Patents by Inventor Tahmid I. Mizan
Tahmid I. Mizan 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: 8992770Abstract: Methods are provided for characterizing crude oils, crude fractions, or other potential feedstocks for forming lubricating base oils in order to determine the suitability of a feedstock for lubricating base oil production. One type of characterization is to determine the isoparaffin, naphthene, and/or aromatics contents of the distillate portion of a feedstock. A second characterization is to determine the viscosity index of a distillate portion of a feedstock after dewaxing the distillate portion to a target pour point.Type: GrantFiled: March 15, 2013Date of Patent: March 31, 2015Assignee: ExxonMobil Research and Engineering CompanyInventors: Liezhong Gong, Corry S. Powers, Helen S. Wellons, Tahmid I. Mizan, Eric D. Joseck, Steven Webster Levine
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Patent number: 8822744Abstract: Processes are provided for producing a diesel fuel product having a sulfur content of 10 ppm by weight or less from feed sources that include up to 10% by weight of a biocomponent feedstock. The mineral hydrocarbon portions of the feed sources can be distillate or heavier feed sources.Type: GrantFiled: December 20, 2007Date of Patent: September 2, 2014Assignee: ExxonMobil Research and Engineering CompanyInventors: Tahmid I. Mizan, Zhiguo Hou, William E. Lewis
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Patent number: 8814986Abstract: A protected solid adsorbent is disclosed that includes a solid adsorbent substrate and a surface layer at least partially coating the solid adsorbent substrate, the surface layer being generally permeable to an active agent. Additionally, a process for protecting a solid adsorbent and an adsorption system that includes a vessel containing the protected solid adsorbent is provided.Type: GrantFiled: July 1, 2013Date of Patent: August 26, 2014Assignee: ExxonMobil Research and Egineering CompanyInventors: Mohsen S Yeganeh, Bhupender S. Minhas, Tahmid I Mizan, Sufang Zhao, Richard W. Flynn
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Patent number: 8609429Abstract: Methods for determining the fouling propensity of a hydrocarbon stream and for reducing fouling are provided. In one method, the fouling propensity of a hydrocarbon stream is determined by obtaining a parameter value indicative of the fouling propensity at no less than two different temperatures, and an activation energy of fouling by the hydrocarbon stream is derived therefrom. In another method, the thus obtained parameter value at no less than two different temperatures and the activation energy are used to select proper heating fluids and operating temperature and to determine whether to add an antifoulant to the hydrocarbon stream to reduce fouling at a given temperature.Type: GrantFiled: November 17, 2011Date of Patent: December 17, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Teh C. Ho, Glen B. Brons, Limin Song, Tahmid I. Mizan
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Publication number: 20130288883Abstract: A protected solid adsorbent is disclosed that includes a solid adsorbent substrate and a surface layer at least partially coating the solid adsorbent substrate, the surface layer being generally permeable to an active agent. Additionally, a process for protecting a solid adsorbent and an adsorption system that includes a vessel containing the protected solid adsorbent is provided.Type: ApplicationFiled: July 1, 2013Publication date: October 31, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Mohsen S. YEGANEH, Bhupender S. MINHAS, Tahmid I. MIZAN, Sufang ZHAO, Richard W. FLYNN
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Patent number: 8555642Abstract: A method of utilizing waste heat to create a pressurized working fluid is disclosed. The method includes providing a vessel containing a sorbent system, introducing a feed of waste heat to a heat exchanger external to the vessel to heat a feed of working fluid, introducing the heated working fluid from the heat exchanger to the vessel to obtain pressurized working fluid, and directing the pressurized working fluid from the vessel to a work component. The method is particularly suited to make use of waste heat an industrial process, (e.g., a chemical processing or petrochemical refining operation) in which low grade heat source(s) are used to drive the sorption system.Type: GrantFiled: February 24, 2011Date of Patent: October 15, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Bhupender S. Minhas, Sufang Zhao, Mohsen S. Yeganeh, Tahmid I. Mizan
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Patent number: 8500887Abstract: The present application provides a protected solid adsorbent that includes a solid adsorbent substrate and a surface layer at least partially coating the solid adsorbent substrate, the surface layer being generally permeable to an active agent. Additionally, a process for protecting a solid adsorbent and an adsorption system that includes a vessel containing the protected solid adsorbent is provided.Type: GrantFiled: February 25, 2011Date of Patent: August 6, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Mohsen S. Yeganeh, Bhupender S. Minhas, Sufang Zhao, Tahmid I. Mizan, Richard W. Flynn
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Publication number: 20120122230Abstract: Methods for determining the fouling propensity of a hydrocarbon stream and for reducing fouling are provided. In one method, the fouling propensity of a hydrocarbon stream is determined by obtaining a parameter value indicative of the fouling propensity at no less than two different temperatures, and an activation energy of fouling by the hydrocarbon stream is derived therefrom. In another method, the thus obtained parameter value at no less than two different temperatures and the activation energy are used to select proper heating fluids and operating temperature and to determine whether to add an antifoulant to the hydrocarbon stream to reduce fouling at a given temperature.Type: ApplicationFiled: November 17, 2011Publication date: May 17, 2012Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Teh C. HO, Glen B. BRONS, Limin SONG, Tahmid I. MIZAN
