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: 20110306685
    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: Application
    Filed: June 10, 2010
    Publication date: December 15, 2011
    Inventors: Charles L. Kibby, Robert J. Saxton, Kandaswamy Jothimurugesan, Tapan K. Das
  • Publication number: 20110240288
    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: Application
    Filed: December 21, 2010
    Publication date: October 6, 2011
    Inventors: Charles Leonard Kibby, Dennis J. O'Rear, Robert James Saxton, Tapan K. Das, Kandaswamy Jothimurugesan
  • Patent number: 7973087
    Abstract: A process is disclosed for converting a feed comprising synthesis gas to liquid hydrocarbons within a single reactor at essentially common reaction conditions. The synthesis gas contacts a catalyst bed comprising a mixture of a synthesis gas conversion catalyst on a support containing an acidic component and a dual functionality catalyst including a hydrogenation component and a solid acid component. The hydrocarbons produced are liquid at about 0° C., contain at least 25% by volume C10+ and are substantially free of solid wax.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: July 5, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan K. Das, Robert J. Saxton, Allen W. Burton, Jr.
  • Patent number: 7973086
    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 and at least two layers of acidic hydrocracking catalyst in an alternating layer arrangement within a single reactor tube wherein each synthesis gas conversion catalyst layer is followed by a layer of hydrocracking catalyst. The process is conducted 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 C21+ normal paraffins.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: July 5, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Robert J. Saxton, Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan Das
  • Publication number: 20110160315
    Abstract: A process is disclosed for converting synthesis gas to a liquid hydrocarbon mixture useful as distillate fuel and/or lube base oil which is substantially free of solid wax. A synthesis gas feed is contacted with a synthesis gas conversion catalyst in an upstream bed and a hydroisomerization catalyst containing a metal promoter and an acidic component in a downstream bed within a single reactor at essentially common reaction conditions. A Fischer-Tropsch wax is formed over the synthesis gas conversion catalyst and said wax is subsequently hydroisomerized over the hydroisomerization catalyst, thereby resulting in a liquid hydrocarbon mixture having a desirable product distribution.
    Type: Application
    Filed: May 14, 2010
    Publication date: June 30, 2011
    Inventors: Charles L. Kibby, Robert J. Saxton, Kandaswamy Jothimurugesan, Tapan K. Das
  • Publication number: 20110144219
    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: Application
    Filed: February 21, 2011
    Publication date: June 16, 2011
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan
  • Publication number: 20110124750
    Abstract: A method for performing synthesis gas conversion is disclosed which comprises contacting synthesis gas with a hybrid Fischer-Tropsch catalyst formed by impregnating a ZSM-12 zeolite extrudate using a solution, for example, a substantially non-aqueous solution, comprising a cobalt salt and activating the impregnated zeolite extrudate by a reduction-oxidation-reduction cycle. The method results in reduced methane yield and increased yield of liquid hydrocarbons substantially free of solid wax.
    Type: Application
    Filed: November 20, 2009
    Publication date: May 26, 2011
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan K. Das, Robert J. Saxton, Allen W. Burton, JR.
  • Publication number: 20110118368
    Abstract: A process is disclosed for converting a feed comprising synthesis gas to liquid hydrocarbons within a single reactor at essentially common reaction conditions. The synthesis gas contacts a catalyst bed comprising a mixture of a synthesis gas conversion catalyst on a support containing an acidic component and a dual functionality catalyst including a hydrogenation component and a solid acid component. The hydrocarbons produced are liquid at about 0° C., contain at least 25% by volume C10+ and are substantially free of solid wax.
    Type: Application
    Filed: October 12, 2010
    Publication date: May 19, 2011
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan K. Das, Robert J. Saxton, Allen W. Burton
  • Patent number: 7943674
    Abstract: A method for performing synthesis gas conversion is disclosed which comprises contacting synthesis gas with a hybrid Fischer-Tropsch catalyst formed by impregnating a ZSM-12 zeolite extrudate using a solution, for example, a substantially non-aqueous solution, comprising a cobalt salt and activating the impregnated zeolite extrudate by a reduction-oxidation-reduction cycle. The method results in reduced methane yield and increased yield of liquid hydrocarbons substantially free of solid wax.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: May 17, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan K. Das, Robert J. Saxton, Allen W. Burton, Jr.
