Patents by Inventor Shuwu Yang

Shuwu Yang 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: 20120172203
    Abstract: An improved process for preparing a slurry catalyst for the upgrade of heavy oil feedstock is provided. In the process, high shear mixing is employed to generate an emulsion containing droplets of metal precursor in oil with droplet sizes ranging from 0.1 to 300 ?m. The emulsion is subsequently sulfided with a sulfiding agent, or in-situ in a heavy oil feedstock to form a slurry catalyst. The in-situ sulfidation in heavy oil is under sufficient condition for the heavy oil feedstock to generate the sulfiding source needed for the sulfidation.
    Type: Application
    Filed: December 20, 2011
    Publication date: July 5, 2012
    Inventors: Oleg Mironov, Alexander E. Kuperman, Juli Chabot, Shuwu Yang, Joseph V. Nguyen, Ling Jiao, Bruce Edward Reynolds, Axel Brait, Kenneth Kwik, Modinat Kotun
  • Publication number: 20120172202
    Abstract: A process for preparing a slurry catalyst for the upgrade of heavy oil feedstock is provided. The process employs a pressure leach solution obtained from a metal recovery process as part of the metal precursor feed. In one embodiment, the process comprises: sulfiding a pressure leach solution having at least a Group VIB metal precursor compound in solution forming a catalyst precursor, and mixing the sulfided catalyst precursor with a hydrocarbon diluent to form the slurry catalyst. In another embodiment, the pressure leach solution is mixed with a hydrocarbon diluent under high shear mixing conditions to form an emulsion, which emulsion can be sulfided in-situ upon contact with a heavy oil feedstock in the heavy oil upgrade process.
    Type: Application
    Filed: December 20, 2011
    Publication date: July 5, 2012
    Applicant: Chevron Corporation
    Inventors: Oleg Mironov, Alexander E. Kuperman, Rahul Shankar Bhaduri, Julie Chabot, Shuwu Yang, Joseph V. Nguyen, Ling Jiao, Bruce Edward Reynolds
  • Publication number: 20120172204
    Abstract: An improved hydroprocessing slurry catalyst is provided for the upgrade of heavy oil feedstock. The catalyst comprises dispersed particles in a hydrocarbon medium with the dispersed particles have an average particle size ranging from 1 to 300 ?m. The catalyst has a total pore volume of at least 0.5 cc/g and a polymodal pore distribution with at least 80% of pore sizes in the range of 5 to 2,000 Angstroms in diameter. The catalyst is prepared from sulfiding and dispersing a metal precursor solution in a hydrocarbon diluent, the metal precursor comprising at least a Primary metal precursor and optionally a Promoter metal precursor, the metal precursor solution having a pH of at least 4 and a concentration of less than 10 wt. % of Primary metal in solution.
    Type: Application
    Filed: December 20, 2011
    Publication date: July 5, 2012
    Inventors: Ling Jiao, Julie Chabot, Joseph V. Nguyen, Christopher Paul Dunckley, Shuwu Yang, Erin P. Maris, Oleg Mironov, Bruce Edward Reynolds, Alexander E. Kuperman
  • Publication number: 20120152805
    Abstract: A method to upgrade heavy oil feedstock using an ebullated bed reactor and a novel catalyst system is provided. The ebullated bed reactor system includes two different catalyst with different characteristics: an expanded catalyst zone containing particulate catalyst having a particle size of greater than 0.65 mm; and a slurry catalyst having an average particle size ranging from 1 to 300 ?m. The slurry catalyst is provided to the ebullated bed system containing the heavy oil feedstock, and entrained in the upflowing hydrocarbon liquid passing through the ebullated bed reaction zone. The slurry catalyst reduces the formation of sediment and coke precursors in the ebullating bed reactor system. The slurry catalyst is prepared from rework materials, which form a slurry catalyst in-situ upon mixing with the heavy oil feedstock.
