Abstract: Provided in one embodiment is an improved and more flexible process for preparing a finished base oil or a white oil product comprising passing a dewaxed base oil product to a distillation column and separating the dewaxed base oil product into fuel and base oil product streams. The base oil product streams are tested to determine if they meet desired specifications. Base oil product streams that meet the desired minimum base oil specifications are passed to a hydrofinishing reactor to prepare a white oil product, or passed to direct sale.
Type:
Application
Filed:
December 24, 2021
Publication date:
March 7, 2024
Applicant:
CHEVRON U.S.A. INC.
Inventors:
Kenneth John PEINADO, Jay PAREKH, Jifei JIA, Yihua ZHANG, Guan-Dao Lei, Guang ZHANG
Abstract: Described are processes to produce base oils with one more improved properties, e.g., lower aromatics, economically and/or efficiently. In some embodiments, the processes relate to two stage (or more) hydrofinishing which advantageously provides base oils with lower aromatics than comparable one stage processes.
Type:
Application
Filed:
January 18, 2022
Publication date:
March 7, 2024
Applicant:
CHEVRON U.S.A. INC.
Inventors:
Yihua ZHANG, Subhasis BHATTACHARYA, Guan-Dao LEI
Abstract: Described herein is a process for hydroisomerising a hydrocarbon feed. The process may comprise: combining a hydrocarbon feed and a hydroisomerisation additive to provide a combined feed; and contacting the combined feed with a hydroisomerisation catalyst comprising zeolite SSZ-91, where the hydroisomerisation additive is a substituted or unsubstituted nitrogen heterocycle.
Type:
Application
Filed:
December 20, 2021
Publication date:
March 7, 2024
Applicant:
CHEVRON U.S.A. INC.
Inventors:
Yihua ZHANG, Guan-Dao LEI, Adeola Florence OJO
Abstract: Described are processes to produce base oils with one more improved properties, e.g., lower aromatics, economically and/or efficiently. In some embodiments the processes comprise a step that reduces the amount of residual refractory sulfur compounds prior to or simultaneous with a hydrofinishing step which advantageously provides base oils with lower aromatics than comparable processes.
Abstract: Provided in one embodiment is a continuous process for converting waste plastic into recycle for polyethylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene, and passing the waste plastics through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a pyrolysis oil and optionally pyrolysis wax comprising a naphtha/diesel fraction and heavy fraction, and char. The pyrolysis oil and wax is passed to a refinery FCC feed pretreater unit. A heavy fraction is recovered and sent to a refinery FCC unit, from which a C3 olefin/paraffin mixture fraction is recovered, which is passed to a steam cracker for ethylene production. In another embodiment, a propane fraction (C3) is recovered from a propane/propylene splitter and passed to the steam cracker.
Abstract: Differential equations defining physics of a reservoir are modeled as a neural network. Measured data for the reservoir is used as boundary condition to calculate the different equation parameters. The result is a neural ordinary differential equation network that models reservoir characteristics (e.g., inter-well connectivities, response times for injection wells and production wells) using physics that are encoded into the network. The neural ordinary differential equation network provides a solution for the reservoir that is constrained by the physics of the reservoir.
Type:
Grant
Filed:
March 31, 2021
Date of Patent:
March 5, 2024
Assignee:
Chevron U.S.A. Inc.
Inventors:
Larry A. Bowden, Jr., Lokendra Jain, Irina V. Prestwood
Abstract: A process involves (a) processing a lipid feedstock over a fluidized particulate catalyst in a gas-based stream in a fluid bed reactor to obtain a processed stream and spent catalyst comprising coke deposits, (b) continuously introducing the spent catalyst comprising the coke deposits to a catalyst regeneration unit, (c) continuously operating the catalyst regeneration unit to burn off the coke deposits from the spent catalyst to obtain a regenerated particulate catalyst, and (d) continuously introducing the regenerated particulate catalyst from the catalyst regeneration unit to the fluid bed reactor.
