Patents by Inventor Oscar W. Haas

Oscar W. Haas 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).

  • Membrane nitrogen process and system
    Patent number: 5122355
    Abstract: Feed air is separated in a membrane system, with recovered nitrogen being purified in a deoxo unit and dried in an adsorbent dryer using high temperature purge gas. The heat generated in the deoxo unit can be used to satisfy the thermal energy requirements of dryer regeneration, without decrease in product recovery. Membrane permeate gas can be used for purge at high purge/feed ratio to reduce the energy requirements of bed regeneration.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: June 16, 1992
    Assignee: Union Carbide Industrial Gases Technology Corporation
    Inventors: Ravi Prasad, Oscar W. Haas, Frank Notaro, David R. Thompson
  • Hybrid prepurifier for cryogenic air separation plants
    Patent number: 5116396
    Abstract: Feed air to a prepurifier adsorption system/cryogenic air separation system for dry, high purity nitrogen and/or oxygen production is dried in a membrance dryer preferably characterized by a countercurrent flow path. Drying is enhanced by the use of purge gas on the permeate side of the membrane dryer, with adsorption system or cryogenic air separation system product or waste gas, dried feed air or ambient air being used as purge gas. Two membrane materials are employed in the membrane dryer, in a single stage or in two stages, for enhanced removal of water and carbon dioxide from the feed air.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: May 26, 1992
    Assignee: Union Carbide Industrial Gases Technology Corporation
    Inventors: Ravi Prasad, Frank Notaro, Oscar W. Haas
  • Production of dry, high purity nitrogen
    Patent number: 5004482
    Abstract: Wet feed air to, or high purity nitrogen from, a pressure swing adsorption system is dried in a dryer membrane system preferably operated with a countercurrent flow path. Drying is enhanced by the use of a purge gas on the permeate side of the membrane, with waste gas from the pressure swing adsorption system or a portion of the dry, high purity nitrogen product gas being used as purge gas.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: April 2, 1991
    Assignee: Union Carbide Corporation
    Inventors: Oscar W. Haas, Ravi Prasad, James Smolarek
  • Dry, high purity nitrogen production process and system
    Patent number: 4934148
    Abstract: Feed air to a prepurifier adsorption system/cryogenic air separation system for dry, high purity nitrogen and/or oxygen production is dried in a membrane dryer preferably characterized by a countercurrent flow path. Drying is enhanced by the use of purge gas on the permeate side of the membrane dryer, which adsorption system or cryogenic air separation system product or waste gas, dried feed air or ambient air being used as purge gas.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: June 19, 1990
    Assignee: Union Carbide Corporation
    Inventors: Ravi Prasad, Oscar W. Haas, Harry Cheung
  • Prevention of membrane degradation
    Patent number: 4881953
    Abstract: In the separation of gases in a membrane system, degradation of membrane permeability is prevented by passing the feed gas mixture through a bed of adsorbent material, preferably activated carbon, to adsorb the heavier hydrocarbon contaminants responsible for degradation without removal of lighter hydrocarbons.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: November 21, 1989
    Assignee: Union Carbide Corporation
    Inventors: Ravi Prasad, Oscar W. Haas