Patents by Inventor Deena Ferdous

Deena Ferdous 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: 9649610
    Abstract: A method of preparing a spray dried catalyst by combining spray dried catalyst particles with wax so the spray dried catalyst particles are coated with wax, yielding wax coated catalyst particles, and shaping the wax coated catalyst to provide shaped wax coated catalyst. A method of activating Fischer-Tropsch catalyst particles containing oxides by contacting the catalyst particles with a reducing gas in an activation vessel to produce an activated catalyst, wherein contacting is performed in the absence of a liquid medium under activation conditions. A system for activating a Fischer-Tropsch catalyst containing an activation reactor configured to introduce an activation gas to a fixed or fluidized bed of the Fischer-Tropsch catalyst in the absence of a liquid medium and at least one separation device configured to separate a gas stream comprising entrained catalyst fines having an average particle size below a desired cutoff size from the activation reactor.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: May 16, 2017
    Assignee: RES USA, LLC
    Inventors: Harold A. Wright, Belma Demirel, Sergio Mohedas, Bahman Rejai, Ray J. Huang, Deena Ferdous, Jesse W. Taylor, Dawid J. Duvenhage, Sara L. Rolfe
  • Patent number: 9522372
    Abstract: A method of preparing a spray dried catalyst by combining spray dried catalyst particles with wax so the spray dried catalyst particles are coated with wax, yielding wax coated catalyst particles, and shaping the wax coated catalyst to provide shaped wax coated catalyst. A method of activating Fischer-Tropsch catalyst particles containing oxides by contacting the catalyst particles with a reducing gas in an activation vessel to produce an activated catalyst, wherein contacting is performed in the absence of a liquid medium under activation conditions. A system for activating a Fischer-Tropsch catalyst containing an activation reactor configured to introduce an activation gas to a fixed or fluidized bed of the Fischer-Tropsch catalyst in the absence of a liquid medium and at least one separation device configured to separate a gas stream comprising entrained catalyst fines having an average particle size below a desired cutoff size from the activation reactor.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: December 20, 2016
    Assignee: RES USA, LLC
    Inventors: Harold A. Wright, Belma Demirel, Sergio Mohedas, Bahman Rejai, Ray J. Huang, Deena Ferdous, Jesse W. Taylor, Dawid J. Duvenhage, Sara L. Rolfe
  • Publication number: 20150023842
    Abstract: A method of preparing a spray dried catalyst by combining spray dried catalyst particles with wax so the spray dried catalyst particles are coated with wax, yielding wax coated catalyst particles, and shaping the wax coated catalyst to provide shaped wax coated catalyst. A method of activating Fischer-Tropsch catalyst particles containing oxides by contacting the catalyst particles with a reducing gas in an activation vessel to produce an activated catalyst, wherein contacting is performed in the absence of a liquid medium under activation conditions. A system for activating a Fischer-Tropsch catalyst containing an activation reactor configured to introduce an activation gas to a fixed or fluidized bed of the Fischer-Tropsch catalyst in the absence of a liquid medium and at least one separation device configured to separate a gas stream comprising entrained catalyst fines having an average particle size below a desired cutoff size from the activation reactor.
    Type: Application
    Filed: August 25, 2014
    Publication date: January 22, 2015
    Inventors: Harold A. WRIGHT, Belma Demirel, Sergio Mohedas, Bahman Rejai, Ray J. Huang, Deena Ferdous, Jesse W. Taylor, Dawid J. Duvenhage, Sara L. Rolfe
  • Patent number: 8901027
    Abstract: A method of forming a Fischer-Tropsch catalyst by providing at least one metal nitrate solution, combining each of the at least one metal nitrate solutions with a precipitating agent whereby at least one catalyst precipitate is formed, and incorporating a strong base during precipitation, subsequent precipitation, or both during and subsequent precipitation. Catalysts produced via the disclosed method are also provided.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: December 2, 2014
    Assignee: Res USA, LLC
    Inventors: Deena Ferdous, Belma Demirel
  • Publication number: 20130296448
    Abstract: A method of preparing a spray dried catalyst by combining spray dried catalyst particles with wax so the spray dried catalyst particles are coated with wax, yielding wax coated catalyst particles, and shaping the wax coated catalyst to provide shaped wax coated catalyst. A method of activating Fischer-Tropsch catalyst particles containing oxides by contacting the catalyst particles with a reducing gas in an activation vessel to produce an activated catalyst, wherein contacting is performed in the absence of a liquid medium under activation conditions. A system for activating a Fischer-Tropsch catalyst containing an activation reactor configured to introduce an activation gas to a fixed or fluidized bed of the Fischer-Tropsch catalyst in the absence of a liquid medium and at least one separation device configured to separate a gas stream comprising entrained catalyst fines having an average particle size below a desired cutoff size from the activation reactor.
