Patents Represented by Attorney Michael D. Ross
  • Patent number: 8298511
    Abstract: The present invention is directed to a process for preparing CHA-type molecular sieves using at least one cationic 1,4-diazabicyclo[2.2.2]octane-based structure directing agent in conjunction with at least one cationic cyclic nitrogen-containing structure directing agent.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: October 30, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stacey I. Zones
  • Patent number: 8212099
    Abstract: The present invention is directed to processes using a borosilicate ZSM-48 as a catalyst for the selective hydroconversion of heavy normal paraffins into lighter normal paraffin products, with minimal formation of isoparaffins. The borosilicate ZSM-48 molecular sieve has a mole ratio of between 40 and 400 of silicon oxide to boron oxide, synthesized using novel structure directing agents.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: July 3, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventor: Allen W. Burton, Jr.
  • Patent number: 8198501
    Abstract: The present invention is directed to a process for isomerizing light paraffins by using a catalyst containing a zeolite selected from the group consisting of CON- and TUN-type zeolites, and at least one Group VIII metal. It has been found that the CON- and TUN-type zeolite catalysts of the present invention selectively convert C6 paraffins into the more favorable higher octane C6 isomer, namely 2,3-dimethylbetane (RON 101.0), over the less favorable C6 isomer, namely octane 2,2-dimethylbutane (RON 91.8).
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: June 12, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Cong-Yan Chen, Stacey I. Zones
  • Patent number: 8177961
    Abstract: The present invention relates to new crystalline molecular sieve SSZ-75 prepared using a tetramethylene-1,4-bis-(N-methylpyrrolidinium) dication as a structure-directing agent, and its use in catalysts for hydrocarbon conversion reactions.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: May 15, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stacey Zones, Allen Burton, Theodorus Ludovicus Michael Maesen, Berend Smit, Edith Beerdsen
  • Patent number: 8142757
    Abstract: The present invention is directed to a borosilicate ZSM-48 molecular sieve having a mole ratio of between 40 and 400 of silicon oxide to boron oxide, synthesized using novel structure directing agents. Also disclosed are processes using a borosilicate ZSM-48 as a catalyst for the selective hydroconversion of heavy normal paraffins into lighter normal paraffin products, with minimal formation of isoparaffins.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: March 27, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventor: Allen W. Burton, Jr.
  • Patent number: 8101811
    Abstract: An aluminosilicate ZSM-12 may be prepared de novo in a small crystalline form from a reaction mixture containing a source of silica and a source of alumina A small crystalline form of aluminosilicate ZSM-12 may also be prepared from a small crystalline form of borosilicate ZSM-12 by replacement of boron in the borosilicate ZSM-12 framework with aluminum. The aluminosilicate ZSM-12 is useful as an isomerization selective catalyst in processes such as isomerization dewaxing hydrocarbon feedstocks.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: January 24, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Allen W. Burton, Jr., Tracy M. Davis
  • Patent number: 8075871
    Abstract: The present invention is directed to a method for making a new crystalline molecular sieve designated SSZ-83 using a 1,4-bis(N-butylpiperidinium)butane dication or a 1,4-bis(N-butylpyrrolidinium)butane dication as a structure directing agent.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: December 13, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Allen W. Burton, Jr., Stacey I. Zones
  • Patent number: 8057782
    Abstract: Disclosed is a method for preparing crystalline small pore molecular sieves, said method comprising (a) preparing a reaction mixture comprising (1) at least one active source of an oxide of a tetravalent element or mixture of tetravalent elements, (2) optionally at least on active source of an oxide of a trivalent element or mixture of trivalent elements, (3) at least one active source of an alkali metal, (4) seed crystals capable of forming the small pore molecular sieve, (5) a structure directing agent capable of forming the small pore molecular sieve, and (6) an amount of water that is not substantially in excess of the amount required to cause and maintain crystallization of the small pore molecular sieve; and (b) heating said reaction mixture at crystallization conditions for sufficient time to form crystallized material containing crystals of the small pore molecular sieve.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: November 15, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stephen J. Miller, Lun-teh Yuen
  • Patent number: 8007763
    Abstract: Crystalline molecular sieves are prepared using a mixture comprising an organic structure directing agent capable of forming the molecular sieve, and an N,N,N-trialkyl benzyl quaternary ammonium cation.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: August 30, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stacey I. Zones
