Patents by Inventor Robert B. Larson

Robert B. Larson 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).

  • Ethylbenzene conversion and xylene isomerization processes and catalysts therefor
    Patent number: 7456125
    Abstract: Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene and dealkylating ethylbenzene in feed streams that exhibit stability, selectivity and low ring loss.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: November 25, 2008
    Assignee: UOP LLC
    Inventors: Paula L. Bogdan, Patrick C. Whitchurch, Robert B. Larson, James E. Rekoske, Dimitri A. Trufanov, Victor C. Patton, Suheil F. Abdo
  • Ethylbenzene conversion and xylene isomerization processes and catalysts therefor
    Patent number: 7446237
    Abstract: Catalysts comprise a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component and a sufficient amount of at least one platinum group metal hydrogenation component to enhance the isomerization activity of the catalyst.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: November 4, 2008
    Assignee: UOP LLC
    Inventors: Paula L. Bogdan, Patrick C. Whitchurch, Robert B. Larson, James E. Rekoske
  • Ethylbenzene conversion and xylene isomerization processes and catalysts therefor
    Patent number: 7425660
    Abstract: Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene and dealkylating ethylbenzene in feed streams that exhibit stability, selectivity and low ring loss.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: September 16, 2008
    Assignee: UOP LLC
    Inventors: Robert B. Larson, James E. Rekoske, Patrick C. Whitchurch, Paula L. Bogdan
  • Synergistic rhenium and germanium-containing catalysts potentiated with tin and alkylaromatic transalkylation processes using such catalysts
    Patent number: 7423190
    Abstract: Transalkylation catalysts comprising acidic molecular sieve, rhenium, tin and germanium have good activities and attenuate aromatic ring saturation and lights co-production.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: September 9, 2008
    Assignee: UOP LLC
    Inventors: Edwin P. Boldingh, Maureen L. Bricker, Robert B. Larson, Frank S. Modica, James E. Rekoske
  • Iridium and germanium-containing catalysts and alkylaromatic transalkylation processes using such catalysts
    Patent number: 7414163
    Abstract: Transalkylation catalysts comprising acidic molecular sieve, iridium and germanium have good activities and attenuate aromatic ring saturation and lights co-production where high atomic ratios of germanium to iridium are present.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: August 19, 2008
    Assignee: UOP LLC
    Inventors: Edwin P. Boldingh, Maureen L. Bricker, Robert B. Larson, Frank S. Modica, James E. Rekoske
  • Selective Aromatics Isomerization Process
    Publication number: 20080146859
    Abstract: This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using a catalyst comprising a zeolite, a platinum-group metal and a silica binder. A relatively minimal amount of hydrogen is supplied to the process on a once-through basis, resulting in low saturation of aromatics while achieving effective xylene isomerization with reduced processing costs.
    Type: Application
    Filed: December 18, 2006
    Publication date: June 19, 2008
    Inventors: James E. Rekoske, Robert B. Larson
  • Ethylbenzene conversion and xylene isomerization processes and catalysts therefor
    Patent number: 7381677
    Abstract: Catalysts comprise a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component and a sufficient amount of at least one platinum group metal hydrogenation component to enhance the isomerization activity of the catalyst.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: June 3, 2008
    Assignee: UOP LLC
    Inventors: Paula L. Bogdan, Patrick C. Whitchurch, Robert B. Larson, James E. Rekoske
  • Iridium and germanium-containing catalysis and alkylaromatic transalkylation processes using such catalysts
    Patent number: 7381674
    Abstract: Transalkylation catalysts comprising acidic molecular sieve, iridium and germanium have good activities and attenuate aromatic ring saturation and lights co-production where high atomic ratios of germanium to iridium are present.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: June 3, 2008
    Assignee: UOP LLC
    Inventors: Edwin P. Boldingh, Maureen L. Bricker, Robert B. Larson, Frank S. Modica, James E. Rekoske
