Patents by Inventor Richard A. Demmin
Richard A. Demmin 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: 11118120Abstract: A method of upgrading refining streams with high polynucleararomatic hydrocarbon (PNA) concentrations can include: hydrocracking a PNA feed in the presence of a catalyst and hydrogen at 380° C. to 430° C., 2500 psig or greater, and 0.1 hr?1 to 5 hr?1 liquid hourly space velocity (LSHV), wherein the weight ratio of PNA feed to hydrogen is 30:1 to 10:1, wherein the PNA feed comprises 25 wt % or less of hydrocarbons having a boiling point of 700° F. (371° C.) or less and having an aromatic content of 50 wt % or greater to form a product comprising 50 wt % or greater of the hydrocarbons having a boiling point of 700° F. (371° C.) or less and having an aromatic content of 20 wt % or less.Type: GrantFiled: December 9, 2019Date of Patent: September 14, 2021Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Stephen H. Brown, Samia Ilias, Randolph J. Smiley, Richard Demmin, Shifang Luo, Brenda A. Raich, Aldrin G. Cuevas, Keith Wilson, Jesse R. McManus, Lei Zhang
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Patent number: 10947460Abstract: Systems and methods are provided for producing upgraded raffinate and extract products from lubricant boiling range feeds and/or other feeds having a boiling range of 400° F. (204° C.) to 1500° F. (816° C.) or more. The upgraded raffinate and/or extract products can have a reduced or minimized concentration of sulfur, nitrogen, metals, or a combination thereof. The reduced or minimized concentration of sulfur, nitrogen, and/or metals can be achieved by hydrotreating a suitable feed under hydrotreatment conditions corresponding to relatively low levels of feed conversion. Optionally, the feed can also dewaxed, such as by catalytic dewaxing or by solvent dewaxing. Because excessive aromatic saturation is not desired, the pressure for hydrotreatment (and optional dewaxing) can be 500 psig (˜3.4 MPa) to 1200 psig (˜8.2 MPa).Type: GrantFiled: September 11, 2019Date of Patent: March 16, 2021Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Benjamin S. Umansky, Keith K. Aldous, James W. Gleeson, Edward J. Blok, Richard A. Demmin
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Publication number: 20200199464Abstract: Systems and methods are provided for producing naphthenic compositions corresponding to various types of products, such as naphthenic base oil, specialty industrial oils, and/or hydrocarbon fluids. The methods of producing the naphthenic compositions can include exposing a heavy fraction from a fluid catalytic cracking (FCC) process, such as a FCC bottoms fraction (i.e., a catalytic slurry oil), to hydroprocessing conditions corresponding to hydrotreating and/or aromatic saturation conditions. Naphthenic compositions formed from processing of FCC fractions are also provided.Type: ApplicationFiled: December 10, 2019Publication date: June 25, 2020Inventors: Shifang Luo, Lei Zhang, Samia Ilias, Richard A. Demmin, Mark A. Deimund, Stephen H. Brown, Randolph J. Smiley, Larry E. Hoch, Daniel Bien, Shiwen Li
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Publication number: 20200181509Abstract: A method of upgrading refining streams with high polynucleararomatic hydrocarbon (PNA) concentrations can include: hydrocracking a PNA feed in the presence of a catalyst and hydrogen at 380° C. to 430° C., 2500 psig or greater, and 0.1 hr?1 to 5 hr?1 liquid hourly space velocity (LSHV), wherein the weight ratio of PNA feed to hydrogen is 30:1 to 10:1, wherein the PNA feed comprises 25 wt % or less of hydrocarbons having a boiling point of 700° F. (371° C.) or less and having an aromatic content of 50 wt % or greater to form a product comprising 50 wt % or greater of the hydrocarbons having a boiling point of 700° F. (371° C.) or less and having an aromatic content of 20 wt % or less.Type: ApplicationFiled: December 9, 2019Publication date: June 11, 2020Inventors: Stephen H. Brown, Samia Ilias, Randolph J. Smiley, Richard Demmin, Shifang Luo, Brenda A. Raich, Aldrin G. Cuevas, Keith Wilson, Jesse R. McManus, Lei Zhang
