Patents by Inventor James Richardson Lattner
James Richardson Lattner 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: 8410230Abstract: Provided are methods of producing polymers with broadened molecular weight and/or composition distribution in a continuous homogeneous polymerization system utilizing reactor temperature gradients, reactor polymer concentration gradients, monomer concentration gradients, catalyst concentration gradients, and combinations thereof in the polymerization reactor. Such methods are particularly suitable when utilizing metallocene catalysts and other single-site catalysts, which generally produce polymers with narrow molecular weight and composition distribution.Type: GrantFiled: April 18, 2011Date of Patent: April 2, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Gabor Kiss, Robert Patrick Reynolds, Jr., John W. Chu, Patrick Brant, James Richardson Lattner
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Patent number: 8399586Abstract: A process for feeding ethylene into a polymerization system includes providing a low-pressure ethylene stream, one or more low-pressure C3 to C20 monomer streams, an optional low-pressure inert solvent/diluent stream, and one or more reactors; metering the low-pressure ethylene stream, the one or more low-pressure C3 to C20 monomer streams, and the optional low-pressure inert solvent/diluent stream; blending the metered low-pressure ethylene stream, the metered one or more low-pressure C3 to C20 monomer streams, and the metered low-pressure optional inert solvent/diluent stream to form an ethylene-carrying low-pressure blended liquid feed stream; pressurizing the ethylene-carrying low-pressure blended liquid feed stream to the polymerization system pressure with one or more high-pressure pumps to thrm an ethylene-carrying high-pressure blended reactor feed stream; and feeding the ethylene-carrying high-pressure blended reactor feed stream to the one or more reactors.Type: GrantFiled: September 3, 2009Date of Patent: March 19, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Gabor Kiss, Robert Patrick Reynolds, Jr., John W. Chu, James Richardson Lattner, Gary D. Mohr
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Patent number: 8080610Abstract: A monomer recycle process for fluid phase in-line blending of polymers is provided.Type: GrantFiled: March 4, 2008Date of Patent: December 20, 2011Assignee: ExxonMobil Research and Engineering CompanyInventors: Gabor Kiss, Alan Anthony Galuska, James Richardson Lattner
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Patent number: 8067512Abstract: Monomer/solvent separation and recycle processes for continuous supercritical, solution and advanced solution polymerization processes for propylene-containing polymers and their blends are provided. The advantageous monomer/solvent separation and recycle process includes heating a polymer-lean recycle stream coming from a gravimetric separator positioned downstream of the reactor to form a heated polymer-lean recycle stream, and subsequently combining the heated polymer-lean recycle stream with the one or more homogenous reactor effluent streams to form a heated reactor effluent mixed stream. The heated reactor effluent mixed stream may then be passed through a pressure let-down valve followed and a gravimetric separator, such as to provide for reduced fouling propensity of the polymer-rich phase and sufficient heating of the polymer-rich phase to be able to pass through the remainder of the processing steps to form a propylene based polymer product without additional heat.Type: GrantFiled: April 3, 2009Date of Patent: November 29, 2011Assignee: Exxonmobil Research and Engineering CompanyInventors: Gabor Kiss, James Richardson Lattner
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Publication number: 20110196115Abstract: Provided are methods of producing polymers with broadened molecular weight and/or composition distribution in a continuous homogeneous polymerization system utilizing reactor temperature gradients, reactor polymer concentration gradients, monomer concentration gradients, catalyst concentration gradients, and combinations thereof in the polymerization reactor. Such methods are particularly suitable when utilizing metallocene catalysts and other single-site catalysts, which generally produce polymers with narrow molecular weight and composition distribution.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Gabor Kiss, Robert Patrick Reynolds, JR., John W. Chu, Patrick Brant, James Richardson Lattner
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Publication number: 20110196116Abstract: Provided are methods of producing polymers with broadened molecular weight and/or composition distribution in a continuous homogeneous polymerization system utilizing reactor temperature gradients, reactor polymer concentration gradients, monomer concentration gradients, catalyst concentration gradients, and combinations thereof in the polymerization reactor. Such methods are particularly suitable when utilizing metallocene catalysts and other single-site catalysts, which generally produce polymers with narrow molecular weight and composition distribution.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Gabor Kiss, Robert Patrick Reynolds, JR., John W. Chu, Patrick Brant, James Richardson Lattner