  • Synergistic rhenium and germanium-containing catalysts potentiated with tin and alkylaromatic transalkylation processes using such catalysts
    Patent number: 7378365
    Abstract: Transalkylation catalysts comprising acidic molecular sieve, rhenium, tin and germanium have good activities and attenuate aromatic ring saturation and lights co-production.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: May 27, 2008
    Assignee: UOP LLC
    Inventors: Edwin P. Boldingh, Maureen L. Bricker, Robert B. Larson, Frank S. Modica, James E. Rekoske
  • Ethylbenzene conversion and xylene isomerization processes and catalysts therefor
    Patent number: 7375047
    Abstract: Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene and dealkylating ethylbenzene in feed streams that exhibit stability, selectivity and low ring loss.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: May 20, 2008
    Assignee: UOP LLC
    Inventors: Robert B. Larson, James E. Rekoske, Patrick C. Whitchurch, Paula L. Bogdan
  • Xylene isomerization with an added benzene
    Patent number: 7371914
    Abstract: Xylene isomerization processes, especially those processes in which ethylbenzene is also converted, are beneficially affected by adding benzene to the feed.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: May 13, 2008
    Assignee: UOP LLC
    Inventors: Robert B. Larson, James E. Rekoske, Patrick J. Silady, Patrick C. Whitchurch, Freddie Sandifer
  • Synergistic Rhenium and Germanium-Containing Catalysts Potentiated with Tin and Alkylaromatic Transalkylation Processes Using Such Catalysts
    Publication number: 20080026931
    Abstract: Transalkylation catalysts comprising acidic molecular sieve, rhenium, tin and germanium have good activities and attenuate aromatic ring saturation and lights co-production.
    Type: Application
    Filed: July 28, 2006
    Publication date: January 31, 2008
    Inventors: Edwin P Boldingh, Maureen L. Bricker, Robert B. Larson, Frank S. Modica, James E. Rekoske
  • SYNERGISTIC RHENIUM AND GERMANIUM-CONTAINING CATALYSTS POTENTIATED WITH TIN AND ALKYLAROMATIC TRANSALKYLATION PROCESSES USING SUCH CATALYSTS
    Publication number: 20080027258
    Abstract: Transalkylation catalysts comprising acidic molecular sieve, rhenium, tin and germanium have good activities and attenuate aromatic ring saturation and lights co-production.
    Type: Application
    Filed: July 28, 2006
    Publication date: January 31, 2008
    Inventors: Edwin P. Boldingh, Maureen L. Bricker, Robert B. Larson, Frank S. Modica, James E. Rekoske
  • ENERGY-EFFICIENT PROCESS FOR PARA-XYLENE PRODUCTION
    Publication number: 20070299289
    Abstract: This invention is drawn to a process for producing and recovering one or more high-purity xylene isomers from a feed stream having a substantial content of C9 and heavier hydrocarbons. The feed stream is processed to de-ethylate heavy aromatics, fractionated and passed to a circuit comprising C8-aromatic isomer recovery and isomerization to recover the high-purity xylene isomer with lowered energy costs.
    Type: Application
    Filed: June 21, 2006
    Publication date: December 27, 2007
    Inventors: Leo Bresler, Robert B. Larson
  • Ethylbenzene conversion and xylene isomerization processes and catalysts therefor
    Patent number: 7301064
    Abstract: Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene and dealkylating ethylbenzene in feed streams that exhibit stability, selectivity and low ring loss.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: November 27, 2007
    Assignee: UOP LLC
    Inventors: Paula L. Bogdan, Patrick C. Whitchurch, Robert B. Larson, James E. Rekoske, Dimitri A. Trufanov, Victor C. Patton, Suheil F. Abdo
  • Process for isomerizing non-equilibrium xylene-containing feed streams
    Patent number: 7297830
    Abstract: Reduced co-production of toluene and C9 and higher aromatics such as trimethylbenzene, methylethylbenzene, and diethylbenzene is achieved in processes for the isomerization of xylenes to close to equilibrium using a layered catalyst having a thin outer layer of molecular sieve and hydrogenation metal component on a core, wherein at least about 75 mass-% of the hydrogenation metal component is in the outer layer.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: November 20, 2007
    Assignee: UOP LLC
    Inventors: Paula L. Bogdan, James E. Rekoske, Robert B. Larson, Patrick C. Whitchurch, John E. Bauer, Michael H. Quick