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Publication number: 20200002625Abstract: Systems and methods are provided for producing upgraded raffinate and extract products from lubricant boiling range feeds and/or other feeds having a boiling range of 400° F. (204° C.) to 1500° F. (816° C.) or more. The upgraded raffinate and/or extract products can have a reduced or minimized concentration of sulfur, nitrogen, metals, or a combination thereof. The reduced or minimized concentration of sulfur, nitrogen, and/or metals can be achieved by hydrotreating a suitable feed under hydrotreatment conditions corresponding to relatively low levels of feed conversion. Optionally, the feed can also dewaxed, such as by catalytic dewaxing or by solvent dewaxing. Because excessive aromatic saturation is not desired, the pressure for hydrotreatment (and optional dewaxing) can be 500 psig (˜3.4 MPa) to 1200 psig (˜8.2 MPa).Type: ApplicationFiled: September 11, 2019Publication date: January 2, 2020Inventors: Benjamin S. Umansky, Keith K. Aldous, James W. Gleeson, Edward J. Blok, Richard A. Demmin
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Patent number: 10450517Abstract: Systems and methods are provided for producing upgraded raffinate and extract products from lubricant boiling range feeds and/or other feeds having a boiling range of 400° F. (204° C.) to 1500° F. (816° C.) or more. The upgraded raffinate and/or extract products can have a reduced or minimized concentration of sulfur, nitrogen, metals, or a combination thereof. The reduced or minimized concentration of sulfur, nitrogen, and/or metals can be achieved by hydrotreating a suitable feed under hydrotreatment conditions corresponding to relatively low levels of feed conversion. Optionally, the feed can also dewaxed, such as by catalytic dewaxing or by solvent dewaxing. Because excessive aromatic saturation is not desired, the pressure for hydrotreatment (and optional dewaxing) can be 500 psig (˜3.4 MPa) to 1200 psig (˜8.2 MPa).Type: GrantFiled: May 19, 2017Date of Patent: October 22, 2019Assignee: ExxonMobil Research and Engineering CompanyInventors: Benjamin S. Umansky, Keith K. Aldous, James W. Gleeson, Edward J. Blok, Richard A. Demmin
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Publication number: 20170342330Abstract: Systems and methods are provided for producing upgraded raffinate and extract products from lubricant boiling range feeds and/or other feeds having a boiling range of 400° F. (204° C.) to 1500° F. (816° C.) or more. The upgraded raffinate and/or extract products can have a reduced or minimized concentration of sulfur, nitrogen, metals, or a combination thereof. The reduced or minimized concentration of sulfur, nitrogen, and/or metals can be achieved by hydrotreating a suitable feed under hydrotreatment conditions corresponding to relatively low levels of feed conversion. Optionally, the feed can also dewaxed, such as by catalytic dewaxing or by solvent dewaxing. Because excessive aromatic saturation is not desired, the pressure for hydrotreatment (and optional dewaxing) can be 500 psig (˜3.4 MPa) to 1200 psig (˜8.2 MPa).Type: ApplicationFiled: May 19, 2017Publication date: November 30, 2017Inventors: Benjamin S. Umansky, Keith K. Aldous, James W. Gleeson, Edward J. Blok, Richard A. Demmin
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Patent number: 9809764Abstract: A process for producing high yields of higher quality (API Group II, Group III?) lubricating oil basestock fractions which allows the production of two or more types of high quality lubes in continuous mode (no blocked operation mode) without transition times and feed or intermediate product tankage segregation. Two consecutive hydroprocessing steps are used: the first step processes a wide cut feed at a severity needed to match heavy oil lube properties. The second step hydroprocesses a light oil after fractionation of the liquid product from the first step at a severity higher than for the heavy oil fraction. The two hydroprocessing steps will normally be carried out in separate reactors but they may be combined in a single reactor which allows for the two fractions to be processed with different degrees of severity.Type: GrantFiled: March 10, 2016Date of Patent: November 7, 2017Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Benjamin S. Umansky, Teck-Mui Hoo, Richard A. Demmin, Fengrong Chen, James W. Gleeson, Suisheng M. Dou, Tomas R. Melli, Michael C. Clark
