Patents by Inventor David G. Hammond

David G. Hammond 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).

  • Patent number: 9868915
    Abstract: Systems and methods are provided for use of coking and slurry hydroconversion for conversion of heavy oil feeds. The combination of coking and slurry hydroconversion allows for improved yield of liquid products while reducing or minimizing the consumption of hydrogen in slurry hydroconversion reaction stages. Coking and slurry hydroconversion can be combined by segregating feeds based on Conradson carbon residue. Alternatively, slurry hydroconversion can be used to process unconverted bottoms from a coking process.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: January 16, 2018
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Randolph J. Smiley, Anjaneya Sarma Kovvali, David G. Hammond, Grace Shi Qian Yeo
  • Publication number: 20150008157
    Abstract: Systems and methods are provided for use of coking and slurry hydroconversion for conversion of heavy oil feeds. The combination of coking and slurry hydroconversion allows for improved yield of liquid products while reducing or minimizing the consumption of hydrogen in slurry hydroconversion reaction stages. Coking and slurry hydroconversion can be combined by segregating feeds based on Conradson carbon residue. Alternatively, slurry hydroconversion can be used to process unconverted bottoms from a coking process.
    Type: Application
    Filed: June 19, 2014
    Publication date: January 8, 2015
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: Randolph J. Smiley, Anjaneya Sarma KOVVALI, David G. HAMMOND, Grace Shi Qian YEO
  • Patent number: 8389585
    Abstract: The embodiments of the present invention are characterized by degasifying a portion of a gas and slurry mixture in a three-phase slurry process and lowering the solids content of the degassed slurry portion to below about 20 wt %. The degassed and lowered solids content slurry portion is then introduced into a fines separation device for separation and removal of fines. The foregoing procedure has been found to increase the effectiveness of the fines separation device.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: March 5, 2013
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: David G. Hammond, Jorge L. Soto, F. Craig Moates
  • Patent number: 8114915
    Abstract: A method and system for collecting a plurality of slurries containing solid particles of varying particle size distribution and amount and performing a classification and separation on the slurries is provided whereby a fines-rich stream and a stream containing substantially coarse particles is obtained. The method and system includes separating the fines from the slurry liquid and thickening the separated coarse particles in a settling zone for subsequent use.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: February 14, 2012
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: David G. Hammond, Jorge L. Soto
  • Patent number: 8022109
    Abstract: A filter system for use in a three-phase slurry reactor is provided. The filter system comprises one or more bundles of a plurality of filter elements for separating liquid from a mixture of liquid and solids contained in the reactor. Each filter bundle is connected to a product transfer conduit transporting separated liquid to a location outside of and downstream from the reactor. The transfer conduit is provided with means for backflushing the filter bundle and guard filter means.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: September 20, 2011
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: David G. Hammond, David C. Long, Paul K. Ladwig, Min Chang
  • Publication number: 20100210739
    Abstract: The embodiments of the present invention are characterized by degasifying a portion of a gas and slurry mixture in a three-phase slurry process and lowering the solids content of the degassed slurry portion to below about 20 wt %. The degassed and lowered solids content slurry portion is then introduced into a fines separation device for separation and removal of fines. The foregoing procedure has been found to increase the effectiveness of the fines separation device.
    Type: Application
    Filed: January 26, 2010
    Publication date: August 19, 2010
    Inventors: David G. Hammond, Jorge L. Soto, F. Craig Moates
  • Publication number: 20100160459
    Abstract: A filter system for use in a three-phase slurry reactor is provided. The filter system comprises one or more bundles of a plurality of filter elements for separating liquid from a mixture of liquid and solids contained in the reactor. Each filter bundle is connected to a product transfer conduit transporting separated liquid to a location outside of and downstream from the reactor. The transfer conduit is provided with means for backflushing the filter bundle and guard filter means.
