996
    Assignee: AlliedSignal Inc.
    Inventors: Alagappan Thenappan, Charles F. Swain, Matthew H. Luly