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Patent number: 7939610Abstract: Provided are methods of producing polymers with broadened molecular weight and/or composition distribution in a continuous homogeneous polymerization system utilizing reactor temperature gradients, reactor polymer concentration gradients, monomer concentration gradients, catalyst concentration gradients, and combinations thereof in the polymerization reactor. Such methods are particularly suitable when utilizing metallocene catalysts and other single-site catalysts, which generally produce polymers with narrow molecular weight and composition distribution.Type: GrantFiled: May 19, 2009Date of Patent: May 10, 2011Assignee: ExxonMobil Research and Engineering CompanyInventors: Gabor Kiss, Robert Patrick Reynolds, Jr., John W. Chu, Patrick Brant, James Richardson Lattner
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Patent number: 7910679Abstract: Provided are bulk homogeneous polymerization processes for producing ethylene propylene random copolymers. The process includes contacting in a reactor or in a series of reactors propylene monomer, ethylene comonomer with one or more catalyst systems and optional solvent (present at less than 40 wt %), wherein the reactor train is at a temperature of between 65° C. and 180° C.Type: GrantFiled: November 14, 2008Date of Patent: March 22, 2011Assignee: ExxonMobil Research and Engineering CompanyInventors: Gabor Kiss, Robert Patrick Reynolds, Jr., John W. Chu, Steven P. Rucker, James Richardson Lattner
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Patent number: 7740829Abstract: Synthesis gas is produced according to this invention using a combination of steam reforming and oxidation chemistry. The process incorporates the use of solids to heat the hydrocarbon feed, and to cool the gas product. According to the invention, heat can be conserved by directionally reversing the flow of feed and product gases at intermittent intervals.Type: GrantFiled: June 29, 2006Date of Patent: June 22, 2010Assignee: ExxonMobil Research & Engineering CompanyInventors: Christopher L. Becker, Frank Hershkowitz, James Richardson Lattner
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Publication number: 20100063338Abstract: Provided are processes for feeding ethylene into a polymerization system operating in a liquid phase or supercritical phase.Type: ApplicationFiled: September 3, 2009Publication date: March 11, 2010Inventors: GABOR KISS, ROBERT PATRICK REYNOLDS, JR., JOHN W. CHU, JAMES RICHARDSON LATTNER, GARY MOHR
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Publication number: 20090292085Abstract: Provided are methods of producing polymers with broadened molecular weight and/or composition distribution in a continuous homogeneous polymerization system utilizing reactor temperature gradients, reactor polymer concentration gradients, monomer concentration gradients, catalyst concentration gradients, and combinations thereof in the polymerization reactor. Such methods are particularly suitable when utilizing metallocene catalysts and other single-site catalysts, which generally produce polymers with narrow molecular weight and composition distribution.Type: ApplicationFiled: May 19, 2009Publication date: November 26, 2009Inventors: Gabor Kiss, Robert Patrick Reynolds, JR., John W. Chu, Patrick Brant, James Richardson Lattner
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Publication number: 20090259005Abstract: Monomer/solvent separation and recycle processes for continuous supercritical, solution and advanced solution polymerization processes for propylene-containing polymers and their blends are provided. The advantageous monomer/solvent separation and recycle process includes heating a polymer-lean recycle stream coming from a gravimetric separator positioned downstream of the reactor to form a heated polymer-lean recycle stream, and subsequently combining the heated polymer-lean recycle stream with the one or more homogenous reactor effluent streams to form a heated reactor effluent mixed stream. The heated reactor effluent mixed stream may then be passed through a pressure let-down valve followed and a gravimetric separator, such as to provide for reduced fouling propensity of the polymer-rich phase and sufficient heating of the polymer-rich phase to be able to pass through the remainder of the processing steps to form a propylene based polymer product without additional heat.Type: ApplicationFiled: April 3, 2009Publication date: October 15, 2009Inventors: Gabor Kiss, James Richardson Lattner
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Publication number: 20090163678Abstract: Provided are bulk homogeneous polymerization processes for producing ethylene propylene random copolymers. The process includes contacting in a reactor or in a series of reactors propylene monomer, ethylene comonomer with one or more catalyst systems and optional solvent (present at less than 40 wt %), wherein the reactor train is at a temperature of between 65° C. and 180° C.Type: ApplicationFiled: November 14, 2008Publication date: June 25, 2009Inventors: Gabor Kiss, Robert Patrick Reynolds, JR., John W. Chu, Steven P. Rucker, James Richardson Lattner
