Patents by Inventor Vijay R. Sampath
Vijay R. Sampath 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: 11499102Abstract: The present invention pertains to improved processes and catalysts for aromatization. The processes generally contacting a feed stream comprising a naphtha fraction having a C6 to C8 content with a catalyst pellet composition to form aromatic hydrocarbons. The catalyst pellet composition generally comprises a plurality of cylindrical pellets each pellet comprising a Group VIII metal on a zeolite. The pellets may have (a) a plurality of holes passing through the length of the cylindrical pellets, (b) a dome-shaped top and bottom, and (c) a plurality of semi-circular grooves along the length of the exterior of the cylinder.Type: GrantFiled: October 21, 2020Date of Patent: November 15, 2022Assignee: CHEVRON U.S.A. INCInventor: Vijay R. Sampath
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Patent number: 11491441Abstract: A method for scrubbing flue gas, comprising: providing a rotating packed bed device onboard a ship or an offshore floating vessel; mixing seawater with the flue gas under centrifugal force in the rotating packed bed device to prevent blow-by and produce a scrubbed flue gas having low sulfur; and discharging the scrubbed flue gas; wherein the scrubbed flue gas has less than half of the sulfur that was originally present in the flue gas before the mixing. Also, a system for scrubbing the flue gas according to the method described. Also, a marine ship, comprising: an engine that combusts HSFO; a rotating packed bed device, in a hull or funnel of the ship, comprising a rotating shaft and a porous material that mixes seawater with flue gas and reduces sulfur in the flue gas; and a connector from the engine and the rotating packed bed device.Type: GrantFiled: June 1, 2018Date of Patent: November 8, 2022Assignee: Chevron U.S.A. Inc.Inventors: Marcus Vinicius Dutra e Mello, Vijay R. Sampath, Steven Xugi Song
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Publication number: 20220325192Abstract: An improved process for making a base oil and for improving base oil yields by combining an atmospheric resid feedstock with a base oil feedstock and forming a base oil product via hydroprocessing. The process generally involves subjecting a base oil feedstream comprising the atmospheric resid to hydrocracking and dewaxing steps, and optionally to hydrofinishing, to produce a light and heavy grade base oil product. A process is also disclosed for making a base oil having a viscosity index of 120 or greater from a base oil feedstock having a viscosity index of about 100 or greater that includes a narrow cut-point range vacuum gas oil. The invention is useful to make Group II and/or Group III/III+ base oils, and, in particular, to increase the yield of a heavy base oil product relative to a light base oil product produced in the process.Type: ApplicationFiled: August 12, 2020Publication date: October 13, 2022Inventors: Minghui ZHANG, Horacio TREVINO, Guan-Dao LEI, Thomas Ralph FARRELL, Vijay R. SAMPATH
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Publication number: 20210115341Abstract: The present invention pertains to improved processes and catalysts for aromatization. The processes generally contacting a feed stream comprising a naphtha fraction having a C6 to C8 content with a catalyst pellet composition to form aromatic hydrocarbons. The catalyst pellet composition generally comprises a plurality of cylindrical pellets each pellet comprising a Group VIII metal on a zeolite. The pellets may have (a) a plurality of holes passing through the length of the cylindrical pellets, (b) a dome-shaped top and bottom, and (c) a plurality of semi-circular grooves along the length of the exterior of the cylinder.Type: ApplicationFiled: October 21, 2020Publication date: April 22, 2021Applicant: CHEVRON U.S.A. INC.Inventor: Vijay R. Sampath
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Publication number: 20190099706Abstract: An integrated system for onboard scrubbing of a marine exhaust gas on a ship, comprising: a) a Venturi quencher having: i) two liquid inlets that feed quench water to the Venturi quencher; and ii) a hot exhaust gas entry that feeds the hot marine exhaust gas from an engine on the ship; and b) the rotating packed bed device, having: iii) a stationary gas distributor, placed along an outer circumference of the RPB device, that disengages a quenched marine exhaust gas from a cooled two-phase mixture, and uniformly distributes the quenched marine exhaust gas along the outer circumference of the RPB device; and iv) a stationary liquid distributor, centrally positioned, and with multiple liquid rings that are fitted with spray nozzles that spray a seawater along an inner circumference of the RPB device. Also, processes for using the integrated system, and a ship comprising the integrated system.Type: ApplicationFiled: September 25, 2018Publication date: April 4, 2019Inventor: Vijay R. Sampath
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Publication number: 20180361312Abstract: A method for scrubbing flue gas, comprising: providing a rotating packed bed device onboard a ship or an offshore floating vessel; mixing seawater with the flue gas under centrifugal force in the rotating packed bed device to prevent blow-by and produce a scrubbed flue gas having low sulfur; and discharging the scrubbed flue gas; wherein the scrubbed flue gas has less than half of the sulfur that was originally present in the flue gas before the mixing. Also, a system for scrubbing the flue gas according to the method described. Also, a marine ship, comprising: an engine that combusts HSFO; a rotating packed bed device, in a hull or funnel of the ship, comprising a rotating shaft and a porous material that mixes seawater with flue gas and reduces sulfur in the flue gas; and a connector from the engine and the rotating packed bed device.Type: ApplicationFiled: June 1, 2018Publication date: December 20, 2018Inventors: Marcus Vinicius Dutra e Mello, Vijay R. Sampath, Steven Xugi Song
