Patents by Inventor Kandaswamy Jothimurugesan

Kandaswamy Jothimurugesan 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).

  • Publication number: 20140336286
    Abstract: Disclosed are hybrid synthesis gas conversion catalysts containing at least one Fischer-Tropsch component and at least one acidic component deposited on a monolith catalyst support for use in synthesis gas conversion processes and methods for preparing the catalysts. Also disclosed are synthesis gas conversion processes in which the hybrid synthesis gas conversion catalysts are contacted with synthesis gas to produce a hydrocarbon product containing at least 50 wt % C5+ hydrocarbons. Also disclosed are synthesis gas conversion processes in which at least one layer of Fischer-Tropsch component deposited onto a monolith support is alternated with at least one layer of acidic component in a fixed bed reactor.
    Type: Application
    Filed: July 24, 2014
    Publication date: November 13, 2014
    Applicant: Chevron U.S.A. Inc.
    Inventors: Charles Leonard Kibby, Robert James Saxton, JR., Kandaswamy Jothimurugesan, Tapan Kumar Das, Howard Steven Lacheen, Michael Bartz, Alfred Hass
  • Patent number: 8802741
    Abstract: Disclosed are hybrid Fischer-Tropsch catalysts containing cobalt and ZSM-48 zeolite. The hybrid Fischer-Tropsch catalysts can contain cobalt deposited on ZSM-48 extrudate supports. Alternatively, the Fischer-Tropsch catalysts can contain cobalt deposited on supports mixed with ZSM-48 particles. It has surprisingly been found that the use of hybrid Fischer-Tropsch catalysts containing ZSM-48 zeolite in synthesis gas conversion reactions results in improved C5+ productivity and catalyst activity, as well as a desirable product distribution including low formation of methane and C21+.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: August 12, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventors: Kandaswamy Jothimurugesan, Robert James Saxton
  • Publication number: 20140213670
    Abstract: Disclosed are hybrid Fischer-Tropsch catalysts containing cobalt and ZSM-48 zeolite. The hybrid Fischer-Tropsch catalysts can contain cobalt deposited on ZSM-48 extrudate supports. Alternatively, the Fischer-Tropsch catalysts can contain cobalt deposited on supports mixed with ZSM-48 particles. It has surprisingly been found that the use of hybrid Fischer-Tropsch catalysts containing ZSM-48 zeolite in synthesis gas conversion reactions results in improved C5+ productivity and catalyst activity, as well as a desirable product distribution including low formation of methane and C21+.
    Type: Application
    Filed: January 25, 2013
    Publication date: July 31, 2014
    Applicant: Chevron U.S.A. Inc.
    Inventors: Kandaswamy Jothimurugesan, Robert James Saxton
  • Patent number: 8753500
    Abstract: A process and system are described for the processing of gas associated with crude oil production, i.e. associated gas. A separation complex is used to separate produced fluids produced from a hydrocarbon reservoir into crude oil, liquefied petroleum gas, water, and natural gas. At least a portion of the natural gas is converted into synthesis gas in a synthesis gas generator. A combination of a synthesis gas conversion catalysts and hydroconversion catalysts are used in a synthesis gas reactor to convert the synthesis gas into a liquid effluent stream containing liquefied petroleum gas and a synthetic crude oil. The liquefied petroleum gas and synthetic crude oil from the synthesis gas reactor is sent to the separation complex. Liquefied petroleum gas is separated both from the synthetic crude oil and a natural crude oil obtained from the produced fluids.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: June 17, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventors: Charles Leonard Kibby, Dennis J. O'Rear, Robert James Saxton, Tapan K. Das, Kandaswamy Jothimurugesan
  • Publication number: 20140031194
    Abstract: Methods for preparing integral synthesis gas conversion catalyst extrudates including an oxide of a Fischer-Tropsch (FT) metal component and a zeolite component are disclosed. The oxide of the FT metal component is precipitated from a solution into crystallites having a particle size between about 2 nm and about 30 nm. The oxide of the FT metal component is combined with a zeolite powder and a binder material, and the combination is extruded to form integral catalyst extrudates. The oxide of the FT metal component in the resulting catalyst is in the form of reduced crystallites located outside the zeolite channels. No appreciable ion exchange of FT metal occurs within the zeolite channels. The acid site density of the integral catalyst extrudate is at least about 80% of the zeolite acid site density.
