Patents Assigned to Union Carbide Corporation
  • Boron nitride coatings
    Patent number: 5007962
    Abstract: A boron nitride-containing composition for use as a film-forming coating on substrates comprising particulate boron nitride dispersed in a solution of methyl chloroform and a solvent, with or without clay. The composition is also suitable for use in aerosol cans.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: April 16, 1991
    Assignee: Union Carbide Corporation
    Inventor: Timothy W. Osborne
  • Pyrolytic boron nitride with columnar crystalline morphology
    Patent number: 5004708
    Abstract: A pyrolytic boron nitride with a highly oriented crystalline morphology of twinned boron nitride crystallites is produced by addition of a trace amount of zirconium into the boron nitride.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: April 2, 1991
    Assignee: Union Carbide Corporation
    Inventor: Arthur W. Moore
  • 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
  • Zirconia mullite/boron nitride composites
    Patent number: 4997605
    Abstract: A hot-pressed ceramic composite having good resistance to thermal shock and good erosion/corrosion resistance in molten alloys, and a method for producing said composite which comprises the blending of fused zirconia mullite with boron nitride.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: March 5, 1991
    Assignee: Union Carbide Corporation
    Inventor: Gregory W. Shaffer
  • Reduced No.sub.x combustion method
    Patent number: 4988285
    Abstract: A combustion method enabling reduced NO.sub.x formation wherein fuel and oxidant are separately injected into a combustion zone in a defined velocity relation, combustion gases are aspirated into the oxidant stream prior to intermixture with the fuel, and the fuel is maintained free from contact with oxygen until the intermixture.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: January 29, 1991
    Assignee: Union Carbide Corporation
    Inventor: Mark A. Delano
  • Method for producing powder by gas atomization
    Patent number: 4988464
    Abstract: A method for producing power by atomizing a stream of molten material by contact with a swirling annular gas stream having an angular to axial velocity ratio sufficient to cause some of the gas to flow in the axially opposite direction from that of the gas stream.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: January 29, 1991
    Assignee: Union Carbide Corporation
    Inventor: Michael F. Riley
  • Floating dual direction seal assembly
    Patent number: 4982889
    Abstract: A seal assembly comprising a ring having radial and axial seals thereon positionable between mating parts for sealing flow of fluid from high to low pressure regions between the mating parts.
    Type: Grant
    Filed: August 9, 1989
    Date of Patent: January 8, 1991
    Assignee: Union Carbide Corporation
    Inventor: Edward P. Eardley
  • Process for forming a metal boride coating on a carbonaceous substrate
    Patent number: 4979998
    Abstract: A process to form a uniform metal boride coating on a carbonaceous substrate by first forming a metal carbide coating and reacting the carbide coating with a boron compound.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: December 25, 1990
    Assignee: Union Carbide Corporation
    Inventors: Ching F. Chang, Raymond V. Sara
  • High gas flow rate production
    Patent number: 4977921
    Abstract: High gas flow requirements of large size lines are conveniently provided by a series of high pressure tubes connected to header means adapted to control the storage and distribution of gas to the lines at desired flow rates for relatively short periods of time. Gas thus supplied can conveniently be used as a propelling gas stream for the in-situ cleaning of large size lines under high exit velocity conditions requiring the supply of gas at a high flow rate not conveniently supplied by conventional pumpers.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: December 18, 1990
    Assignee: Union Carbide Corporation
    Inventors: Larry F. Knight, Daniel K. Ogilvie, Ronny W. Worsham
  • Turbomachine with seal fluid recovery channel
    Patent number: 4978278
    Abstract: Turbomachine and method of operation wherein shroud seal fluid is channelled from the turbomachine at or proximate to the seal and preferably recycled back to the turbomachine.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: December 18, 1990
    Assignee: Union Carbide Corporation
    Inventor: Leslie C. Kun
  • Sterilization method
    Patent number: 4976922
    Abstract: A sterilant mixture comprising 15 to 30 mole percent ethylene oxide and 70 to 85 mole percent 1,1-dichloro-2,2,2-trifluoroethane and/or 1-chloro-1,2,2,2-tetrafluoroethane, and a sterilization method using same.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: December 11, 1990
    Assignee: Union Carbide Corporation
    Inventors: Simon Chippett, Stephen A. Conviser
  • Coated article with improved thermal emissivity
    Patent number: 4975621
    Abstract: A coated article suitable for use in a vacuum consisting essentially of a refractory metal substrate and a first coating of TiB.sub.2 and Mo. An overcoat of TiB.sub.2 may be applied to the first coating as a second layer upon which additional layers may be applied if desired.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: December 4, 1990