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Patent number: 5649281Abstract: A process is provided to react a feedstock comprising isobutane with pentenes in the presence of sulfuric acid catalyst to produce a high octane alkylate as well as a higher octane isopentane gasoline blending component. A method to reduce sulfuric acid consumption during alkylation is provided wherein a diolefinic contaminant of a pentene system feed is selectively hydrogenated before alkylation. An alkylation method is provided wherein the alkylation feed is separated into a fraction comprising substantially C.sub.4 and lower olefins and a fraction comprising substantially C.sub.5 olefins and the stream comprising C.sub.5 olefins is alkylated in a different reactor than the fraction comprising substantially C.sub.4 and lower olefins.Type: GrantFiled: July 17, 1995Date of Patent: July 15, 1997Assignee: Atlantic Richfield CompanyInventor: Vijay R. Sampath
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Patent number: 5648586Abstract: A process is provided to react a feedstock comprising isobutane with pentenes in the presence of sulfuric acid catalyst to produce a high octane alkylate as well as a higher octane isopentane gasoline blending component. A method to reduce sulfuric acid consumption during alkylation is provided wherein a diolefinic contaminant of a pentene system feed is selectively hydrogenated before alkylation. An alkylation method is provided wherein the alkylation feed is separated into a fraction comprising substantially C.sub.4 and lower olefins and a fraction comprising substantially C.sub.5 olefins and the stream comprising C.sub.5 olefins is alkylated in a different reactor than the fraction comprising substantially C.sub.4 and lower olefins.Type: GrantFiled: September 5, 1995Date of Patent: July 15, 1997Assignee: Atlantic Richfield CompanyInventor: Vijay R. Sampath
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Patent number: 5462719Abstract: A method and apparatus for mixing and distributing two reactants within a column. The apparatus forms a mixing zone in the column into which a first reactant (e.g. a process stream having both gas and liquid phases) flows vertically downward. The second reactant (e.g. quench gas) is introduced into the mixing zone and flows radially to intercept the downflowing process stream. Due to the construction of the mixing zone, a torturous path is provided which thoroughly mixes the different gas phases and the liquid phase by several different mechanisms, i.e. (a) radial jet mixing; (b) perpendicular mixing of the liquid and gas phases; (c) jet/turbulent mixing; (d) high velocity swirl jet mixing and atomizing of the liquid phase; (e) turbulent swirl mixing after the liquid is atomized; (f) additional turbulent jet mixing; and (g) energy dissipation of the flow as the mixed stream is distributed radially outward across the column through first a sieve tray and then a riser tray.Type: GrantFiled: June 8, 1994Date of Patent: October 31, 1995Assignee: Atlantic Richfield CompanyInventors: Michael J. Pedersen, Vijay R. Sampath, James F. Litchfield
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Patent number: 5350503Abstract: A consistent high quality coke is produced by feeding a balancing stream comprising hydrocarbons to a delayed coking drum in addition to the heavy hydrocarbonaceous coker feedstock. The process of this invention reduces the contaminant content of coke by coking contaminant-containing residua and a reduced contaminant hydrocarbon balancing stream. Preferably, the balancing stream is a contaminant diluent, such as unreduced crude. The balancing stream may be a crude which is different from the base crude processed in the refinery crude tower and is preferably selected as a sulfur and/or metals diluent having a lower concentration of sulfur-containing or metal-containing compounds than the heavy coker feedstock.Type: GrantFiled: July 29, 1992Date of Patent: September 27, 1994Assignee: Atlantic Richfield CompanyInventors: Douglas A. Freymeyer, Richard L. Holloway, Ronald J. Kiracofe, Vijay R. Sampath
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Patent number: 5326436Abstract: A method of feeding to a fractionator a feed mixture having a wide-boiling range vapor-liquid mixture is provided. Also, provided is a fractionator feed section adapted to receive a two phase feed mixture and has operational stability when fed a feed mixture which generates significant volume of vapor in the feed section.Type: GrantFiled: November 19, 1992Date of Patent: July 5, 1994Assignee: Atlantic Richfield CompanyInventors: Vijay R. Sampath, David E. Bachmann
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Patent number: 5252201Abstract: An improved fractionating process is provided wherein a liquid stream is withdrawn from the separation zone of the fractionator, is cooled and is recycled to the fractionator at a location below the location of withdrawal of the liquid stream. An improved fractionator is provided which comprises a withdrawal point from which a liquid stream is withdrawn, a cooler to cool the withdrawn stream and a means for recycling the withdrawn stream to a point below the withdrawal point.Type: GrantFiled: August 13, 1991Date of Patent: October 12, 1993Assignee: Atlantic Richfield CompanyInventor: Vijay R. Sampath
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Patent number: 5230839Abstract: A method of feeding to a fractionator a feed mixture comprising a wide-boiling range vapor-liquid mixture is provided. Also, provided is a fractionator feed section adapted to receive a two phase feed mixture. Furthermore, this invention provides a fractionator that has operational stability when fed a feed mixture which generates significant volume of vapor in the feed section. A feed nozzle (112) may introduce a mixed liquid and gas feed downwardly between converging baffles (102,104) into a mixing zone (110) above a seal pan (106), and trough means (114,116) may introduce liquid reflux to the mixing zone.Type: GrantFiled: August 15, 1991Date of Patent: July 27, 1993Assignee: Atlantic Richfield CompanyInventors: Vijay R. Sampath, David E. Bachmann