    Type: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: Chevron U.S.A. Inc.
    Inventors: Kandaswamy Jothimurugesan, Robert James Saxton, Howard Steven Lacheen, Tapan Kumar Das
  • Publication number: 20130253078
    Abstract: Disclosed are hybrid Fischer-Tropsch catalysts containing cobalt deposited on hybrid supports. The hybrid supports contain an acidic zeolite component and a silica-containing material. It has been found that the use of the hybrid Fischer-Tropsch catalysts in synthesis gas conversion reactions results in high C5+ productivity, high CO conversion rates and low olefin formation.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 26, 2013
    Applicant: Chevron U.S.A. Inc.
    Inventors: Kandaswamy Jothimurugesan, Robert James Saxton
  • Publication number: 20130253079
    Abstract: Disclosed are hybrid Fischer-Tropsch catalysts containing cobalt deposited on hybrid supports. The hybrid supports contain an acidic zeolite component and a silica-containing material. It has been found that the use of the hybrid Fischer-Tropsch catalysts in synthesis gas conversion reactions results in high C5+ productivity, high CO conversion rates and low olefin formation.
    Type: Application
    Filed: September 5, 2012
    Publication date: September 26, 2013
    Applicant: CHEVRON U.S.A . INC.
    Inventors: Kandaswamy Jothimurugesan, Robert James Saxton
  • Patent number: 8519011
    Abstract: Disclosed is a process for converting synthesis gas to liquid hydrocarbon mixtures useful in the production of fuels and petrochemicals. The synthesis gas is contacted with at least two layers of synthesis gas conversion catalyst wherein each synthesis gas conversion catalyst layer is followed by a layer of hydrocracking catalyst and hydroisomerization catalyst or separate layers of hydrocracking and hydroisomerization catalysts. The process can occur within a single reactor, at an essentially common reactor temperature and an essentially common reactor pressure. The process provides a high yield of naphtha range liquid hydrocarbons and a low yield of wax.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: August 27, 2013
    Assignee: Chevron U.S.A. Inc.
    Inventors: Robert J. Saxton, Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan Das
  • Publication number: 20130210942
    Abstract: Disclosed are hybrid synthesis gas conversion catalysts containing at least one Fischer-Tropsch component and at least one acidic component deposited on a monolith catalyst support for use in synthesis gas conversion processes and methods for preparing the catalysts. Also disclosed are synthesis gas conversion processes in which the hybrid synthesis gas conversion catalysts are contacted with synthesis gas to produce a hydrocarbon product containing at least 50 wt % C5+ hydrocarbons. Also disclosed are synthesis gas conversion processes in which at least one layer of Fischer-Tropsch component deposited onto a monolith support is alternated with at least one layer of acidic component in a fixed bed reactor.
    Type: Application
    Filed: February 14, 2012
    Publication date: August 15, 2013
    Applicant: Chevron U.S.A Inc.
    Inventors: Charles Leonard Kibby, Robert James Saxton, JR., Kandaswamy Jothimurugesan, Tapan Kumar Das, Howard Steven Lacheen, Michael Bartz, Alfred Has
  • Patent number: 8481601
    Abstract: The disclosure relates to a method of performing a synthesis gas conversion reaction in which synthesis gas contacts a catalyst system including a mixture of ruthenium loaded Fischer-Tropsch catalyst particles and at least one set of catalyst particles including an acidic component promoted with a noble metal, e.g., Pt or Pd. The reaction occurs at conditions resulting in a hydrocarbons product containing 1-15 weight % CH4, 1-15 weight % C2-C4, 70-95 weight % C5+, 0-5 weight % C21+ normal paraffins, and 0-10 weight % aromatic hydrocarbons.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: July 9, 2013
    Assignee: Chevron U.S.A. Inc.
