Patents by Inventor Kazuo Kiyonaga

Kazuo Kiyonaga 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: 6613949
    Abstract: This invention is directed towards an improved process for the selective gas phase oxidation of a organic reactant using a metal oxide redox catalyst, wherein the organic reactant and air feeds are at a substantially continuous level, the improvement comprising adding a fluctuating flow of oxygen at alternating relatively high and relatively low levels. The invention also teaches means by which a gas may be provided to a reaction process on a fluctuating basis.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: September 2, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Matthew Lincoln Wagner, Donald Walter Welsh Kirkwood, Kazuo Kiyonaga
  • Patent number: 5646305
    Abstract: This invention is directed towards an improved process for the selective gas phase oxidation of a organic reactant using a metal oxide redox catalyst, wherein the organic reactant and air feeds are at a substantially continuous level, the improvement comprising adding a fluctuating flow of oxygen at alternating relatively high and relatively low levels. The invention also teaches means by which a gas may be provided to a reaction process on a fluctuating basis.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: July 8, 1997
    Assignee: Praxair Technology, Inc.
    Inventors: Matthew Lincoln Wagner, Donald Walter Welsh Kirkwood, Kazuo Kiyonaga
  • Patent number: 5356600
    Abstract: In systems in which air is introduced into a liquid as a source of oxygen, additional oxygen added independent of the feed air enhances the oxygen content of the liquid source significantly than if the same amount of additional oxygen were combined with the feed air.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: October 18, 1994
    Assignee: Praxair Technology, Inc.
    Inventors: Kazuo Kiyonaga, Lawrence M. Litz, Thomas J. Bergman
  • Patent number: 4867918
    Abstract: Gas dispersion in a liquid is enhanced by combining the gas and liquid in close proximity to a venturi or other flow constriction means used to create supersonic flow velocities and subsequent deacceleration to sub-sonic velocity. When a venturi is employed, the gas-liquid mixing occurs in the converging portion of the venturi or upstream but in close proximity to said venturi. Turbulent flow conditions upstream of the venturi or other flow constriction means adequate to disperse the gas uniformly in the liquid are not required and, surprisingly, the gas and liquid need not be uniformly dispersed prior to acceleration to supersonic velocity.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: September 19, 1989
    Assignee: Union Carbide Corporation
    Inventors: Kazuo Kiyonaga, Lawrence M. Litz, Thomas J. Bergman
  • Patent number: 4278462
    Abstract: In a process for hardening oxidizable green iron ore pellets in a vertical shaft furnace, said process comprising passing the pellets through the furnace wherein said pellets are heated by contact with hot combustion gases and air, the furnace having a zone which is downstream of the introduction of the combustion gases, said zone having an average temperature in the range of about 1100.degree. F. to about 2200.degree. F.
    Type: Grant
    Filed: August 6, 1976
    Date of Patent: July 14, 1981
    Assignee: Union Carbide Corporation
    Inventor: Kazuo Kiyonaga
  • Patent number: 4185984
    Abstract: In a process for producing molten glass in a generally cylindrical continuously rotating chamber comprising the following steps:(a) feeding inorganic raw materials, including silica in major proportion, into the chamber;(b) providing a flame of high intensity heat produced by the combustion of fuel with a gas containing about 50 to about 100 percent by volume oxygen and directing the flame into the chamber in such a manner that the raw materials are melted; and(c) rotating said chamber at a sufficient speed and cooling the exterior of the chamber with a liquid coolant in such a manner that the inner surface of the chamber is coated with a layer of molten glass, the layer is solidified, and a solidified layer of glass is maintained throughout the process whereby the solidified layer essentially prevents impurities from the inner surface of the chamber from entering the melt; and(d) withdrawing molten glass,the improvement comprising heating the silica prior to step (a) to a temperature in the range of about 50
    Type: Grant
    Filed: June 21, 1978
    Date of Patent: January 29, 1980
    Assignee: Union Carbide Corporation
    Inventor: Kazuo Kiyonaga
  • Patent number: 4061487
    Abstract: A continuous process for melting inorganic raw materials to produce molten glass in a generally cylindrical continuously rotating chamber comprising the following steps:A. feeding the raw materials into the chamber;B. providing a flame of high intensity heat produced by the combustion of fuel with a gas containing about 50 to about 100 percent by volume oxygen and directing the flame into the chamber in such a manner that the raw materials are melted; andC. rotating said chamber at a sufficient speed and cooling the exterior of the chamber with a liquid coolant in such a manner that the inner surface of the chamber is coated with a layer of molten glass, the layer is solidified, and a solidified layer of glass is maintained throughout the process; andD. withdrawing molten glass.
    Type: Grant
    Filed: December 16, 1976
    Date of Patent: December 6, 1977
    Assignee: Union Carbide Corporation
    Inventor: Kazuo Kiyonaga