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Publication number: 20120053377Abstract: Processes for producing diesel fuel having sulfur content of 10 ppm by weight or less from feed sources including up to 20% by weight of a biocomponent feedstock. The process includes hydrotreating the feed sources in a first reaction zone under hydrotreating conditions, separating the first hydrotreated stream effluent from gas components and hydrotreating the first hydrotreated stream effluent in a second reaction zone under hydrotreating conditions. The mineral hydrocarbon of the feed sources can be distillate or heavier feed sources.Type: ApplicationFiled: December 20, 2007Publication date: March 1, 2012Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Tahmid I Mizan, Zhiguo Hou, William E. Lewis
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Publication number: 20110232305Abstract: The present application provides a sorption system for generating power and chilling that includes at least one absorber to absorb a working fluid in a liquid sorbent, a pump in fluid communication with the absorber to yield a feed of pressurized liquid sorbent and absorbed working fluid, a heat source to heat the feed of pressurized liquid sorbent and absorbed working fluid to yield a feed of working fluid at a supercritical state, a generator in fluid communication with the feed of working fluid at a supercritical state to yield power and a feed of working fluid in an at least partially condensed state, and an evaporator in fluid communication with the feed of working fluid in the at least partially condensed state to yield chilling and uncondensed working fluid. Additional systems and method for the generating power and chilling are provided.Type: ApplicationFiled: March 17, 2011Publication date: September 29, 2011Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Bhupender S. MINHAS, Tahmid I. MIZAN, Sufang ZHAO
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Publication number: 20110232493Abstract: The present application provides a protected solid adsorbent that includes a solid adsorbent substrate and a surface layer at least partially coating the solid adsorbent substrate, the surface layer being generally permeable to an active agent. Additionally, a process for protecting a solid adsorbent and an adsorption system that includes a vessel containing the protected solid adsorbent is provided.Type: ApplicationFiled: February 25, 2011Publication date: September 29, 2011Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Mohsen S. YEGANEH, Bhupender S. MINHAS, Sufang ZHAO, Tahmid I. MIZAN, Richard W. FLYNN
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Publication number: 20110219770Abstract: A method of utilizing waste heat to create a pressurized working fluid is disclosed. The method includes providing a vessel containing a sorbent system, introducing a feed of waste heat to a heat exchanger external to the vessel to heat a feed of working fluid, introducing the heated working fluid from the heat exchanger to the vessel to obtain pressurized working fluid, and directing the pressurized working fluid from the vessel to a work component. The method is particularly suited to make use of waste heat an industrial process, (e.g., a chemical processing or petrochemical refining operation) in which low grade heat source(s) are used to drive the sorption system.Type: ApplicationFiled: February 24, 2011Publication date: September 15, 2011Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Bhupender S. MINHAS, Sufang ZHAO, Mohsen S. YEGANEH, Tahmid I. MIZAN
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Publication number: 20110219802Abstract: The present invention relates to process modifications and apparatus designs that are conducive towards minimizing temperature swings (?T) useful to yield operating pressures that provide work and/or refrigeration (e.g., electricity and/or refrigeration) in sorption systems. Such process modifications and designs are particularly suited to make use of waste heat an industrial process, (e.g., a chemical processing or petrochemical refining operation) in which low grade heat source(s) are used to drive the sorption system.Type: ApplicationFiled: February 24, 2011Publication date: September 15, 2011Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Bhupender S. MINHAS, Sufang ZHAO, Mohsen S. YEGANEH, Tahmid I. MIZAN
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Patent number: 7959795Abstract: The distillate catalytic hydrodesulfurization of hydrocarbon fuels wherein the optimum hydrogen treat gas rate to maximize desulfurization is determined and introduced into the reaction zone to maintain a controlled amount of hydrogen at the surface of the catalyst during hydrodesulfurization.Type: GrantFiled: July 22, 2008Date of Patent: June 14, 2011Assignee: ExxonMobil Research and Engineering CompanyInventors: Teh C. Ho, Garland B. Brignac, Zhiguo Hou, Michael C. Kerby, Tahmid I. Mizan, William E. Lewis
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Publication number: 20100170830Abstract: This invention relates to reactors with mitigation of fouling-related pressure buildup, the reactors having a reactor bed containing at least one catalyst layer through which reactants flow. The mitigation of fouling which occurs at the top of the reactor bed is accomplished by using at least one blowback ring located near the top of the reactor bed.Type: ApplicationFiled: March 16, 2010Publication date: July 8, 2010Inventors: Tahmid I. Mizan, Ramesh Gupta
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Publication number: 20100018905Abstract: The distillate catalytic hydrodesulfurization of hydrocarbon fuels wherein the optimum hydrogen treat gas rate to maximize desulfurization is determined and introduced into the reaction zone to maintain a controlled amount of hydrogen at the surface of the catalyst during hydrodesulfurization.Type: ApplicationFiled: July 22, 2008Publication date: January 28, 2010Inventors: Teh C. Ho, Garland B. Brignac, Zhiguo Hou, Michael C. Kerby, Tahmid I. Mizan, William E. Lewis