    Type: Application
    Filed: November 20, 2009
    Publication date: June 24, 2010
    Inventors: David G. Hammond, David C. Long, Paul K. Ladwig, Min Chang
  • Publication number: 20100144906
    Abstract: A method and system for collecting a plurality of slurries containing solid particles of varying particle size distribution and amount and performing a classification and separation on the slurries is provided whereby a fines-rich stream and a stream containing substantially coarse particles is obtained. The method and system includes separating the fines from the slurry liquid and thickening the separated coarse particles in a settling zone for subsequent use.
    Type: Application
    Filed: November 10, 2009
    Publication date: June 10, 2010
    Inventors: David G. Hammond, Jorge L. Soto
  • Patent number: 6201026
    Abstract: Pest infestations of plant materials are controlled by the application of vaporized organic aldehydes of 3 or more carbon atoms, with at least the initial part of the exposure being performed under a subatmospheric pressure.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: March 13, 2001
    Assignee: The Regents of the University of California
    Inventors: David G. Hammond, Isao Kubo
  • Patent number: 6077521
    Abstract: Mosquito abatement is effected by administering to a water source containing mosquitoes an effective amount of a water-insoluble alcohol in a water-miscible form. The water-miscible form is provided in a wide variety of ways such as mechanical agitation (e.g. sonication), addition of a surfactant (e.g. a detergent), etc. The invention also provides labeled containers, including dispensers, containing a composition comprising a water-insoluble alcohol in a water miscible form and an affixed legible label providing instructions for the use of the composition for mosquito abatement.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: June 20, 2000
    Assignee: The Regents of the University of California
    Inventors: David G. Hammond, Isao Kubo
  • Patent number: 5919352
    Abstract: A process wherein a residuum feedstock is upgraded in a short vapor contact time thermal process unit comprised of a horizontal moving bed of fluidized hot particles, then fed to a fluid catalytic cracking process unit. Hot flue gases from the fluid catalytic cracking unit is used to circulate solid particles and to provide process heat to the thermal process unit.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: July 6, 1999
    Assignee: Exxon Research and Engineering Co.
    Inventors: Willibald Serrand, David G. Hammond, Mitchell Jacobson, John F. Pagel, Martin C. Poole
  • Patent number: 5879535
    Abstract: A two-stage process for obtaining a substantial amount of olefinic product from a residua feedstock. The first stage is comprised of a thermal process unit containing a reaction zone comprised of a horizontal moving bed of fluidized hot particles operated at temperatures from about 500.degree. to 600.degree. C. and having a short vapor residence time, and the second stage thermal conversion zone operated at a temperature of about 700.degree. C. to about 1100.degree. C., and also having a short vapor residence time.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: March 9, 1999
    Assignee: Exxon Research and Engineering Company
    Inventors: Willibald Serrand, Mitchell Jacobson, Michael R. Parrish, David G. Hammond
  • Patent number: 5714056
    Abstract: A process for deasphalting a residua feedstock by use of a short vapor contact time thermal process unit comprised of a horizontal moving bed of fluidized hot particles. It is preferred that a mechanical means be used to fluidize a bed of hot particles.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: February 3, 1998
    Assignee: Exxon Research and Engineering Company
    Inventors: David G. Hammond, Mitchell Jacobson, John F. Pagel, Martin C. Poole, Willibald Serrand
  • Patent number: 5658455
    Abstract: An improved fluidized bed coking process wherein a residuum feedstock is introduced into a first stage comprised of a short vapor contact time reactor containing a horizontal moving bed of fluidized hot particles. Carbonaceous material is deposited onto the hot particles on contact with the hot particles, and a vapor product is produced. The hot particles, containing the carbonaceous deposits, are fed to a second stage fluidized bed coking process.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: August 19, 1997
    Assignee: Exxon Research & Engineering Company
    Inventors: David G. Hammond, Mitchell Jacobson, John F. Pagel, Martin C. Poole, Robert C. Green, Willibald Serrand