    Type: Application
    Filed: July 2, 2013
    Publication date: November 7, 2013
    Inventors: Harold A. Wright, Belma Demirel, Sergio Mohedas, Bahman Rejai, Ray J. Huang, Deena Ferdous, Jesse W. Taylor, Dawid J. Duvenhage, Sara L. Rolfe
  • Patent number: 8530366
    Abstract: A method of preparing a spray dried catalyst by combining spray dried catalyst particles with wax so the spray dried catalyst particles are coated with wax, yielding wax coated catalyst particles, and shaping the wax coated catalyst to provide shaped wax coated catalyst. A method of activating Fischer-Tropsch catalyst particles containing oxides by contacting the catalyst particles with a reducing gas in an activation vessel to produce an activated catalyst, wherein contacting is performed in the absence of a liquid medium under activation conditions. A system for activating a Fischer-Tropsch catalyst containing an activation reactor configured to introduce an activation gas to a fixed or fluidized bed of the Fischer-Tropsch catalyst in the absence of a liquid medium and at least one separation device configured to separate a gas stream comprising entrained catalyst fines having an average particle size below a desired cutoff size from the activation reactor.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: September 10, 2013
    Assignee: Rentech, Inc.
    Inventors: Harold A. Wright, Belma Demirel, Sergio Mohedas, Bahman Rejai, Ray Huang, Deena Ferdous, Jesse W. Taylor, Dawid J. Duvenhage, Sara L. Rolfe
  • Publication number: 20130217569
    Abstract: A method of forming a Fischer-Tropsch catalyst by providing at least one metal nitrate solution, combining each of the at least one metal nitrate solutions with a precipitating agent whereby at least one catalyst precipitate is formed, and incorporating a strong base during precipitation, subsequent precipitation, or both during and subsequent precipitation. Catalysts produced via the disclosed method are also provided.
    Type: Application
    Filed: November 15, 2011
    Publication date: August 22, 2013
    Applicant: RENTECH, INC.
    Inventors: Deena Ferdous, Belma Demirel
  • Publication number: 20110313061
    Abstract: A method of preparing a spray dried catalyst by combining spray dried catalyst particles with wax so the spray dried catalyst particles are coated with wax, yielding wax coated catalyst particles, and shaping the wax coated catalyst to provide shaped wax coated catalyst. A method of activating Fischer-Tropsch catalyst particles containing oxides by contacting the catalyst particles with a reducing gas in an activation vessel to produce an activated catalyst, wherein contacting is performed in the absence of a liquid medium under activation conditions. A system for activating a Fischer-Tropsch catalyst containing an activation reactor configured to introduce an activation gas to a fixed or fluidized bed of the Fischer-Tropsch catalyst in the absence of a liquid medium and at least one separation device configured to separate a gas stream comprising entrained catalyst fines having an average particle size below a desired cutoff size from the activation reactor.
    Type: Application
    Filed: January 5, 2011
    Publication date: December 22, 2011
    Applicant: RENTECH, INC.
    Inventors: Harold A. Wright, Belma Demirel, Sergio Mohedas, Bahman Rejai, Ray Huang, Deena Ferdous, Jesse W. Taylor, Dawid J. Duvenhage, Sara L. Rolfe