Patents by Inventor Cong-Yan Chen

Cong-Yan Chen 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).

  • Multi-Stage Hydroprocessing for the Production of High Octane Naphtha
    Publication number: 20120024752
    Abstract: An integrated process is provided for producing high octane naphtha. Hydrocracked naphtha from a hydrocracking reaction zone is contacted with a reforming catalyst that includes a silicate having a silica to alumina molar ratio of at least 200, and a crystallite size of less than 10 microns. Products from the reforming include a reformed naphtha and a hydrogen-rich stream, which is passed to the hydrocracking reaction zone.
    Type: Application
    Filed: July 28, 2010
    Publication date: February 2, 2012
    Inventors: Cong-Yan Chen, Stephen J. Miller, James N. Ziemer, Ann J. Liang
  • MULTI-STAGE REFORMING PROCESS TO PRODUCE HIGH OCTANE GASOLINE
    Publication number: 20120024753
    Abstract: The present invention relates to a multistage reforming process to produce a high octane product. A naphtha boiling range feedstock is processed in a multi-stage reforming process, in which said process involves at least 1) a penultimate stage for reforming the naphtha feedstock to produce a penultimate effluent 2) a final stage for further reforming at least a portion of the penultimate effluent 3) a regeneration step for the final stage catalyst. The severity of the penultimate stage can be increased during final stage catalyst regeneration in order to maintain the target RON of the reformate product and avoid reactor downtime.
    Type: Application
    Filed: July 28, 2010
    Publication date: February 2, 2012
    Inventors: Cong-Yan Chen, Stephen J. Miller, James N. Ziemer, Ann J. Liang
  • HYDROISOMERIZATION PROCESS USING MOLECULAR SIEVE SSZ-81
    Publication number: 20110319696
    Abstract: The present invention is directed to a hydroisomerization process using a new crystalline molecular sieve designated SSZ-81, which is synthesized using a structure directing agent selected from 1,5-bis(1-azonia-bicyclo[2.2.2]octane)pentane dications, 1,5-bis(1,4-diazabicyclo[2.2.2]octane)pentane dications, and mixtures thereof.
    Type: Application
    Filed: June 16, 2011
    Publication date: December 29, 2011
    Applicant: Chevron U.S.A
    Inventors: Cong-Yan Chen, Stacey I. Zones
  • PROCESS AND CATALYSTS FOR REFORMING FISHER TROPSCH NAPHTHAS TO AROMATICS
    Publication number: 20100160700
    Abstract: Improved processes and catalysts are described for the conversion of oxygenate-containing olefinic Fischer Tropsch naphtha into aromatics. This involves removal of the oxygenates without complete saturation of the olefins followed by aromatization of the oxygenate-depleted olefinic naphtha preferably over a catalyst that is tolerant to oxygenates.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 24, 2010
    Inventors: Dennis J O'Rear, Cong-Yan Chen, Stephen J. Miller
  • CATALYTIC REFORMING PROCESS TO PRODUCE HIGH OCTANE GASOLINE
    Publication number: 20090301933
    Abstract: The present invention is a multistage reforming process to produce high octane product from naphtha boiling range feed. In the process, a effluent product from a penultimate reforming stage is separated into at least a first stream and a second stream by boiling point. The lower boiling of the two streams is further reformed in a final reforming stage over a medium pore molecular sieve catalyst.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 10, 2009
    Inventors: Stephen Joseph Miller, Cong-Yan Chen, Brian C. Adams, James N. Ziemer
  • MULTI-STAGE REFORMING PROCESS TO PRODUCE HIGH OCTANE GASOLINE
    Publication number: 20090301934
    Abstract: The present invention relates to a multistage reforming process to produce a high octane product. A naphtha boiling range feedstock is processed in a multi-stage reforming process, in which said process involves at least 1) a penultimate stage for reforming the naphtha feedstock to produce a penultimate effluent 2) a separation step for separating the penultimate effluent into at least an intermediate stream and a heavy stream based on boiling point and 3) a final stage for further reforming the intermediate stream.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 10, 2009
    Inventors: Stephen Joseph Miller, Cong-Yan Chen, Brian C. Adams, James N. Ziemer
  • METHOD OF UPGRADING HEAVY HYDROCARBON STREAMS TO JET AND DIESEL PRODUCTS
    Publication number: 20090200201
    Abstract: The present invention is directed to a process for converting heavy hydrocarbonaceous feeds to jet and diesel products: using a single reactor, dual catalyst system; or using a single reactor, multiple catalyst system.
