Patents Assigned to Black & Veatch Pritchard, Inc.
  • Patent number: 6564579
    Abstract: A system and process for vaporizing liquefied natural gas (LNG) and separating natural gas liquids from the LNG. The process vaporizes the LNG to produce natural gas meeting pipeline or other commercial specifications. The process in some embodiments uses a closed loop power generation system.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: May 20, 2003
    Assignee: Black & Veatch Pritchard Inc.
    Inventor: Daniel G. McCartney
  • Patent number: 6405561
    Abstract: A process for separating a feed gas stream containing methane, C2 components, C3 components, and heavier components into a volatile gas stream containing a major portion of the methane and C2 components and a less volatile stream containing a major portion of the C3 and heavier components by adjusting the temperature and pressure of the feed gas stream and charging it to a separator/absorber where the gas stream is separated into a first gas stream containing a major portion of the methane and C2 components with a minor content of C3 and heavier components and a first liquid stream containing a major portion of the C3 and heavier components with a lesser concentration of C2 and lighter components with the first liquid stream being fractionated in a deethanizer into an overhead stream and a bottoms stream with the bottoms stream containing primarily C3 and heavier components with the overhead stream containing primarily C2 and lighter components being at least partially condensed and separated into a liquid re
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: June 18, 2002
    Assignee: Black & Veatch Pritchard, Inc.
    Inventors: Robert A. Mortko, Kevin L. Currence
  • Patent number: 6367286
    Abstract: A system and a method for efficiently removing natural gas liquids from a natural gas stream at an elevated pressure and liquefying the natural gas stream at an elevated pressure by use of a turbo expander and a compressor.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: April 9, 2002
    Assignee: Black & Veatch Pritchard, Inc.
    Inventor: Brian C. Price
  • Patent number: 5935548
    Abstract: A method and apparatus for removing hydrogen sulfide from a molten sulfur stream containing hydrogen sulfide and hydrogen polysulfides by mixing the molten sulfur stream with a degassed molten sulfur stream in an eductor to form a mixture, contacting the mixture with a finely dispersed gaseous oxidant stream, separating hydrogen sulfide from the mixture and recovering molten sulfur having a reduced hydrogen sulfide content.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: August 10, 1999
    Assignee: Black & Veatch Pritchard, Inc.
    Inventors: David A. Franklin, Nathan A. Hatcher
  • Patent number: 5904910
    Abstract: A method for producing hydrogen and sulfur from a first gaseous mixture containing hydrogen sulfide and ammonia by separating ammonia from the first gaseous mixture to produce a second gaseous mixture containing hydrogen sulfide; combusting a portion of the hydrogen sulfide in the second gaseous mixture to produce a third gaseous mixture containing hydrogen sulfide and sulfur dioxide; heating the ammonia to a temperature of at least 1800.degree. F. to produce a fourth gaseous mixture containing nitrogen and hydrogen; and, combining the third gaseous mixture and the fourth gaseous mixture and passing the combined gaseous mixture to a sulfur recovery process wherein the hydrogen sulfide and sulfur dioxide are recovered as sulfur.The ammonia may be partially oxidized by the use of substoichiometric amounts of oxygen or thermally dissociated.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: May 18, 1999
    Assignee: Black & Veatch Pritchard, Inc.
    Inventors: David K. Stevens, James S. McCormick