  • Patent number: 7998457
    Abstract: The present invention is directed to a new crystalline molecular sieve designated SSZ-83 synthesized using a 1,4-bis(N-butylpiperidinium)butane dication or a 1,4-bis(N-butylpyrrolidinium)butane dication as a structure directing agent.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: August 16, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Allen W. Burton, Jr., Stacey I. Zones
  • Patent number: 7906698
    Abstract: The present invention relates to new crystalline molecular sieve SSZ-75 prepared using a tetramethylene-1,4-bis-(N-methylpyrrolidinium) dication as a structure-directing agent, and its use in catalysts for hydrocarbon conversion reactions.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: March 15, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stacey Zones, Allen Burton, Theodorus Ludovicus Michael Maesen, Berend Smit, Edith Beerdsen
  • Patent number: 7906100
    Abstract: The present invention is directed to a method for making new crystalline molecular sieve designated SSZ-79 using 1,8-dimethyl-1,4,8,11-tetraazacyclotetradecane or 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane as a structure directing agent.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: March 15, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventor: Allen Burton
  • Patent number: 7906101
    Abstract: The present invention is directed to a new crystalline molecular sieve designated SSZ-79 synthesized using 1,8-dimethyl-1,4,8,11-tetraazacyclotetradecane or 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane as a structure directing agent.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: March 15, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventor: Allen Burton
  • Patent number: 7906098
    Abstract: The present invention relates to a method for oxidizing CO, comprising: passing a first feed comprising CO and a second feed comprising oxygen, in an oxidation zone, over a catalyst comprising highly dispersed gold on sulfated zirconia, at oxidation conditions, to produce an effluent comprising a lower level of CO than in the first feed.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: March 15, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Alexander E. Kuperman, Michael E. Moir
  • Patent number: 7837978
    Abstract: A process for directly preparing aluminum-containing molecular sieve SSZ-26 using a structure directing agent comprising a cis-N,N-diethyldecahydroquinolinium cation or mixture of a cis-N,N-diethyldecahydroquinolinium cation and a trans-N,N-diethyldecahydroquinolinium cation.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: November 23, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventor: Allen W. Burton, Jr.
  • Patent number: 7682599
    Abstract: The present invention is directed to a process for preparing NES-type zeolites using novel nitrogen-based structure directing agents. The structure directing agents used in preparing NES-type zeolites selected from the group consisting of 1,4-bis(N,N-dimethylcyclohexylammonium) butane dications and 1,5-bis(N,N-dimethylcyclohexylammonium) pentane dications.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: March 23, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventor: Allen W. Burton, Jr.
  • Patent number: 7648694
    Abstract: The present invention is directed to a process for preparing zeolites belonging to the SSZ-26/33 family of zeolites using novel nitrogen-based structure directing agents. The process for preparing the SSZ-26/33 family of zeolites involves using a structure directing agent selected from the group consisting of 1,5-bis(N,N-dimethylcyclohexylammonium)pentane dications, 1,4-bis(N-cyclohexylpiperidinium)butane dications and 1,4-bis(N-cyclopentylpiperidinium)butane dications.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: January 19, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventor: Allen W. Burton, Jr.
  • Patent number: 7597874
    Abstract: The present invention is directed to a process for producing crystalline zeolites from a reaction mixture containing an N,N,N-trialkyl benzyl quaternary ammonium cation as a structure directing agent.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: October 6, 2009
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stephen J. Miller, Lun-Teh Yuen
  • Patent number: 7510697
    Abstract: The present invention relates to new crystalline molecular sieve SSZ-74 prepared using a hexamethylene-1,6-bis-(N-methyl-N-pyrrolidinium) dication as a structure-directing agent, and methods for synthesizing SSZ-74.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: March 31, 2009
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stacey I. Zones, Allen W. Burton, Jr., Kenneth Ong
  • Patent number: 7270915
    Abstract: The present invention relates to novel battery having a first electrode comprising an electrode active material represented by the general formula AaMb(XY4)2Zd, a second electrode which is a counter-electrode to the first electrode; and an electrolyte.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: September 18, 2007
    Assignee: Valence Technology, Inc.
    Inventors: Jeremy Barker, M. Yazid Saidi, Jeffrey Swoyer