    Type: Application
    Filed: December 20, 2011
    Publication date: June 21, 2012
    Inventors: Julie Chabot, Bruce E. Reynolds, Erin Maris, Shuwu Yang
  • Publication number: 20120000821
    Abstract: A method to reduce metal deposit in the hydroprocessing or upgrade of heavy oil feedstock is provided. The method comprises feeding an improved catalyst feed to the system, with the improved catalyst feed comprising a fresh slurry catalyst and a deoiled spent catalyst, with the deoiled spent catalyst being present in an amount of at least 10% the catalyst feed for the heavy oil upgrade system to have at least a 5% reduction in metal contaminant build-up compared to heavy oil upgrade system without the deoiled spent catalyst in the feed.
    Type: Application
    Filed: September 15, 2011
    Publication date: January 5, 2012
    Applicant: Chevron Corporation
    Inventors: Shuwu Yang, Julie Chabot, Bruce Edward Reynolds, Bo Kou
  • Publication number: 20120004097
    Abstract: An improved slurry catalyst feed system for heavy oil upgraded is provided. The catalyst feed system comprises a fresh slurry catalyst and a deoiled spent catalyst, with the deoiled spent catalyst being present in an amount of at least 10% the catalyst feed system. The deoiled spent catalyst is a slurry catalyst that has been used in a hydroprocessing operation resulting in than 80% but more than 10% of original catalytic activity, and containing less than 10 wt. % soluble hydrocarbons as unconverted heavy oil feed. The deoiled spent catalyst is slurried in a hydrocarbon medium as dispersed particles prior to being fed to the heavy oil upgrade system.
    Type: Application
    Filed: September 15, 2011
    Publication date: January 5, 2012
    Inventors: Shuwu Yang, Julie Chabot, Bruce Edward Reynolds
  • Patent number: 8044250
    Abstract: A process for producing hydrofluorocarbon compounds represented by the following formula: CF3CHFCHm+1Fn wherein m is 0 or 2; n is 0 or 2; and m+n=2. The process has the step of contacting, i.e., reacting, hydrogen with a precursor compound represented by the following formula: CF3CF?CHmFn wherein m is 0 or 2; n is 0 or 2; and m+n=2. The contact is carried out in the presence of a solid catalyst and in the presence or absence of an inert gas. The catalyst is selected from the group consisting of: Fe, Co, Ni, Cu, Cr, Ru, Rh, Ag, Re, Os, Ir, Pt, Au, Sn, and any combinations thereof. For the hydrogenation of 1234yf to 254eb, Pd can also be used as catalyst in addition to the other above-referenced metals. These metals are preferably supported on a carrier such as activated carbon.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: October 25, 2011
    Assignee: Honeywell International Inc.
    Inventors: Shuwu Yang, Hsueh Sung Tung
  • Patent number: 8034985
    Abstract: A process for the preparation of a fluoroiodoalkane compound represented by the formula: CF3(CF2)n—Y, wherein n is 0 or 1. The process includes contacting A, B and C. A is represented by the formula: CF3(CF2)n—Y, wherein n is 0 or 1, and Y is selected from the group consisting of: H, Cl, Br, and COOH. B is a source of iodine, and C is a catalyst containing elements with d1s1 configuration and lanthanide elements. The process occurs at a temperature, and for a contact time, sufficient to produce the fluoroiodoalkane compound.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: October 11, 2011
    Assignee: Honeywell International, Ltd.
    Inventors: Shuwu Yang, HsuehSung Tung
  • Publication number: 20110210045
    Abstract: Systems and methods for hydroprocessing heavy oil feedstock is disclosed. The process employs a plurality of contacting zones and at least a separation zone to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products. In one embodiment, water and/or steam being injected into at least a contacting zone. The contacting zones operate under hydrocracking conditions, employing at least a slurry catalyst. In one embodiment, at least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to at least a contacting zone (“recycled mode”). In one embodiment, the number of separation zones is less than the number of contacting zones in the system. In the separation zones, upgraded products are removed overhead and optionally treated in an in-line hydrotreater; and the bottom stream is optionally further treated in a fractionator.
