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).
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Patent number: 9868915Abstract: 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: GrantFiled: June 19, 2014Date of Patent: January 16, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Randolph J. Smiley, Anjaneya Sarma Kovvali, David G. Hammond, Grace Shi Qian Yeo
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Publication number: 20150008157Abstract: 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: ApplicationFiled: June 19, 2014Publication date: January 8, 2015Applicant: ExxonMobil Research and Engineering CompanyInventors: Randolph J. Smiley, Anjaneya Sarma KOVVALI, David G. HAMMOND, Grace Shi Qian YEO
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Patent number: 8389585Abstract: 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: GrantFiled: January 26, 2010Date of Patent: March 5, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: David G. Hammond, Jorge L. Soto, F. Craig Moates
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Patent number: 8114915Abstract: 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: GrantFiled: November 10, 2009Date of Patent: February 14, 2012Assignee: ExxonMobil Research and Engineering CompanyInventors: David G. Hammond, Jorge L. Soto
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Patent number: 8022109Abstract: 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: GrantFiled: November 20, 2009Date of Patent: September 20, 2011Assignee: ExxonMobil Research and Engineering CompanyInventors: David G. Hammond, David C. Long, Paul K. Ladwig, Min Chang
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Publication number: 20100210739Abstract: 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: ApplicationFiled: January 26, 2010Publication date: August 19, 2010Inventors: David G. Hammond, Jorge L. Soto, F. Craig Moates
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Publication number: 20100160459Abstract: 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: ApplicationFiled: November 20, 2009Publication date: June 24, 2010Inventors: David G. Hammond, David C. Long, Paul K. Ladwig, Min Chang
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Publication number: 20100144906Abstract: 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: ApplicationFiled: November 10, 2009Publication date: June 10, 2010Inventors: David G. Hammond, Jorge L. Soto
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Patent number: 6201026Abstract: 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: GrantFiled: March 9, 1999Date of Patent: March 13, 2001Assignee: The Regents of the University of CaliforniaInventors: David G. Hammond, Isao Kubo
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Patent number: 6077521Abstract: 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: GrantFiled: April 7, 1998Date of Patent: June 20, 2000Assignee: The Regents of the University of CaliforniaInventors: David G. Hammond, Isao Kubo
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Patent number: 5919352Abstract: 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: GrantFiled: July 17, 1997Date of Patent: July 6, 1999Assignee: Exxon Research and Engineering Co.Inventors: Willibald Serrand, David G. Hammond, Mitchell Jacobson, John F. Pagel, Martin C. Poole
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Patent number: 5879535Abstract: 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: GrantFiled: December 17, 1996Date of Patent: March 9, 1999Assignee: Exxon Research and Engineering CompanyInventors: Willibald Serrand, Mitchell Jacobson, Michael R. Parrish, David G. Hammond
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Patent number: 5714056Abstract: 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: GrantFiled: July 17, 1995Date of Patent: February 3, 1998Assignee: Exxon Research and Engineering CompanyInventors: David G. Hammond, Mitchell Jacobson, John F. Pagel, Martin C. Poole, Willibald Serrand
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Patent number: 5658455Abstract: 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: GrantFiled: July 17, 1995Date of Patent: August 19, 1997Assignee: Exxon Research & Engineering CompanyInventors: David G. Hammond, Mitchell Jacobson, John F. Pagel, Martin C. Poole, Robert C. Green, Willibald Serrand