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Publication number: 20160298038Abstract: A process for producing high yields of higher quality (API Group II, Group III?) lubricating oil basestock fractions which allows the production of two or more types of high quality lubes in continuous mode (no blocked operation mode) without transition times and feed or intermediate product tankage segregation. Two consecutive hydroprocessing steps are used: the first step processes a wide cut feed at a severity needed to match heavy oil lube properties. The second step hydroprocesses a light oil after fractionation of the liquid product from the first step at a severity higher than for the heavy oil fraction. The two hydroprocessing steps will normally be carried out in separate reactors but they may be combined in a single reactor which allows for the two fractions to be processed with different degrees of severity.Type: ApplicationFiled: March 10, 2016Publication date: October 13, 2016Inventors: Benjamin S. Umansky, Teck-Mui Hoo, Richard A. Demmin, Fengrong Chen, James W. Gleeson, Suisheng M. Dou, Tomas R. Melli, Michael C. Clark
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Patent number: 8999142Abstract: Fuels hydrocracking can be used to generate a variety of product slates. Varying the temperature can allow an amount of naphtha product and an amount of unconverted product to be varied. The method can be enabled by a hydrocracking catalyst that includes a combination of metals with activity for hydrodesulfurization.Type: GrantFiled: June 11, 2012Date of Patent: April 7, 2015Assignee: Exxonmobil Research and Engineering CompanyInventors: David L. Vannauker, Richard A. Demmin
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Publication number: 20140174988Abstract: Methods are provided for producing low sulfur diesel fuels by performing multi-stage hydroprocessing at low pressure on a distillate feed. A feedstock suitable for forming a diesel fuel product is hydrotreated at a hydrogen partial pressure of 500 psig or less in at least two reaction stages. In order to provide improved desulfurization and/or aromatic saturation activity in the final stage, the stages are configured so that the highest hydrogen pressure and/or highest hydrogen purity are delivered to the last hydrotreatment stage.Type: ApplicationFiled: November 21, 2013Publication date: June 26, 2014Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Richard A. Demmin, Michael A. Hayes, Kenneth M. Lee
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Publication number: 20120318712Abstract: Fuels hydrocracking can be used to generate a variety of product slates. Varying the temperature can allow an amount of naphtha product and an amount of unconverted product to be varied. The method can be enabled by a hydrocracking catalyst that includes a combination of metals with activity for hydrodesulfurization.Type: ApplicationFiled: June 11, 2012Publication date: December 20, 2012Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: David L. Vannauker, Richard A. Demmin
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Patent number: 7513989Abstract: The invention relates to a hydrocracking process for hydrocracking petroleum and chemical feedstocks using bulk Group VIII/VIB catalysts. Preferred catalysts include those comprised of Ni—Mo—W.Type: GrantFiled: January 14, 2000Date of Patent: April 7, 2009Assignee: ExxonMobil Research and Engineering CompanyInventors: Stuart Leon Soled, Kenneth Lloyd Riley, Gary P. Schleicher, Richard A. Demmin, Darlene Schuette, legal representative, Ian Alfred Cody, William L. Schuette
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Patent number: 7422679Abstract: Naphtha hydrodesulfurization selectivity is increased by reducing the amount of COX (CO plus ½ CO2) in the hydrodesulfurization reaction zone to less than 100 vppm. While this is useful for non-selective hydrodesulfurization, it is particularly useful for selectively desulfurizing an olefin-containing naphtha without octane loss due to olefin saturation by hydrogenation. The COX reduction is achieved by removing COX from the treat gas before it is passed into the reaction zone.Type: GrantFiled: May 1, 2003Date of Patent: September 9, 2008Assignee: ExxonMobil Research and Engineering CompanyInventors: Edward S. Ellis, Thomas R. Halbert, Garland B. Brignac, John P. Greeley, Richard A. Demmin, Theresa A. Lalain
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Patent number: 7297251Abstract: A process for the selective hydrodesulfurization of naphtha streams containing a substantial amount of olefins and organically bound sulfur. The naphtha stream is selectively hydrodesulfurized by passing it through a first reaction zone containing a bed of a first hydrodesulfurization catalyst, then passing the resulting product stream through a second reaction zone containing a bed of a second hydrodesulfurization catalyst, which second hydrodesulfurization catalyst contains a lower level of catalytic metals than the first hydrodesulfurization catalyst.Type: GrantFiled: April 28, 2003Date of Patent: November 20, 2007Assignee: Exxonmobil Research and Engineering CompanyInventors: Edward S. Ellis, Richard A. Demmin, John P. Greeley, Gary B. McVicker, Bruce R. Cook, Garland B. Brignac, Thomas R. Halbert