    Assignee: Union Carbide Corporation
    Inventors: Harold H. Fukubayashi, Jiinjen A. Sue, Robert C. Tucer, Jr., Ronnie J. Doan
  • Glassmelting method with reduced nox generation
    Patent number: 4973346
    Abstract: A glassmelting method wherein glassforming materials are preheated prior to entering the melting vessel by direct contact with combustion products from the melting vessel produced by combustion carried out with pure oxygen or oxygen-enriched air.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: November 27, 1990
    Assignee: Union Carbide Corporation
    Inventor: Hisashi Kobayashi
  • Plasticizer and method of preparing pitch for use in carbon and graphite production
    Patent number: 4971679
    Abstract: A plasticizer for use in the manufacture of pitch which forms a fluid at room temperature consisting essentially of a tar composed of low molecular weight and polymerized aromatic hydrocarbons having a molecular weight distribution characteristic which is bimodel. The plasticizer is formed by reacting a tar or distillate precursor with oxygen under controlled conditions of temperature and time.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: November 20, 1990
    Assignee: Union Carbide Corporation
    Inventors: Irwin C. Lewis, Terrence A. Pirro
  • Multiple oxidant jet combustion method and apparatus
    Patent number: 4969814
    Abstract: Method and apparatus to carry out combustion with more uniform temperature distribution and with reduced NO.sub.x generation comprising oxidant injection through a nozzle having straight and angled orifices with aspiration into the angled oxidant and downstream consolidation of the oxidant streams.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: November 13, 1990
    Assignee: Union Carbide Corporation
    Inventors: Min-Da Ho, Paul J. Liszewski
  • High pressure gas supply system
    Patent number: 4961325
    Abstract: Method and apparatus for supplying gas, especially a cryogenic gas, to a use point at high pressure, especially supercritical pressure, with little or no lag time comprising a gas supply for quickly pressurizing a vaporizable liquid and the vaporization of the pressurized liquid for high pressure gas supply.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: October 9, 1990
    Assignee: Union Carbide Corporation
    Inventors: Thomas G. Halvorson, Herbert R. Schaub
  • Membrane process and system for nitrogen production
    Patent number: 4960579
    Abstract: On-site membrane systems are used for air separation to produce a low purity nitrogen stream and for purifying impure hydrogen, the nitrogen and hydrogen being passed to a catalytic combustion system in which the oxygen content of the nitrogen stream is reacted with said hydrogen to reduce the residual oxygen content of the nitrogen in a final purification operation to produce high purity nitrogen. Pressure swing adsorption systems can be employed in place of the membrane systems for particular applications, and a cryogenic system can be employed for said hydrogen purification.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: October 2, 1990
    Assignee: Union Carbide Corporation
    Inventor: Michael J. Campbell
  • Air separation process with improved reboiler liquid cleaning circuit
    Patent number: 4957524
    Abstract: A cryogenic rectification method wherein liquid from a top condenser-reboiler is cleaned of higher boiling impurities by passage through an adsorbent bed and returned to the condenser-reboiler, wherein the flow back to the condenser-reboiler is driven by combination with density-reducing vapor.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: September 18, 1990
    Assignee: Union Carbide Corporation
    Inventors: Ravindra F. Pahade, John H. Ziemer, John K. Howell
  • Combustion process having improved temperature distribution
    Patent number: 4957050
    Abstract: A method for carrying out combustion in a combustion zone using oxygen or oxygen-enriched air as the oxidant wherein atomized liquid is provided to the combustion zone separate from oxidant and combustible vapors, causing it to be distributed throughout the combustion zone and then, especially after its vaporization, uniformly provided to the combustion reaction with consequent uniform temperature moderation, and resulting in reduced NO.sub.x generation and reduced refractory damage.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: September 18, 1990
    Assignee: Union Carbide Corporation
    Inventor: Min-Da Ho
  • Aircraft de-icing and anti-icing composition
    Patent number: 4954279
    Abstract: A composition is described which consists of a microemulsion of oil in a water/glycol solution containing certain thickening agents, emulsifiers, substantially water-insoluble, partially polar oils, and alkanolamines to provide the desirable viscosity and shear stability needed to give a composition having effective de-icer and anti-icing properties.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: September 4, 1990
    Assignee: Union Carbide Corporation
    Inventors: Frank Ma, Daniel Comeau