  • Publication number: 20100312030
    Abstract: A process is disclosed for converting a feed comprising synthesis gas to liquid hydrocarbons within a single reactor at essentially common reaction conditions. The synthesis gas contacts a first catalyst bed comprising a synthesis gas conversion catalyst, and a second catalyst bed comprising a mixture of a hydrogenation catalyst and a solid acid catalyst. A Fischer-Tropsch wax is formed over the first catalyst bed and the wax is then hydrocracked and hydroisomerized over the second catalyst bed, resulting in liquid hydrocarbons substantially free of solid wax.
    Type: Application
    Filed: June 4, 2009
    Publication date: December 9, 2010
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan K. Das
  • Patent number: 7825164
    Abstract: A process is disclosed for converting a feed comprising synthesis gas to liquid hydrocarbons within a single reactor at essentially common reaction conditions. The synthesis gas contacts a catalyst bed comprising a mixture of a synthesis gas conversion catalyst on a support containing an acidic component and a dual functionality catalyst including a hydrogenation component and a solid acid component. The hydrocarbons produced are liquid at about 0° C., contain at least 25% by volume C10+ and are substantially free of solid wax.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: November 2, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan K. Das, Robert J. Saxton, Allen W. Burton
  • Publication number: 20100160464
    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: Application
    Filed: December 24, 2008
    Publication date: June 24, 2010
    Applicant: CHEVRON U.S.A. INC.
    Inventors: Charles L. Kibby, Kandaswamy Jothimurugesan, Tapan K. Das
  • Patent number: 7541310
    Abstract: This invention relates to catalysts comprising a catalytic metal deposited on a composite support with well-dispersed chemical “anchor” species acting as nucleation centers for catalytic metal crystallites growth. The catalysts have the advantage that the average catalytic metal crystallite size can be controlled by the molar ratio of catalytic metal to chemical “anchor,” and is not limited by the porous structure of the support. A preferred embodiment comprises a cobalt-based catalyst on a silica-alumina support made by a co-gel method, wherein its average pore size can be controlled by the pH. The alumina species in the support most likely serve as chemical “anchors” to control the dispersion of cobalt species, such that the average cobalt crystallite size can be greater than the average pore size.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: June 2, 2009
    Assignee: ConocoPhillips Company
    Inventors: Rafael L. Espinoza, Kandaswamy Jothimurugesan, Kevin L. Coy, James Dale Ortego, Jr., Nithya Srinivasan, Olga P. Ionkina
  • Patent number: 7449496
    Abstract: A stabilized catalyst support having improved hydrothermal stability, catalyst made therefrom, and method for producing hydrocarbons from synthesis gas using said catalyst. The stabilized support is made by a method comprising treating a crystalline hydrous alumina precursor in contact with at least one structural stabilizer or compound thereof. The crystalline hydrous alumina precursor preferably includes an average crystallite size selected from an optimum range delimited by desired hydrothermal resistance and desired porosity. The crystalline hydrous alumina precursor preferably includes an alumina hydroxide, such as crystalline boehmite, crystalline bayerite, or a plurality thereof differing in average crystallite sizes by at least about 1 nm. The crystalline hydrous alumina precursor may be shaped before or after contact with the structural stabilizer or compound thereof. The treating includes calcining at 450° C. or more.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: November 11, 2008
    Assignee: ConocoPhillips Company
    Inventors: Yaming Jin, Kandaswamy Jothimurugesan, Kristi A. Fjare, J. Dale Ortego, Jr., Beatrice C. Ortego, Rafael L. Espinoza
  • Patent number: 7341976
    Abstract: A stabilized catalyst support having improved hydrothermal stability, catalyst made therefrom, and method for producing hydrocarbons from synthesis gas using said catalyst. The stabilized support is made by a method comprising treating a crystalline hydrous alumina precursor in contact with at least one structural stabilizer or compound thereof. The crystalline hydrous alumina precursor preferably includes an average crystallite size selected from an optimum range delimited by desired hydrothermal resistance and desired porosity. The crystalline hydrous alumina precursor preferably includes an alumina hydroxide, such as crystalline boehmite, crystalline bayerite, or a plurality thereof differing in average crystallite sizes by at least about 1 nm. The crystalline hydrous alumina precursor may be shaped before or after contact with the structural stabilizer or compound thereof. The treating includes calcining at 450° C. or more.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: March 11, 2008
    Assignee: ConocoPhillips Company
    Inventors: Rafael L. Espinoza, Kandaswamy Jothimurugesan, Yaming Jin, J. Dale Ortego, Jr., Kristi A. Fjare, Beatrice C. Ortego
  • Publication number: 20080039539
    Abstract: A stabilized catalyst support having improved hydrothermal stability, catalyst made therefrom, and method for producing hydrocarbons from synthesis gas using said catalyst. The stabilized support is made by a method comprising treating a crystalline hydrous alumina precursor in contact with at least one structural stabilizer or compound thereof. The crystalline hydrous alumina precursor preferably includes an average crystallite size selected from an optimum range delimited by desired hydrothermal resistance and desired porosity. The crystalline hydrous alumina precursor preferably includes an alumina hydroxide, such as crystalline boehmite, crystalline bayerite, or a plurality thereof differing in average crystallite sizes by at least about 1 nm. The crystalline hydrous alumina precursor may be shaped before or after contact with the structural stabilizer or compound thereof. The treating includes calcining at 450° C. or more.