    Type: Application
    Filed: May 9, 2011
    Publication date: September 1, 2011
    Applicant: c/o Chevron Corporation
    Inventors: Bo Kou, Shuwu Yang, Bruce Reynolds, Julie Chabot
  • Patent number: 7938954
    Abstract: Systems and methods for hydroprocessing a heavy oil feedstock with reduced heavy oil deposits, the system employs a plurality of contacting zones and separation zones zone under hydrocracking conditions to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and optionally, further treated in an in-line hydrotreater. At least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to the first contacting zone in the system, in an amount ranging between 3 to 50 wt. % of the heavy oil feedstock.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: May 10, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Julie Chabot, Bo Kou, Vivion Andrew Brennan, Erin Maris, Shuwu Yang, Bruce Reynolds
  • Patent number: 7935243
    Abstract: Systems and methods for hydroprocessing a heavy oil feedstock with reduced heavy oil deposits, the system employs a plurality of contacting zones and separation zones zone under hydrocracking conditions to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products, wherein the first contacting zone is operated at a temperature of at least 10° F. lower than a next contacting zone. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and, optionally, further treated in an in-line hydrotreater. At least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to the first contacting zone in the system.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: May 3, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Julie Chabot, Bo Kou, Vivion Andrew Brennan, Erin Maris, Shuwu Yang
  • Patent number: 7931797
    Abstract: A process for hydroprocessing heavy oil feedstock is disclosed. The process operates in once-through mode, employing a plurality of contacting zones and at least a separation zone to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products. In the once-through upgrade system, little if any of the unconverted material and slurry catalyst mixture is recycled back to the system for further upgrading. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock. The slurry catalyst feed comprises an active metal catalyst having an average particle size of at least 1 micron in a hydrocarbon oil diluent, at a concentration of greater than 500 wppm of active metal catalyst to heavy oil feedstock.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: April 26, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Julie Chabot, Shuwu Yang, Bruce Reynolds
  • Patent number: 7897036
    Abstract: Systems and methods for hydroprocessing a heavy oil feedstock with reduced heavy oil deposits, the system employs a plurality of contacting zones and separation zones zone under hydrocracking conditions to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products, wherein water and/or steam being injected into first contacting zone in an amount of 1 to 25 weight % on the weight of the heavy oil feedstock. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and optionally, further treated in an in-line hydrotreater. At least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to the first contacting zone in the system.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: March 1, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Julie Chabot, Bo Kou, Vivion Andrew Brennan, Erin Maris, Shuwu Yang
  • Publication number: 20110017635
    Abstract: A process for hydroprocessing heavy oil feedstock is disclosed. The process operates in once-through mode, employing a plurality of contacting zones and at least a separation zone to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products. In the once-through upgrade system, little if any of the unconverted material and slurry catalyst mixture is recycled back to the system for further upgrading. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock. The slurry catalyst feed comprises an active metal catalyst having an average particle size of at least 1 micron in a hydrocarbon oil diluent, at a concentration of greater than 500 wppm of active metal catalyst to heavy oil feedstock.
    Type: Application
    Filed: July 21, 2009
    Publication date: January 27, 2011
    Inventors: Julie Chabot, Shuwu Yang, Bruce Reynolds
  • Publication number: 20100065474
    Abstract: Systems and methods for hydroprocessing a heavy oil feedstock with reduced heavy oil deposits, the system employs a plurality of contacting zones and separation zones zone under hydrocracking conditions to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products, wherein the first contacting zone is operated at a temperature of at least 10° F. lower than a next contacting zone. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and optionally, further treated in an in-line hydrotreater. At least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to the first contacting zone in the system.