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Publication number: 20080281040Abstract: A monomer recycle process for fluid phase in-line blending of polymers is provided.Type: ApplicationFiled: March 4, 2008Publication date: November 13, 2008Inventors: Gabor Kiss, Alan Anthony Galuska, James Richardson Lattner
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Patent number: 7304197Abstract: A process and apparatus are provided for converting oxygenate to olefins which comprises: contacting a feedstock comprising oxygenate with a catalyst comprising a molecular sieve under conditions effective to produce a vaporous product comprising the olefins, water and unreacted oxygenate; condensing the vaporous product to provide a liquid stream rich in the water and unreacted oxygenate, and an olefins-rich vapor stream; introducing at least part of the liquid stream to a feed tray in a fractionation tower which provides an oxygenate-rich overhead product and a water-rich liquid bottoms product; providing a liquid, oxygenate-rich stream comprising at least about 20 wt % oxygenate above the feed tray; and passing the olefins-rich vapor stream through a recovery train to recover at least some of the olefins.Type: GrantFiled: November 24, 2003Date of Patent: December 4, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Keith H. Kuechler, Jeffrey L. Brinen, James Richardson Lattner, Allen Scott Gawlik
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Patent number: 7220341Abstract: This invention is to a process and system for controlling solids distribution in a gas-solids reactor. Solids distribution is controlled by controlling electrical charges between solid particles flowing between conductive surfaces within a gas-solids reactor. The electrical charges are controlled by conventional means such as by grounding the opposing conductive surfaces, or by applying a voltage to one of the opposing conductive surfaces.Type: GrantFiled: December 6, 2002Date of Patent: May 22, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jeffrey S. Smith, James Richardson Lattner, Kenneth R. Clem, Pete N. Loezos, Nicolas P. Coute, Rutton D. Patel
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Patent number: 7135604Abstract: The present invention is a process for removal of carbon dioxide from a reactor effluent stream comprising water, carbon dioxide and olefin(s), where a portion of the carbon dioxide is removed in a quenching step with a quench medium and more carbon dioxide is removed by contacting the quenched effluent stream with an alkaline stream. A portion of the alkaline stream is added to the quench medium.Type: GrantFiled: June 25, 2003Date of Patent: November 14, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Zhong Yi Ding, James Richardson Lattner, David Ritchie Lumgair, Jr., Jeffrey Alan Kabin
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Patent number: 7102049Abstract: The present invention is a process for producing olefin(s) from oxygenates that is more effective than previously known processes at removing carbon dioxide from the effluent stream by operating a quench tower at a pH greater than 7.0.Type: GrantFiled: June 25, 2003Date of Patent: September 5, 2006Assignee: ExxonMobil Chemical Patens Inc.Inventors: Zhong Yi Ding, James Richardson Lattner, David Ritchie Lumgair, Jr., Jeffrey Alan Kabin, Cor F. Van Egmond
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Patent number: 7060865Abstract: Disclosed is a process for removing DME from a stream containing C4 olefins. The process includes providing a first stream comprising C4 olefins, C5+ hydrocarbons, DME, and methanol. The first stream is separated into a second stream comprising the C4 olefins and the DME and a third stream comprising the C5+ hydrocarbons and the methanol. The second stream is directed to a DME absorption unit, wherein the second stream contacts water under conditions effective to separate the C4 olefins from the DME. Also disclosed is a process including contacting the first stream with water in a methanol removal unit under conditions effective to separate remove the methanol therefrom; distilling the methanol-depleted stream to remove C5+ hydrocarbon components, and contacting the stream with water in a DME removal unit under conditions effective to form an overhead stream comprising the C4 olefins and a bottoms stream comprising the DME.Type: GrantFiled: November 12, 2002Date of Patent: June 13, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Zhong Yi Ding, James Richardson Lattner
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Patent number: 7005555Abstract: The present invention is a process for producing olefin(s) from oxygenate(s). The process removes oxygenate(s) including carbon dioxide in the bottoms of the quench stream and recycles the oxygenate(s) back to the reactor. Carbon dioxide is removed from the quench bottoms before returning oxygenate(s) in the quench bottoms stream to the reactor.Type: GrantFiled: June 25, 2003Date of Patent: February 28, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Zhong Yi Ding, James Richardson Lattner, Paul N. Chisholm, Jeffrey Alan Kabin