Patents Assigned to Chevron U.S.A. Inc.
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Patent number: 11964875Abstract: A method is provided for synthesizing *MRE molecular sieves using an organic structure directing agent which comprises a 1-ethylpyridinium cation.Type: GrantFiled: March 24, 2022Date of Patent: April 23, 2024Assignee: CHEVRON U.S.A. INC.Inventors: Dan Xie, Kurt Owen Jensen, Adeola Florence Ojo
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Patent number: 11964926Abstract: A process for producing high octane alkylate is provided. The process involves reacting isobutane and ethylene using an ionic liquid catalyst. Reaction conditions can be chosen to assist in attaining, or to optimize, desirable alkylate yields and/or properties.Type: GrantFiled: September 28, 2022Date of Patent: April 23, 2024Assignee: CHEVRON U.S.A. INC.Inventors: Bong-Kyu Chang, Hye-Kyung Cho Timken, Huping Luo
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Publication number: 20240123433Abstract: 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 selected catalyst, e.g., an LTA-type zeolite, with a requisite topology and acid site density. The zeolite has a framework type with voids greater than 0.50 nm in diameter, which are accessible through apertures characterized by a longest diameter of less than 0.50 nm and a shortest diameter of more than 0.30 nm. The reaction conducted in the presence of such a selected zeolite produces an n-paraffin rich product.Type: ApplicationFiled: December 29, 2021Publication date: April 18, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Cong-Yan CHEN, Theodorus Ludovicus Michael MAESEN, Tracy Margaret DAVIS, Dan XIE
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Patent number: 11959025Abstract: A continuous process for converting waste plastic into recycle for polypropylene polymerization is provided. The process integrates refinery operations to provide an effective and efficient recycle process. The process comprises selecting waste plastics containing polyethylene and polypropylene and then 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 naphtha/diesel fraction, a heavy fraction, and char. The naphtha/diesel fraction is passed to a refinery FCC unit, from which is recovered a liquid petroleum gas C3 olefin/paraffin mixture. The C3 paraffins and C3 olefins are separated into different fractions with a propane/propylene splitter. The C3 olefin fraction is passed to a propylene polymerization reactor.Type: GrantFiled: October 30, 2022Date of Patent: April 16, 2024Assignee: CHEVRON U.S.A INC.Inventor: Hye-Kyung Timken
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Publication number: 20240117256Abstract: An improved process for making a heavy base oil from a base oil feedstream comprising an atmospheric resid feedstock, and, optionally, a base oil feedstock, 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 base oil product(s) including a heavy grade base oil product having a viscosity of at least about 12.7 cSt at 100° C. The invention is useful to make heavy grade base oil products, as well as Group II and/or Group III/III+ base oils.Type: ApplicationFiled: January 26, 2022Publication date: April 11, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Horacio TREVINO, Minghui ZHANG, Guan-Dao LEI, Luyen T. VO
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Patent number: 11951458Abstract: Bulk catalysts comprised of nickel, molybdenum, tungsten and titanium and methods for synthesizing bulk catalysts are provided. The catalysts are useful for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.Type: GrantFiled: June 29, 2023Date of Patent: April 9, 2024Assignee: Chevron U.S.A. Inc.Inventors: Xiaoying Ouyang, Viorel Duma, Alexander Kuperman, Ibrahim Uckung, Theodorus Ludovicus Michael Maesen, Axel Brait, Charles Wilson
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Publication number: 20240110120Abstract: A method for making a base oil having enhanced color stability and the base oil prepared therefrom are disclosed. The method comprises adding a phenyl benzotriazole compound to a base oil composition to form a color-stabilized base oil composition. In some cases, the phenyl benzotriazole compound has the structural formula (I): wherein, R and R? are independently one or more substituents selected from hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted cycloalkyl, substituted and unsubstituted alkoxy, substituted and unsubstituted carboxyl, or a combination thereof, with the proviso that at least one of R and R? is a non-hydrogen substituent.Type: ApplicationFiled: January 18, 2022Publication date: April 4, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Yihua ZHANG, Guan-Dao LEI, Malek M. ROSTAMI, Beth A. RUSSELL
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Publication number: 20240101912Abstract: An improved hydroisomerization catalyst and process for making a base oil product using a catalyst comprising SSZ-91 molecular sieve and ZSM-12 molecular sieve. The catalyst and process generally involves the use of a catalyst comprising an SSZ-91 molecular sieve combined with a ZSM-12 molecular sieve to produce dewaxed base oil products by contacting the catalyst with a hydrocarbon feedstock. The catalyst and process provide improved base oil cold properties, such as pour point and cloud point, along with other beneficial base oil properties.Type: ApplicationFiled: November 22, 2021Publication date: March 28, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Yihua ZHANG, Adeola OJO, Guan-Dao LEI
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Publication number: 20240101913Abstract: Provided is a hydrocracking process with a recycle loop for converting a petroleum feed to lower boiling products, which process comprises reacting a stream over a non-zeolite noble metal catalyst at a temperature of about 650° F. (343° C.) or less in a reactor positioned in the recycle loop of the hydrocracking reactor.Type: ApplicationFiled: December 29, 2021Publication date: March 28, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Ling JIAO, Bi-Zheng ZHAN, Don BUSHEE, Theodorus Ludovicus Michael MAESEN, Hye-Kyung TIMKEN, Richard DUTTA, Jay PAREKH