    Type: Application
    Filed: February 12, 2008
    Publication date: August 13, 2009
    Applicant: CHEVRON U.S.A. INC.
    Inventor: Cong-Yan Chen
  • Hydrocarbon conversion using molecular sieve SSZ-71
    Patent number: 7537685
    Abstract: The present invention relates to new molecular sieve SSZ-71 prepared using a N-benzyl-1,4-diazabicyclo[2.2.2]octane cation as a structure-directing agent, methods for synthesizing SSZ-71 and processes employing SSZ-71 in a catalyst.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: May 26, 2009
    Assignee: Chevron U.S.A. Inc.
    Inventors: Cong-Yan Chen, Allen W. Burton, Jr., Ann J. Liang
  • METHOD OF UPGRADING HEAVY HYDROCARBON STREAMS TO JET PRODUCTS
    Publication number: 20090114566
    Abstract: A process of upgrading a heavy hydrocarbon feedstock comprising contacting a heavy hydrocarbon feedstock with a catalyst in the presence of hydrogen in a reactor system, containing the catalyst as the only catalyst, wherein the catalyst, is prepared by sulfiding a catalyst precursor obtained by mixing at reaction conditions, to form a precipitate or cogel, at least a Promoter metal compound in solution; at least a Group VIB metal compound in solution; and, at least an organic oxygen containing ligand in solution, and thereby producing a fuel product.
    Type: Application
    Filed: October 29, 2008
    Publication date: May 7, 2009
    Applicant: Chevron U.S.A. Inc.
    Inventors: Cong-Yan Chen, Alexander E. Kuperman
  • Zinc-containing zeolite with IFR framework topology
    Patent number: 7527778
    Abstract: A process is disclosed for preparing a zinc-containing molecular sieve having IFR framework topology and having zinc atoms in its crystal framework, said process comprising: (a) preparing an aqueous mixture containing sources of silicon oxide, zinc oxide, an alkali metal, and an N-benzyl-1,4-diazabicyclo[2.2.2]octane cation having an anionic counterion which is not detrimental to the formation of the molecular sieve; and (b) maintaining the aqueous mixture under conditions sufficient to form crystals of the molecular sieve.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: May 5, 2009
    Assignee: Chevron U.S.A. Inc.
    Inventor: Cong-Yan Chen
  • METHOD OF UPGRADING HEAVY HYDROCARBON STREAMS TO JET PRODUCTS
    Publication number: 20090107880
    Abstract: A process of upgrading a heavy hydrocarbon feedstock comprising contacting a heavy hydrocarbon feedstock with a catalyst in the presence of hydrogen in a reactor system, containing the catalyst as the only catalyst, wherein the catalyst, is prepared by sulfiding a catalyst precursor obtained by mixing at reaction conditions, to form a precipitate or cogel, at least a Group VIII metal compound in solution; at least a Group VIB metal compound in solution; and, at least an organic oxygen containing ligand in solution, and thereby producing a fuel product.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Inventors: Cong-Yan Chen, Alexander E. Kuperman
  • Process for preparation and use of alcohols from a Fischer Tropsch process
    Publication number: 20080250705
    Abstract: Olefins and alcohols present in Fischer-Tropsch products are converted to primary and secondary alkyl alcohols having at least four carbons through acid catalyzed etherification and hydrolysis reactions. The alcohols are added to a highly isoparaffinic distillate fuel blend, improving the lubricity of the mixture, and forming a distillate fuel with improved lubricity.
    Type: Application
    Filed: June 17, 2008
    Publication date: October 16, 2008
    Applicant: CHEVRON U.S.A. INC.
    Inventors: Dennis J. O'Rear, Thomas Van Harris, Cong-Yan Chen
  • Recovery of alcohols from Fischer-Tropsch naphtha and distillate fuels containing the same
    Patent number: 7402187
    Abstract: Olefins and alcohols present in Fischer-Tropsch products are converted to primary and secondary alkyl alcohols having at least four carbons through acid catalyzed etherification and hydrolysis reactions. The alcohols are added to a highly isoparaffinic distillate fuel blend, improving the lubricity of the mixture, and forming a distillate fuel with improved lubricity.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: July 22, 2008
    Assignee: Chevron U.S.A. Inc.
