Patents by Inventor Ramchandra M. Watwe

Ramchandra M. Watwe 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: 7985399
    Abstract: A hydrogen production method and facility in which a synthesis gas stream produced by the gasification of a carbonaceous substance is processed within a synthesis gas processing unit in which the carbon monoxide content is reacted with steam to produce additional hydrogen that is removed by a pressure swing adsorption unit. The tail gas from the pressure swing adsorption unit is further reformed with the addition of a hydrocarbon containing stream in a steam methane reforming system, further shifted to produce further additional hydrogen. The further hydrogen is then separated in another pressure swing adsorption unit.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: July 26, 2011
    Assignee: Praxair Technology, Inc.
    Inventors: Raymond F. Drnevich, Ramchandra M. Watwe
  • Patent number: 7931888
    Abstract: A method of producing a hydrogen product stream in which a steam stream is reacted with a hydrocarbon containing stream within a steam methane reformer. The resulting product stream is subjected to a water gas shift reaction and then to pressure swing adsorption to produce the hydrogen product stream. The hydrocarbon stream is alternatively formed from a first type of feed stream made up of natural gas, refinery off-gas, naphtha or synthetic natural gas or combinations thereof and a second type that is additionally made up of a hydrogen and carbon monoxide containing gas. During use of both of the types of feed streams, the flow rate of the steam stream is not substantially changed and reformer exit temperatures of both the reactant and the flue gas side are held essentially constant.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: April 26, 2011
    Assignee: Praxair Technology, Inc.
    Inventors: Raymond Francis Drnevich, Ramchandra M. Watwe
  • Publication number: 20100074839
    Abstract: A method of producing a hydrogen product stream in which a steam stream is reacted with a hydrocarbon containing stream within a steam methane reformer. The resulting product stream is subjected to a water gas shift reaction and then to pressure swing adsorption to produce the hydrogen product stream. The hydrocarbon stream is alternatively formed from a first type of feed stream made up of natural gas, refinery off-gas, naphtha or synthetic natural gas or combinations thereof and a second type that is additionally made up of a hydrogen and carbon monoxide containing gas. During use of both of the types of feed streams, the flow rate of the steam stream is not substantially changed and reformer exit temperatures of both the reactant and the flue gas side are held essentially constant.
    Type: Application
    Filed: September 22, 2008
    Publication date: March 25, 2010
    Inventors: Raymond Francis Drnevich, Ramchandra M. Watwe
  • Publication number: 20090246118
    Abstract: A hydrogen production method and facility in which a synthesis gas stream produced by the gasification of a carbonaceous substance is processed within a synthesis gas processing unit in which the carbon monoxide content is reacted with steam to produce additional hydrogen that is removed by a pressure swing adsorption unit. The tail gas from the pressure swing adsorption unit is further reformed with the addition of a hydrocarbon containing stream in a steam methane reforming system, further shifted to produce further additional hydrogen. The further hydrogen is then separated in another pressure swing adsorption unit.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 1, 2009
    Applicant: PRAXAIR TECHNOLOGY, INC.
    Inventors: Raymond F. Drnevich, Ramchandra M. Watwe