    Inventors: Tapan Das, Kandaswamy Jothimurugesan, Charles L Kibby, Robert J. Saxton
  • Publication number: 20130158138
    Abstract: Methods for preparing integral synthesis gas conversion catalyst extrudates including an oxide of a Fischer-Tropsch (FT) metal component and a zeolite component are disclosed. The oxide of the FT metal component is precipitated from a solution into crystallites having a particle size between about 2 nm and about 30 nm. The oxide of the FT metal component is combined with a zeolite powder and a binder material, and the combination is extruded to form integral catalyst extrudates. The oxide of the FT metal component in the resulting catalyst is in the form of reduced crystallites located outside the zeolite channels. No appreciable ion exchange of FT metal occurs within the zeolite channels. The acid site density of the integral catalyst extrudate is at least about 80% of the zeolite acid site density.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 20, 2013
    Applicant: CHEVRON U.S.A. Inc.
    Inventors: Kandaswamy Jothimurugesan, Robert J. Saxton, Howard S. Lacheen, Tapan Das
  • Patent number: 8461220
    Abstract: A method is provided for converting synthesis gas to liquid hydrocarbon mixtures useful as distillate fuel and/or lube base oil containing no greater than about 25 wt % olefins and containing no greater than about 5 wt % C21+ normal paraffins. The synthesis gas is contacted with a synthesis gas conversion catalyst comprising a Fischer-Tropsch synthesis component and an acidic component in an upstream catalyst bed thereby producing a wax-free liquid containing a paraffin component and an olefin component. The olefin component is saturated by contacting the liquid with an olefin saturation catalyst in a downstream catalyst bed.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: June 11, 2013
    Assignee: Chevron U.S.A. Inc.
    Inventors: Charles L. Kibby, Robert J. Saxton, Kandaswamy Jothimurugesan, Tapan K. Das
  • Patent number: 8445550
    Abstract: Disclosed is a method of forming a hybrid Fischer-Tropsch catalyst extrudate for use in synthesis gas conversion reactions. The method includes extruding a mixture of ruthenium loaded metal oxide support particles, particles of an acidic component and a binder sol to form an extrudate. The resulting extrudate contains from about 0.1 to about 15 weight percent ruthenium based on the weight of the extrudate. In a synthesis gas conversion reaction, the extrudate is contacted with a synthesis gas having a H2 to CO molar ratio of 0.5 to 3.0 at a reaction temperature of 160° C. to 300° C., a total pressure of 3 to 35 atmospheres, and an hourly space velocity of 5 to 10,000 v/v/hour, resulting in hydrocarbon products containing 1-15 weight % CH4; 1-15 weight % C2-C4; 70-95 weight % C5+; 0-5 weight % C21+ normal paraffins; and 0-10 weight % aromatic hydrocarbons.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: May 21, 2013
    Assignee: Chevron U.S.A. Inc.
    Inventors: Kandaswamy Jothimurugesan, Tapan Das, Charles L. Kibby, Robert J. Saxton
  • Publication number: 20130109768
    Abstract: Processes and systems are provided for converting synthesis gas containing a mixture of H2 and CO to liquid hydrocarbon products having a cloud point less than about 15° C. The systems utilize at least one Fischer-Tropsch reactor containing hybrid Fischer-Tropsch catalyst with cooling and separation of reactor effluent following each reactor. The low cloud point indicates that the amount of wax in the hydrocarbon products is minimized relative to conventional Fischer-Tropsch conversion. Accordingly, more economical systems can be built and operated because equipment associated with wax removal or wax treatment can be reduced or eliminated.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 2, 2013
    Applicant: Chevron U.S.A. Inc.
    Inventors: Robert J. Saxton, Gordon R. Deppe, Scott Oliver, David W. Parham, Kandaswamy Jothimurugesan, Charles L. Kibby, Tapan K. Das, Christine M. Philips, Richard Sasson, Anne Helgeson
  • Patent number: 8377996
    Abstract: A method for forming a catalyst for synthesis gas conversion comprises impregnating a zeolite extrudate using a solution, for example, a substantially non-aqueous solution, comprising a cobalt salt to provide an impregnated zeolite extrudate and activating the impregnated zeolite extrudate by a reduction-oxidation-reduction cycle.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: February 19, 2013
    Assignee: Chevron U.S.A. Inc.
