Patents by Inventor Daniel Christopher Merkel

Daniel Christopher Merkel 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).

  • Purified 1,1,1,3,3,3-hexafluoropropane and method for making same
    Patent number: 6274779
    Abstract: A 1,1,1,3,3,3-hexafluoropropane product of greater than about 99.9 weight percent purity containing less than about 100 parts per million unsaturated fluorocarbons and a method for its purification from a distillation mixture of 1,1,1,3,3,3-hexafluoropropane with at least one unsaturated fluorocarbon which method includes the steps of: a) reacting the mixture with chlorine to saturate the unsaturated fluorocarbons, b) washing the reacted mixture with an aqueous solution to remove residual hydrochloric acid and chlorine, c) removing the aqueous solution, and d) distilling the reacted mixture to obtain a 1,1,1,3,3,3-hexafluoropropane product of greater than about 99.9 weight percent purity containing less than about 100 parts per million unsaturated fluorocarbons.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: August 14, 2001
    Inventors: Daniel Christopher Merkel, Addison Miles Smith, Kim Marie Fleming
  • Process for separating hydrogen fluoride from fluorocarbons
    Patent number: 5918481
    Abstract: The invention provides a method for separating fluorocarbons from mixtures of fluorocarbon and hydrogen fluoride. In particular, the invention provides a method for separating fluorocarbons, such as pentafluoropropane, from azeotropic mixtures of the fluorocarbon and hydrogen fluoride using compositional variations with pressure.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: July 6, 1999
    Assignee: AlliedSignal Inc.
    Inventors: Hang Thanh Pham, Rajiv Ratna Singh, Hsueh Sung Tung, Daniel Christopher Merkel, David Goldschmidt, Tadeusz Piotr Rygas
  • Process for preparing hydrofluorocarbons
    Patent number: 5902912
    Abstract: A process for producing a hydrofluorocarbon (HFC) comprising (a) providing a fluoropolymer-lined reactor; (b) adding a chlorinated organic compound in liquid phase and a fluorination agent to the reactor; and (c) reacting at least a portion of the chlorinated organic compound with at least a portion of the fluorination agent to produce the HFC.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: May 11, 1999
    Assignee: AlliedSignal Inc.
    Inventors: Hsueh Sung Tung, Daniel Christopher Merkel, Addison Miles Smith
  • Purified 1,1,1,3,3,3-hexafluoropropane and method for making same
    Patent number: 5856595
    Abstract: A 1,1,1,3,3,3-hexafluoropropane product of greater than about 99.9 weight percent purity containing less than about 100 parts per million unsaturated fluorocarbons and a method for its purification from a distillation mixture of 1,1,1,3,3,3-hexafluoropropane with at least one unsaturated fluorocarbon which method includes the steps of:a) reacting the mixture with chlorine to saturate the unsaturated fluorocarbons,b) washing the reacted mixture with an aqueous solution to remove residual hydrochloric acid and chlorine,c) removing the aqueous solution, andd) distilling the reacted mixture to obtain a 1,1,1,3,3,3-hexafluoropropane product of greater than about 99.9 weight percent purity containing less than about 100 parts per million unsaturated fluorocarbons.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: January 5, 1999
    Assignee: AlliedSignal Inc.
    Inventors: Daniel Christopher Merkel, Addison Miles Smith, Kim Marie Fleming