Abstract: Provided is a process for preparing base oil from a waxy hydrocarbon feedstock by contacting the hydrocarbon feedstock in a hydroisomerization zone under hydroisomerization conditions. The reaction is in the presence of hydrogen and an inert gas, with the total pressure in the hydroisomerization zone being at least 400 psig. A product from the hydroisomerization zone is collected and separated into base oil products and fuel products. The inert gas can comprise any suitable inert gas, but is generally nitrogen, methane or argon. Nitrogen is used in one embodiment.
Type:
Application
Filed:
December 24, 2021
Publication date:
February 22, 2024
Applicant:
CHEVRON U.S.A. INC.
Inventors:
Kenneth John PEINADO, Jifei JIA, Guan-Dao LEI, Jay PAREKH, Yihua ZHANG
Abstract: An improved hydroisomerization catalyst and process for making a base oil product wherein the catalyst comprises a base extrudate that includes SSZ-91 molecular sieve and a high nanopore volume alumina. The catalyst and process generally involves the use of a SSZ-91/high nanopore volume alumina based catalyst to produce dewaxed base oil products by contacting the catalyst with a hydrocarbon feedstock. The catalyst base extrudate advantageously comprises an alumina having a pore volume in the 11-20 nm pore diameter range of 0.05 to 1.0 cc/g, with the base extrudate formed from SSZ-91 and the alumina having a total pore volume in the 2-50 nm pore diameter range of 0.12 to 1.80 cc/g. The catalyst and process provide improved base oil yield with reduced gas and fuels production.
Type:
Application
Filed:
November 11, 2021
Publication date:
February 22, 2024
Applicant:
CHEVRON U.S.A. INC.
Inventors:
Yihua ZHANG, Adeola Florence OJO, Guan Dao LEI
Abstract: Provided is a process for hydrocracking normal paraffins into lighter normal paraffins with minimal formation of iso-paraffins. The process comprises hydrocracking a hydrocarbon feedstock comprising normal paraffins under hydrocracking conditions. The reaction is run in the presence of a specific type of zeolite based catalyst which has been found to provide high conversion with minimal iso-paraffin products. In one embodiment, the zeolite is of the framework PWO. The reaction conducted in the presence of the zeolite based catalyst produces an n-paraffin rich product that needs no separation step before being fed to a steam cracker to produce lower olefins.
Type:
Application
Filed:
December 29, 2021
Publication date:
February 22, 2024
Applicant:
CHEVRON U.S.A. INC.
Inventors:
Joel SCHMIDT, Cong-Yan CHEN, Theodorus Ludovicus Michael MAESEN, Dan XIE
Abstract: Disclosed are foam precursor compositions, foamed compositions, and methods of using these foamed compositions for the stimulation of unconventional reservoirs.
Type:
Grant
Filed:
July 7, 2020
Date of Patent:
February 20, 2024
Assignee:
CHEVRON U.S.A. INC.
Inventors:
Varadarajan Dwarakanath, Taimur Malik, Lin Zuo, Jimin Daniel Zhou, Nabijan Nizamidin, Gregory A. Winslow, Reza Banki, Mohamad Salman
Abstract: A method of monitoring renewable carbon in fuel streams in a refinery or blend facility while co-processing a bio-feedstock with a fossil feedstock or blending a renewable product with a fossil product wherein the method provides for quantification of renewable C14 carbon content to adjust the total renewable content to a targeted renewable content in situ while lowering the limit of detection.
Abstract: Provided in one embodiment is a continuous process for converting waste plastic into recycle for polyethylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene, and passing the waste plastics through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a pyrolysis oil and optionally wax comprising a naphtha/diesel and heavy fraction, and char. The pyrolysis oil and wax is passed to a refinery FCC unit from which a liquid petroleum gas C3-C5 olefin/paraffin mixture fraction is recovered. The liquid petroleum gas C3-C5 olefin/paraffin mixture fraction is passed to a refinery alkylation unit, with a propane and butane fraction recovered from the alkylation unit. The propane and butane fraction is then passed to a steam cracker for ethylene production.