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Publication number: 20040026298Abstract: A process for the selective hydrodesulfurization of naphtha streams containing a substantial amount of olefins and organically bound sulfur. The naphtha stream is selectively hydrodesulfurized by passing it through a first reaction zone containing a bed of a first hydrodesulfurization catalyst, then passing the resulting product stream through a second reaction zone containing a bed of a second hydrodesulfurization catalyst, which second hydrodesulfurization catalyst contains a lower level of catalytic metals than the first hydrodesulfurization catalyst.Type: ApplicationFiled: April 28, 2003Publication date: February 12, 2004Inventors: Edward S. Ellis, Richard A. Demmin, John P. Greeley, Gary B. McVicker, Bruce R. Cook, Garland B. Brignac, Thomas R. Halbert
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Publication number: 20030221994Abstract: Naphtha hydrodesulfurization selectivity is increased by reducing the amount of COX (CO plus ½ CO2) in the hydrodesulfurization reaction zone to less than 100 vppm. While this is useful for non-selective hydrodesulfurization, it is particularly useful for selectively desulfurizing an olefin-containing naphtha without octane loss due to olefin saturation by hydrogenation. The COX reduction is achieved by removing COX from the treat gas before it is passed into the reaction zone.Type: ApplicationFiled: May 1, 2003Publication date: December 4, 2003Inventors: Edward S. Ellis, Thomas R. Halbert, Garland B. Brignac, John P. Greeley, Richard A. Demmin, Theresa A. Lalain
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Patent number: 6387249Abstract: The invention relates to naphtha hydrodesulfurization incorporating either high temperature depressurization or controlled heating for mercaptan removal. More particularly, the invention relates to a naphtha hydrodesulfurization process, wherein the hot naphtha exiting the desulfurization reactor contains mercaptans, most of which are removed without olefin loss, by depressurizing the hot naphtha, thermally treating the hot naphtha, or some combination thereof. The desulfurized naphtha may be cooled and condensed to a liquid, separated from the gaseous H2S, stripped and sent to a mogas pool.Type: GrantFiled: October 10, 2000Date of Patent: May 14, 2002Assignee: ExxonMobil Research and Engineering CompanyInventors: Bruce R. Cook, Richard H. Ernst, Richard A. Demmin, John P. Greeley
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Patent number: 6322692Abstract: A process for producing a lubricating oil basestock having at least 90 wt. % saturates and a VI of at least 105 by selectively hydroconverting a raffinate from a solvent extraction zone in a two step hydroconversion zone followed by a hydrofinishing zone, and a lubricating oil basestock produced by said process.Type: GrantFiled: March 21, 2000Date of Patent: November 27, 2001Assignee: ExxonMobil Research and Engineering CompanyInventors: Ian A. Cody, Douglas R. Boate, Sandra J. Linek, William J. Murphy, John E. Gallagher, Alberto Ravella, Richard A. Demmin
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Patent number: 6231753Abstract: Selective and deep desulfurization of a high sulfur content mogas naphtha, with reduced product mercaptans and olefin loss, is achieved by a two stage, vapor phase hydrodesulfurization process with interstage separation of at least 80 vol. % of the H2S formed in the first stage from the first stage, partially desulfurized naphtha vapor effluent fed into the second stage. At least 70 wt. % of the sulfur is removed in the first stage and at least 80 wt. % of the remaining sulfur is removed in the second stage, to achieve a total at least 95 wt. % feed desulfurization, with no more than a 60 vol. % feed olefin loss. The second stage temperature and space velocity are preferably greater than in the first. The hydrodesulfurization catalyst preferably contains a low metal loading of Co and Mo metal catalytic components on an alumina support.Type: GrantFiled: November 24, 1999Date of Patent: May 15, 2001Assignee: Exxon Research and Engineering CompanyInventors: Craig A. McKnight, Thomas R. Halbert, John P. Greeley, Garland B. Brignac, Richard A. Demmin, William E. Winter, Jr., Bruce R. Cook