    Inventors: Dennis J. O'Rear, Thomas Van Harris, Cong-Yan Chen
  • ZINC-CONTAINING ZEOLITE WITH IFR FRAMEWORK TOPOLOGY
    Publication number: 20070292343
    Abstract: A process is disclosed for preparing a zinc-containing molecular sieve having IFR framework topology and having zinc atoms in its crystal framework, said process comprising: (a) preparing an aqueous mixture containing sources of silicon oxide, zinc oxide, an alkali metal, and an N-benzyl-1,4-diazabicyclo[2.2.
    Type: Application
    Filed: June 7, 2007
    Publication date: December 20, 2007
    Inventor: Cong-Yan Chen
  • AS-SYNTHESIZED ALL-SILICA ZEOLITE WITH IFR STRUCTURE
    Publication number: 20070253895
    Abstract: An all-silica zeolite having the IFR framework topology can be directly synthesized by preparing a reaction mixture comprising (1) an active source of silicon oxide, (2) a structure directing agent comprising a N-benzyl-1,4-diazabicyclo[2.2.2] octane cation, (3) an active source of hydroxide and (4) water and maintaining the reaction mixture under conditions sufficient to form crystals of the zeolite.
    Type: Application
    Filed: May 21, 2007
    Publication date: November 1, 2007
    Inventors: Cong-Yan Chen, Stacey Zones
  • Method of making all-silica zeolite with IFR structure
    Patent number: 7238337
    Abstract: An all-silica zeolite having the IFR framework topology can be directly synthesized by preparing a reaction mixture comprising (1) an active source of silicon oxide, (2) a structure directing agent comprising a N-benzyl-1,4-diazabicyclo[2.2.2] octane cation, (3) an active source of hydroxide and (4) water and maintaining the reaction mixture under conditions sufficient to form crystals of the zeolite.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: July 3, 2007
    Assignee: Chevron U.S.A. Inc.
    Inventor: Cong-Yan Chen
  • METHOD OF MAKING ALL-SILICA ZEOLITE WITH IFR STRUCTURE
    Publication number: 20070098630
    Abstract: An all-silica zeolite having the IFR framework topology can be directly synthesized by preparing a reaction mixture comprising (1) an active source of silicon oxide, (2) a structure directing agent comprising a N-benzyl-1,4-diazabicyclo[2.2.2] octane cation, (3) an active source of hydroxide and (4) water and maintaining the reaction mixture under conditions sufficient to form crystals of the zeolite.
    Type: Application
    Filed: October 31, 2005
    Publication date: May 3, 2007
    Inventor: Cong-Yan Chen
  • Catalyst and process for selective hydroconversion of normal paraffins to normal paraffin-rich lighter products
    Publication number: 20070032692
    Abstract: A process and catalyst are suitable for hydroconverting heavy normal paraffins into lighter normal paraffin products with minimal formation of isoparaffins. The process and catalyst can be used on any feed that contains heavy normal paraffins such as waxy lubricant fractions, slack wax or Fischer Tropsch products. By selectively forming a normal paraffin rich product from heavy normal paraffins, the need for normal paraffin separation and purification processes can be reduced or eliminated.
    Type: Application
    Filed: August 7, 2006
    Publication date: February 8, 2007
    Inventors: Dennis O'Rear, Saleh Elomari, Thomas Harris, Cong-Yan Chen
  • Acylation using molecular sieve SSZ-71
    Patent number: 7091385
    Abstract: The present invention relates to new molecular sieve SSZ-71 prepared using a N-benzyl-1,4-diazabicyclo[2.2.2]octane cation as a structure-directing agent, methods for synthesizing SSZ-71 and processes employing SSZ-71 in a catalyst.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: August 15, 2006
    Assignee: Chevron U.S.A. Inc.
    Inventors: Cong-Yan Chen, Allen W. Burton, Jr., Ann J. Liang
  • Partial oxidation using molecular sieve SSZ-71
    Patent number: 7087792
    Abstract: The present invention relates to new molecular sieve SSZ-71 prepared using a N-benzyl-1,4-diazabicyclo[2.2.2]octane cation as a structure-directing agent, methods for synthesizing SSZ-71 and processes employing SSZ-71 in a catalyst.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: August 8, 2006
    Assignee: Chevron U.S.A. Inc.
    Inventors: Cong-Yan Chen, Allen W. Burton, Jr., Ann J. Liang