Patents by Inventor Teh C. Ho
Teh C. Ho 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: 10400184Abstract: Heavy oil feeds are hydroprocessed in the presence of a solvent and in the presence of a catalyst with a median pore size of about 85 ? to about 120 ? under conditions that provide a variety of benefits. The solvent can be an added solvent or a portion of the liquid effluent from hydroprocessing. The processes allow for lower pressure processing of heavy oil feeds for extended processing times or extended catalyst lifetimes be reducing or mitigating the amount of coke formation on the hydroprocessing catalyst.Type: GrantFiled: August 29, 2012Date of Patent: September 3, 2019Assignee: ExxonMobil Research and Engineering CompanyInventors: Hyung Suk Woo, Jane Chi-Ya Cheng, Teh C. Ho, Stephen Harold Brown
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Patent number: 9404847Abstract: 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 indicative of the fouling propensity by a regression of a series of temperature measurements data for the hydrocarbon stream exiting a test unit. In another method, an effective minimal amount of an antifoulant is added to a hydrocarbon stream to reduce fouling, where the amount of the antifoulant is determined based on the fouling propensity of the hydrocarbon stream.Type: GrantFiled: November 11, 2011Date of Patent: August 2, 2016Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Teh C. Ho, Glen B. Brons
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Patent number: 9333497Abstract: The behavior of a monitored condition over time for a reactor or reaction system can be analyzed using groupings or windows of data to identify anomalous features in the time-average values. Anomalous features can be identified based on a threshold value generated from the analysis. Based on identification of an anomalous feature, a corrective action can be taken. For example, when the monitored condition is the pressure drop across a catalyst bed, detection of an anomaly can indicate the time to initiate a wash process for the catalyst bed before a large drop in catalyst activity occurs. By detecting an anomaly at an earlier point in time, a wash cycle can be initiated earlier so that the wash is more effective at restoring the catalyst bed to a desired condition.Type: GrantFiled: February 28, 2014Date of Patent: May 10, 2016Assignee: ExxonMobil Research and Engineering CompanyInventors: Teh C. Ho, Krishnan Kumaran, Richard C. Dougherty
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Patent number: 9206363Abstract: Heavy oil feeds are hydroprocessed in the presence of a solvent under conditions that provide a variety of benefits. The solvent can be an added solvent or a portion of the liquid effluent from hydroprocessing. The processes allow for lower pressure processing of heavy oil feeds for extended processing times or extended catalyst lifetimes be reducing or mitigating the amount of coke formation on the hydroprocessing catalyst.Type: GrantFiled: August 29, 2012Date of Patent: December 8, 2015Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Hyung Suk Woo, Jane Chi-ya Cheng, Teh C. Ho, Stephen Harold Brown, Richard Charles Dougherty, David Thomas Ferrughelli, Federico Barrai
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Patent number: 8864980Abstract: A process for hydrotreating a first aromatics- and sulfur-containing hydrocarbon feed using a fresh supported CoMo catalyst, includes treating the fresh catalyst under first hydrotreating conditions with a second hydrocarbon feed having a lower aromatics content than the first feed.Type: GrantFiled: February 21, 2011Date of Patent: October 21, 2014Assignee: ExxonMobil Research and Engineering CompanyInventors: Gabor Kiss, Iulian Nistor, John Zengel, Sabato Miseo, Roman Krycak, Teh C. Ho
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Publication number: 20140296057Abstract: The behavior of a monitored condition over time for a reactor or reaction system can be analyzed using groupings or windows of data to identify anomalous features in the time-average values. Anomalous features can be identified based on a threshold value generated from the analysis. Based on identification of an anomalous feature, a corrective action can be taken. For example, when the monitored condition is the pressure drop across a catalyst bed, detection of an anomaly can indicate the time to initiate a wash process for the catalyst bed before a large drop in catalyst activity occurs. By detecting an anomaly at an earlier point in time, a wash cycle can be initiated earlier so that the wash is more effective at restoring the catalyst bed to a desired condition.Type: ApplicationFiled: February 28, 2014Publication date: October 2, 2014Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Teh C. Ho, Krishnan Kumaran, Richard C. Dougherty
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Patent number: 8741129Abstract: This invention is directed to a process for producing a hydroprocessed product. The invention is particularly advantageous in that substantially less hydrogen is absorbed during the process relative to conventional hydroprocessing methods. This benefit is achieved by using a particular solvent as a co-feed component. In particular, the solvent component contains at least one single ring aromatic compound and has a relatively low boiling point range compared to the heavy hydrocarbon oil component used as another co-feed component.Type: GrantFiled: August 29, 2012Date of Patent: June 3, 2014Assignee: ExxonMobil Research and Engineering CompanyInventors: Stephen Harold Brown, Teh C. Ho, Jane Chi-Ya Cheng, Hyung Suk Woo
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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: 20130161237Abstract: Heavy oil feeds are hydroprocessed in the presence of a solvent under conditions that provide a variety of benefits. The solvent can be an added solvent or a portion of the liquid effluent from hydroprocessing. The processes allow for lower pressure processing of heavy oil feeds for extended processing times or extended catalyst lifetimes be reducing or mitigating the amount of coke formation on the hydroprocessing catalyst.Type: ApplicationFiled: August 29, 2012Publication date: June 27, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Hyung Suk Woo, Jane Chi-ya Cheng, Teh C. Ho, Stephen Harold Brown, Richard Charles Dougherty, David Thomas Ferrughelli, Federico Barrai