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan
  • Publication number: 20130001128
    Abstract: A method is provided for converting synthesis gas to liquid hydrocarbon mixtures useful as distillate fuel and/or lube base oil. The synthesis gas is contacted with a synthesis gas conversion catalyst comprising a Fischer-Tropsch synthesis component in an upstream catalyst bed thereby producing an intermediate hydrocarbon mixture containing olefins and C21+ normal paraffins. The intermediate hydrocarbon mixture is subsequently contacted with a hydroisomerization catalyst and an olefin saturation catalyst, thereby resulting in a product containing no greater than about 25 wt % olefins and containing no greater than about 5 wt % C21+ normal paraffins. The hydroisomerization and olefin saturation catalysts may be in separate beds or mixed in a single bed downstream of the synthesis gas conversion catalyst.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 3, 2013
    Applicant: Chevron U.S.A.
    Inventors: Charles L. Kibby, Robert J. Saxton, Kandaswamy Jothimurugesan, Tapan K. Das
  • Publication number: 20120129960
    Abstract: The disclosure relates to a method of performing a synthesis gas conversion reaction in which synthesis gas contacts a catalyst system including a mixture of ruthenium loaded Fischer-Tropsch catalyst particles and at least one set of catalyst particles including an acidic component promoted with a noble metal, e.g., Pt or Pd. The reaction occurs at conditions resulting in a hydrocarbons product containing 1-15 weight % CH4, 1-15 weight % C2-C4, 70-95 weight % C5+, 0-5 weight % C21+ normal paraffins, and 0-10 weight % aromatic hydrocarbons.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 24, 2012
    Inventors: Tapan Das, Kandaswamy Jothimurugesan, Charles L. Kibby, Robert J. Saxton
  • Publication number: 20120129959
    Abstract: Disclosed is a method of forming a hybrid Fischer-Tropsch catalyst extrudate for use in synthesis gas conversion reactions. The method includes extruding a mixture of ruthenium loaded metal oxide support particles, particles of an acidic component and a binder sol to form an extrudate. The resulting extrudate contains from about 0.1 to about 15 weight percent ruthenium based on the weight of the extrudate. In a synthesis gas conversion reaction, the extrudate is contacted with a synthesis gas having a H2 to CO molar ratio of 0.5 to 3.0 at a reaction temperature of 160° C. to 300° C., a total pressure of 3 to 35 atmospheres, and an hourly space velocity of 5 to 10,000 v/v/hour, resulting in hydrocarbon products containing 1-15 weight % CH4; 1-15 weight % C2-C4; 70-95 weight % C5+; 0-5 weight % C21+ normal paraffins; and 0-10 weight % aromatic hydrocarbons.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 24, 2012
    Inventors: Kandaswamy Jothimurugesan, Tapan Das, Charles L. Kibby, Robert J. Saxton
  • Publication number: 20120108682
    Abstract: Disclosed is a process for converting synthesis gas to liquid hydrocarbon mixtures useful in the production of fuels and petrochemicals. The synthesis gas is contacted with at least two layers of synthesis gas conversion catalyst wherein each synthesis gas conversion catalyst layer is followed by a layer of hydrocracking catalyst and hydroisomerization catalyst or separate layers of hydrocracking and hydroisomerization catalysts. The process can occur within a single reactor, at an essentially common reactor temperature and an essentially common reactor pressure. The process provides a high yield of naphtha range liquid hydrocarbons and a low yield of wax.
    Type: Application
    Filed: August 11, 2011
    Publication date: May 3, 2012
    Applicant: Chevron U.S.A. Inc.
    Inventors: Robert J. Saxton, Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan Das
  • Publication number: 20110306686
    Abstract: A method for forming a catalyst for synthesis gas conversion and a synthesis gas conversion process impregnating a zeolite support wherein the catalyst contains ruthenium on a zeolite support, such as ZSM-5, ZSM-12, SSZ-32 or beta zeolite, and the product stream has less than 1 weight % C21+.
    Type: Application
    Filed: June 9, 2010
    Publication date: December 15, 2011
    Inventors: Kandaswamy Jothimurugesan, Charles Leonard Kibby, Robert James Saxton