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Publication number: 20240100513Abstract: A method for making a hydroisomerization catalyst having improved thermal stability and metal dispersion characteristics, the catalyst prepared therefrom, and a process for making a base oil product using the catalyst are disclosed. The catalyst is prepared from a composition comprising an SSZ-91 molecular sieve and a rare earth modified alumina, with the composition being modified to contain a Group 8-10 metal, typically through impregnation of a Group 8-10 metal composition. The catalyst may be used to produce dewaxed base oil products by contacting the catalyst under hydroisomerization conditions with a hydrocarbon feedstock.Type: ApplicationFiled: December 20, 2021Publication date: March 28, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Yihua ZHANG, Adeola OJO, Guan-Dao LEI
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Patent number: 11939524Abstract: Disclosed are compositions and methods for the pressure protection of existing wells during infill drilling operations.Type: GrantFiled: August 19, 2022Date of Patent: March 26, 2024Assignee: CHEVRON U.S.A. INC.Inventors: Samiha Said Elsayed Morsy, Nabijan Nizamidin, Taimur Malik, Mohsen S. Tagavifar
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Patent number: 11939537Abstract: An improved reforming process for producing aromatic hydrocarbons is disclosed. The process includes two reformers arranged in parallel flow configuration, with the first reformer being a conventional reformer comprising a catalyst selective for reforming C8+ hydrocarbons to a reformate and the second reformer comprising a catalyst selective for reforming C7? hydrocarbons to a reformate. In certain embodiments, the first reformer catalyst comprises a conventional alumina catalyst and the second reformer catalyst comprises a ZSM-5 catalyst.Type: GrantFiled: April 21, 2020Date of Patent: March 26, 2024Assignee: Chevron U.S.A. Inc.Inventors: Cong-Yan Chen, Emmanuel Behraz
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Patent number: 11939527Abstract: 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.Type: GrantFiled: October 30, 2022Date of Patent: March 26, 2024Assignee: Chevron U.S.A. Inc.Inventors: Hye-Kyung Timken, Cameron McCord
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Publication number: 20240091750Abstract: A novel synthetic crystalline molecular sieve material, designated boron SSZ-41 is provided. The boron SSZ-41 is a boronzincosilicate molecular sieve having the framework structure of SSZ-41. It can be synthesized using 1,1?-(1,4-butanediyl)bis[4-aza-1-azoniabicyclo[2.2.2]octane] dications as a structure directing agent. The boronzincosilicate SSZ-41 may be used in organic compound conversion reactions and/or sorptive processes.Type: ApplicationFiled: August 30, 2023Publication date: March 21, 2024Applicant: Chevron U.S.A. Inc.Inventors: Stacey I. ZONES, Cong-Yan CHEN
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Patent number: 11932547Abstract: An organotemplate-free synthetic process for synthesizing an aluminosilicate molecular sieve SSZ-122 is provided. The process includes (1) preparing a reaction mixture comprising: (a) a silicon atom source; (b) an aluminum atom source; (c) a source of an alkali metal [M]; (d) a source of hydroxide ions; (e) water; and (f) seed crystals; and (2) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the aluminosilicate molecular sieve.Type: GrantFiled: March 10, 2022Date of Patent: March 19, 2024Assignee: CHEVRON U.S.A. INC.Inventor: Dan Xie
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Publication number: 20240084204Abstract: An improved process for making a bright stock base oil from a base oil feedstream comprising an atmospheric resid feedstock, and, optionally, a base oil feedstock, 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 base oil product(s) including a bright stock grade base oil product having a viscosity of at least about 22 cSt at 100° C. The invention is useful to make heavy grade base oil products such as bright stock, as well as Group II and/or Group III/III+ base oils.Type: ApplicationFiled: January 26, 2022Publication date: March 14, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Horacio TREVINO, Minghui ZHANG, Guan-Dao LEI, Thomas Ralph FARRELL
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Publication number: 20240084205Abstract: Described herein is a hydrocracking catalyst and process that may be used to make middle distillates and unconverted oil having beneficial yield and product characteristics. The process generally comprises contacting a hydrocarbon feed with the hydrocracking catalyst under hydrocracking conditions to produce a product comprising middle distillates and unconverted oil products. The hydrocracking catalyst comprises an SSZ-91 molecular sieve and a modifying metal selected from one or more Group 6 metals, and, optionally, one or more Group 8 to 10 metals, or a modifying metal selected from Group 8 to 10 metals and combinations thereof, and, optionally, one or more Group 6 metals. The hydrocracking catalyst may comprise a matrix material and/or an additional zeolite.Type: ApplicationFiled: January 17, 2022Publication date: March 14, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Viorel DUMA, Theodorus Ludovicus Michael MAESEN, Hyungjae Alexander YOON
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Patent number: 11928565Abstract: Methods and systems for building and maintaining model(s) of a physical process are disclosed. One method includes receiving training data associated with a plurality of different data sources, and performing a clustering process to form one or more clusters. For each of the one or more clusters, the method includes building a data model based on the training data associated with the data sources in the cluster, automatically performing a data cleansing process on operational data based on the data model, and automatically updating the data model based on updated training data that is received as operational data. For data sources excluded from the clusters, automatic building, data cleansing, and updating of models can also be applied.Type: GrantFiled: October 24, 2022Date of Patent: March 12, 2024Assignee: Chevron U.S.A. Inc.Inventors: Yining Dong, Alisha Deshpande, Yingying Zheng, Lisa Ann Brenskelle, Si-Zhao Qin
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Publication number: 20240076563Abstract: 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: ApplicationFiled: December 24, 2021Publication date: March 7, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Kenneth John PEINADO, Jay PAREKH, Jifei JIA, Yihua ZHANG, Guan-Dao Lei, Guang ZHANG
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Publication number: 20240076564Abstract: 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: ApplicationFiled: January 18, 2022Publication date: March 7, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Yihua ZHANG, Subhasis BHATTACHARYA, Guan-Dao LEI