Abstract: A deluge nozzle diversion apparatus can include a collection component having at least one wall that forms a collection cavity, where the collection component has a first end and a second end. The deluge nozzle diversion apparatus can also include an adjustable securing apparatus that is configured to secure the first end of the collection component to a deluge nozzle assembly of a deluge system when the adjustable securing apparatus is in a closed position. The deluge nozzle diversion apparatus can further include a diversion channel coupled to the second end of the collection component, where the diversion channel is adjustable and has a length sufficient to divert a fire protection fluid flowing therethrough to an alternative location. The collection cavity of the collection component can be configured to receive all of the fire protection fluid discharged from a deluge nozzle of the deluge system.
Type:
Grant
Filed:
February 4, 2021
Date of Patent:
February 13, 2024
Assignee:
Chevron U.S.A. Inc.
Inventors:
Elmer B. Revilla, Ifeanyi F. Oramulu, Bernard Weng-Keong Leong
Abstract: The present disclosure refers in one embodiment to processes for making and transporting clean hydrogen fuel. The processes may involve hydrotreating, hydrocracking, or both hydrotreating and hydrocracking an aromatic feedstock under conditions to obtain a liquid hydrocarbon fuel. The liquid hydrocarbon fuel is hydrogenated to obtain a hydrogen-rich fuel that is transported to a dehydrogenation facility that may also be at or near a hydrogen station. The hydrogen-rich fuel is used to obtain hydrogen and a second liquid hydrocarbon fuel.
Type:
Grant
Filed:
November 1, 2021
Date of Patent:
February 6, 2024
Assignee:
Chevron U.S.A. INC.
Inventors:
Bi-Zeng Zhan, Steven Xuqi Song, Trenton Otto, Yaofan Yi
Abstract: The thickness of subsurface layers if they had remained as they were prior to compaction may be estimated by restoring the volume of void space lost during compaction. Decompacted depths below seafloor, the depths the layers would be if compaction had not occurred, may be determined for the layers. A surrogate decompaction velocity may then be determined by dividing the decompacted depths by the travel times of acoustic waves that reflect off layers within the subsurface region. The decompaction velocity may be used in post-processing of acoustic data to produce a decompacted digital representation of the subsurface region. The decompacted digital representation may be used to directly interpret the thickness of layers prior to compaction, sedimentation rates over time, fault offsets, and other phenomena distorted by compaction.
Abstract: A fuel composition is described. The composition contains gasoline and an aryloxy alkylamine additive. The structure of the aryloxy alkylamine additive is given by where the aryloxy alkylamine additive is present in about 10 to about 750 ppm by weight based on total weight of the fuel composition. X is a hydrocarbyl group having 1 or 2 carbon atoms. R1 and R2 are independently hydrogen or substituted hydrocarbyl group having up to 36 carbon atoms.
Type:
Application
Filed:
September 15, 2021
Publication date:
January 25, 2024
Applicants:
CHEVRON ORONITE COMPANY LLC, CHEVRON U.S.A. INC.
Inventors:
Man Kit NG, Richard Eugene CHERPECK, Carrie Y. CHAN, Kriston George MENDENHALL, Andrew M. ICKES, Peter A. FUENTES-AFFLICK, Justin WANG
Abstract: Embodiments of the disclosure include swellable smart gel sealants and methods of using smart gel sealants. In certain embodiments, the smart gel sealants reversibly swell when exposed to a certain trigger, such as carbonic acid and/or sulfuric acid. In specific embodiments, the smart gel is comprised within a cement composition.
Type:
Grant
Filed:
August 2, 2022
Date of Patent:
January 23, 2024
Assignees:
CHEVRON U.S.A. INC., TRIAD NATIONAL SECURITY, LLC
Inventors:
Nathan James Welch, Hakim Boukhalfa, Robert David Gilbertson, Rajesh S. Nair, Deryck Edward Matthew Williams, Timothy Leo Quirk