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Patent number: 8444850Abstract: The present invention relates to a catalytic process for removing organonitrogen species from hydrocarbon mixtures such as refinery process feedstreams. More particularly, this invention relates to a new operating and catalyst loading strategies based on organonitrogen concentration, composition, and structure.Type: GrantFiled: August 13, 2010Date of Patent: May 21, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Teh C. Ho, Stuart L. Soled, Kuangnan Qian, Stephen J. McCarthy, Andrew C. Moreland
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Publication number: 20130081978Abstract: This invention is directed to a process for producing a hydroprocessed product. The invention is particularly advantageous in that substantially less hydrogen is absorbed during the process relative to conventional hydroprocessing methods. This benefit is achieved by using a particular solvent as a co-feed component. In particular, the solvent component contains at least one single ring aromatic compound and has a relatively low boiling point range compared to the heavy hydrocarbon oil component used as another co-feed component.Type: ApplicationFiled: August 29, 2012Publication date: April 4, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Stephen Harold Brown, Teh C. Ho, Jane Chi-ya Cheng, Hyung Suk Woo
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Publication number: 20130081977Abstract: Heavy oil feeds are hydroprocessed in the presence of a solvent and in the presence of a catalyst with a median pore size of about 85 ? to about 120 ? under conditions that provide a variety of benefits. The solvent can be an added solvent or a portion of the liquid effluent from hydroprocessing. The processes allow for lower pressure processing of heavy oil feeds for extended processing times or extended catalyst lifetimes be reducing or mitigating the amount of coke formation on the hydroprocessing catalyst.Type: ApplicationFiled: August 29, 2012Publication date: April 4, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Hyung Suk Woo, Jane Chi-ya Cheng, Teh C. Ho, Stephen Harold Brown
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Publication number: 20130081979Abstract: This invention is directed to a process for producing a hydroprocessed product. The invention is particularly advantageous in that substantially longer run length can be attained relative to conventional hydroprocessing methods. This benefit is achieved by using a particular solvent as a co-feed component. In particular, the solvent component is comprised of at least one or more supercritical solvent compounds.Type: ApplicationFiled: August 29, 2012Publication date: April 4, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Stephen Harold Brown, Teh C. Ho, Jane Chi-ya Cheng, Hyung Suk Woo
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Publication number: 20130006029Abstract: A process for hydrotreating a first aromatics- and sulfur-containing hydrocarbon feed using a fresh supported CoMo catalyst, includes treating the fresh catalyst under first hydrotreating conditions with a second hydrocarbon feed having a lower aromatics content than the first feed.Type: ApplicationFiled: February 21, 2011Publication date: January 3, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERINGCOMPANYInventors: Gabor Kiss, Iulian Nistor, John Zengel, Sabato Miseo, Roman Krycak, Teh C. Ho
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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: 20120118794Abstract: 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 indicative of the fouling propensity by a regression of a series of temperature measurements data for the hydrocarbon stream exiting a test unit. In another method, an effective minimal amount of an antifoulant is added to a hydrocarbon stream to reduce fouling, where the amount of the antifoulant is determined based on the fouling propensity of the hydrocarbon stream.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: ExxonMobil Research and Engineering CompanyInventors: Teh C. HO, Glen B. BRONS
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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: 20110036755Abstract: The present invention relates to a catalytic process for removing organonitrogen species from hydrocarbon mixtures such as refinery process feedstreams. More particularly, this invention relates to a new operating and catalyst loading strategies based on organonitrogen concentration, composition, and structure.Type: ApplicationFiled: August 13, 2010Publication date: February 17, 2011Applicant: ExxonMobil Research and Engineering CompanyInventors: Teh C. Ho, Stuart L. Soled, Kuangnan Qian, Stephen J. McCarthy, Andrew C. Moreland
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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
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Patent number: 6783662Abstract: A cavitation enhanced atomizing process comprises forming a flowing solution of the liquid to be atomized and a lower boiling cavitating liquid. This flowing solution is then contacted with a pressure reducing means, at a temperature below the bubble point of the cavitating liquid in the solution, to produce cavitation bubbles. These bubbles comprise cavitation liquid vapor and the bubble nucleation produces a two-phase fluid of the bubbles and liquid solution. The two-phase fluid is passed downstream into and through an atomizing means, such as an orifice, and into a lower pressure atomizing zone, in which the bubbles vaporize to form a spray of liquid droplets. The nucleated bubbles also grow in size as the so-formed two-phase fluid passes downstream to and through the atomizing means.Type: GrantFiled: October 17, 2002Date of Patent: August 31, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Dean C. Draemel, Nicholas C. Nahas, Teh C. Ho