    Type: Application
    Filed: October 19, 2007
    Publication date: February 14, 2008
    Applicant: CONOCOPHILLIPS COMPANY
    Inventors: Rafael Espinoza, Kandaswamy Jothimurugesan, Yaming Jin, J. Ortego, Kristi Fjare, Beatrice Ortego
  • Patent number: 7323100
    Abstract: An amorphous support, methods for making the same and methods of using, particularly in hydrocracking. A method of making may comprise mixing a first amorphous material and a second amorphous material of different acidities to form a mixture, and treating by either separately treating the first and second amorphous materials before mixing or treating the mixture, so as to form an amorphous catalyst support. Treating preferably includes calcining. The acidity of the amorphous support may be modified by the different acidities of the precursor amorphous materials, their proportions in the mixture, and/or the order of the mixing and treating steps. A method of use may comprise reacting a hydrocarbon fraction with hydrogen over a hydrocracking catalyst comprising the amorphous catalyst support to form a hydrocracked product. Further embodiments include the first and second amorphous materials comprising silica-alumina, and/or differing in Brönsted acidity, Lewis acidity, or acidity index.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: January 29, 2008
    Assignee: ConocoPhillips Company
    Inventors: Rafael L. Espinoza, Keith H. Lawson, Kandaswamy Jothimurugesan
  • Patent number: 7259286
    Abstract: An attrition resistant precipitated bulk iron catalyst is prepared from iron oxide precursor and a binder by spray drying. The catalysts are preferably used in carbon monoxide hydrogenation processes such as Fischer-Tropsch synthesis. These catalysts are suitable for use in fluidized-bed reactors, transport reactors and, especially, slurry bubble column reactors.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: August 21, 2007
    Assignees: Research Triangle Institute, The University of Pittsburgh-of the Commonwealth System of Higher Education
    Inventors: Kandaswamy Jothimurugesan, James G. Goodwin, Jr., Santosh K. Gangwal
  • Patent number: 7230035
    Abstract: The present invention relates to improved catalyst compositions, as well as methods of making and using such compositions to prepare synthesis gas and ultimately C5+ hydrocarbons. In particular, preferred embodiments of the present invention comprise catalyst systems comprising a core and an outer region disposed on said core, wherein a substantial amount of the catalytic metal is located in the outer region of the catalyst support matrix. In addition, the catalyst systems are able to maintain high conversion and selectivity values with very low catalytically active metal loadings. The catalyst systems are appropriate for improved syngas, oxidative dehydrogenation and other partial oxidation reactions, including improved reaction schemes for the conversion of hydrocarbon gas to C5+ hydrocarbons.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: June 12, 2007
    Assignee: ConocoPhillips Company
    Inventors: Rafael L. Espinoza, Kandaswamy Jothimurugesan, Tianyan Niu, Harold A. Wright, Shuibo Xie, Mary E. Wolf
  • Patent number: 7186757
    Abstract: An effective catalyst includes an amorphous silica-alumina support having a bimodal pore size-distribution. The support may be prepared by a method that includes the physical mixing of two silica-alumina gels prepared so as to have two different average pore sizes. The catalyst has the advantage that both metal dispersion on the support and product diffusion in the pores are optimized. Further, the catalyst has improved performance in the production of hydrocarbons from synthesis gas.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: March 6, 2007
    Assignee: ConocoPhillips Company
    Inventors: Rafael L. Espinoza, Kandaswamy Jothimurugesan, Kevin L. Coy