    Type: Application
    Filed: September 18, 2008
    Publication date: March 18, 2010
    Inventors: Julie Chabot, Bo Kou, Vivion Andrew Brennan, Erin Maris, Shuwu Yang
  • Publication number: 20100065473
    Abstract: Systems and methods for hydroprocessing a heavy oil feedstock with reduced heavy oil deposits, the system employs a plurality of contacting zones and separation zones zone under hydrocracking conditions to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products, wherein water and/or steam being injected into first contacting zone in an amount of 1 to 25 weight % on the weight of the heavy oil feedstock. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and optionally, further treated in an in-line hydrotreater. At least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to the first contacting zone in the system.
    Type: Application
    Filed: September 18, 2008
    Publication date: March 18, 2010
    Inventors: Julie Chabot, Bo Kou, Vivion Andrew Brennan, Erin Maris, Shuwu Yang
  • Publication number: 20090137852
    Abstract: A process for the preparation of a fluoroiodoalkane represented by the structural formula CF3(CF2)n—I, wherein n is 0 or 1. The process has the step of reacting a source of iodine with a compound represented by the structural formula CF3(CF2)n—Y, wherein Y is selected from H, Cl, Br and COOH and wherein n is 0 or 1. The reaction is carried out at a temperature from about 100° C. to about 750° C. and at a pressure from about 0.001 to about 100 atm for a contact time from about 0.001 second to about 300 hours in the presence a catalyst.
    Type: Application
    Filed: November 4, 2008
    Publication date: May 28, 2009
    Inventors: Shuwu Yang, Hsueh Sung Tung
  • Publication number: 20090131727
    Abstract: A process for producing hydrofluorocarbon compounds represented by the following formula: CF3CHFCHm+1Fn wherein m is 0 or 2; n is 0 or 2; and m+n=2. The process has the step of contacting, i.e., reacting, hydrogen with a precursor compound represented by the following formula: CF3CF?CHmFn wherein m is 0 or 2; n is 0 or 2; and m+n=2. The contact is carried out in the presence of a solid catalyst and in the presence or absence of an inert gas. The catalyst is selected from the group consisting of: Fe, Co, Ni, Cu, Cr, Ru, Rh, Ag, Re, Os, Ir, Pt, Au, Sn, and any combinations thereof. For the hydrogenation of 1234yf to 254eb, Pd can also be used as catalyst in addition to the other above-referenced metals. These metals are preferably supported on a carrier such as activated carbon.
    Type: Application
    Filed: November 4, 2008
    Publication date: May 21, 2009
    Inventors: Shuwu Yang, Hsueh Sung Tung
  • Publication number: 20090008291
    Abstract: Systems and methods for hydroprocessing a heavy oil feedstock with reduced heavy oil deposits, the system employs a plurality of contacting zones and separation zones zone under hydrocracking conditions to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and optionally, further treated in an in-line hydrotreater. At least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to the first contacting zone in the system, in an amount ranging between 3 to 50 wt. % of the heavy oil feedstock.
    Type: Application
    Filed: September 18, 2008
    Publication date: January 8, 2009
    Inventors: Julie Chabot, Bo Kou, Vivion Andrew Brennan, Erin Maris, Shuwu Yang, Bruce Reynolds
  • Publication number: 20080200735
    Abstract: A process for the preparation of a fluoroiodoalkane compound represented by the formula: CF3(CF2)n—Y, wherein n is 0 or 1. The process includes contacting A, B and C. A is represented by the formula: CF3(CF2)n—Y, wherein n is 0 or 1, and Y is selected from the group consisting of: H, Cl, Br, and COOH. B is a source of iodine, and C is a catalyst containing elements with d1s1 configuration and lanthanide elements. The process occurs at a temperature, and for a contact time, sufficient to produce the fluoroiodoalkane compound.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 21, 2008
    Inventors: Shuwu Yang, HsuehSung Tung