Patents by Inventor Jifei Jia
Jifei Jia 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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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: 20240059987Abstract: 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: ApplicationFiled: December 24, 2021Publication date: February 22, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Kenneth John PEINADO, Jifei JIA, Guan-Dao LEI, Jay PAREKH, Yihua ZHANG
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Publication number: 20240059985Abstract: A supported catalyst for hydroprocessing, hydrotreating or hydrocracking hydrocarbon feedstocks, the supported catalyst comprising at least one metal from Group 6 and at least one metal from Groups 8, 9, or 10 of the Periodic Table of the Elements, and optionally comprising phosphorous. The Group 6 metal comprises about 30 to about 45 wt. % and the total of Group 6 and Group 8, 9, or 10 or mixtures thereof metal components comprise about 35 to about 55 wt. %, calculated as oxides and based on the total weight of the catalyst composition. The metals, and phosphorous when present, are carried on and/or within a porous inorganic oxide carrier or support, the support prior to incorporation of the metals and phosphorus, having a total pore volume (TPV) of about 0.8 cc/g to about 1.5 cc/g and comprising a defined pore size distribution and wherein the supported catalyst comprises a defined pore size distribution.Type: ApplicationFiled: January 5, 2022Publication date: February 22, 2024Inventors: Jifei Jia, Bi-Zeng Zhan, Michael Manto
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Patent number: 11873455Abstract: 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: GrantFiled: December 30, 2020Date of Patent: January 16, 2024Assignee: Chevron U.S.A. Inc.Inventors: Kenny Peinado, Jifei Jia, Guan-Dao Lei, Jay Parekh, Yihua Zhang
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Publication number: 20230272291Abstract: Provided is a novel catalyst for use in the second stage of a two-stage hydrocracking process. The present process comprises hydrocracking a hydrocarbon feed in a first stage. The catalyst in the first stage is a conventional hydrocracking catalyst. The product from the first stage can then be transferred to a second hydrocracking stage. The catalyst used in the second stage of the present hydrocracking process comprises a base impregnated with metals from Group 6 and Groups 8 through 10 of the Periodic Table, and an organic acid. The base of the catalyst used in the present second hydrocracking stage comprises alumina, an amorphous silica-alumina (ASA) material, and a USY zeolite. Improved naphtha production is achieved.Type: ApplicationFiled: July 23, 2021Publication date: August 31, 2023Inventors: Jifei JIA, Bi-Zeng ZHAN, Wai Seung William LOUIE, Arun ARORA, Jay PAREKH
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Publication number: 20230226533Abstract: The process comprises hydrocracking a hydrocarbon feed in a single stage. The catalyst comprises a base impregnated with metals from Group 6 and Groups 8 through 10 of the Periodic Table, as well as citric acid. The base of the catalyst used in the present hydrocracking process comprises alumina, an amorphous silica-alumina (ASA) material, a USY zeolite, and a beta zeolite.Type: ApplicationFiled: June 15, 2021Publication date: July 20, 2023Inventors: Jifei JIA, Bi-Zeng ZHAN, Theodorus Ludovicus Michael MAESEN
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Patent number: 11642664Abstract: Alumina support compositions comprising at least 0.1 wt % of silica are disclosed. The alumina support are characterized by a pore volume of greater than 0.60 cc/g, a median pore size ranging from about 70 to about 120, a pore size distribution such that at least 90% of the total pore volume falls within the range of about 20 to about 250, and a pore size distribution width of no less than about 40. Alumina compositions of the present invention exhibit a primary peak mode at a pore diameter less than the median pore diameter. Also provided are catalysts made from the alumina supports, and processes of preparing and using the supports and catalysts.Type: GrantFiled: August 3, 2021Date of Patent: May 9, 2023Assignee: Advanced Refining Technologies LLCInventors: Xianghua Yu, Bruno Nesci, Roberto Romero, Gill M. Malick, Jifei Jia, Cecelia A. Radlowski
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Publication number: 20230001383Abstract: A silica-alumina based composite material for making hydroprocessing catalysts, is disclosed. The silica-alumina composite material generally comprises at least two silica-aluminas, the first being a modified first silica-alumina, and the second being a second silica-alumina that is unmodified or modified. The first silica-alumina is modified to comprise silica and alumina domains and a silica-alumina interphase. The second silica-alumina may also be modified at the same time or separately to comprise silica and alumina domains and a silica-alumina interphase. The first silica-alumina and the second silica-alumina differ in one or more physical and/or chemical characteristics, e.g., the ratio of silica to alumina, surface area, pore size, pore volume, silica domain size, or alumina domain size. The invention can be used for making catalyst base materials and catalysts useful for upgrading hydrocarbon feedstocks to produce fuels, lubricants, chemicals and other hydrocarbonaceous compositions.Type: ApplicationFiled: November 4, 2020Publication date: January 5, 2023Inventors: Ann LIANG, Trenton J. OTTO, Jifei JIA, Ling JIAO, Bao Q. LE, Kaustav CHAUDHURI, Bi-Zeng ZHAN
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Patent number: 11441085Abstract: 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: GrantFiled: December 30, 2020Date of Patent: September 13, 2022Assignee: Chevron U.S.A. Inc.Inventors: Kenny Peinado, Jay Parekh, Jifei Jia, Yihua Zhang, Guan-Dao Lei, Guang Zhang
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Patent number: 11396631Abstract: A process for preparing a base oil from a waxy hydrocarbon feedstock is provided. The process comprises passing the hydrocarbon feedstock to a distillation column prior to dewaxing in order to recover a heavy wax cut. The heavy wax is then hydrocracked to lower boiling compounds which can be better isomerized to a base oil with an acceptable cloud point. The base oil yield is also increased.Type: GrantFiled: December 30, 2020Date of Patent: July 26, 2022Assignee: Chevron U.S.A. Inc.Inventors: Jay Parekh, Jifei Jia, Guan-Dao Lei, Kenny Peinado, Yihua Zhang, Shanying Lee
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Publication number: 20220204874Abstract: 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 30, 2020Publication date: June 30, 2022Applicant: Chevron U.S.A. Inc.Inventors: Kenny Peinado, Jay Parekh, Jifei Jia, Yihua Zhang, Guan-Dao Lei, Guang Zhang
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Publication number: 20220204876Abstract: 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: ApplicationFiled: December 30, 2020Publication date: June 30, 2022Applicant: Chevron U.S.A. Inc.Inventors: Kenny Peinado, Jifei Jia, Guan-Dao Lei, Jay Parekh, Yihua Zhang
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Publication number: 20220204875Abstract: A process for preparing a base oil from a waxy hydrocarbon feedstock is provided. The process comprises passing the hydrocarbon feedstock to a distillation column prior to dewaxing in order to recover a heavy wax cut. The heavy wax is then hydrocracked to lower boiling compounds which can be better isomerized to a base oil with an acceptable cloud point. The base oil yield is also increased.Type: ApplicationFiled: December 30, 2020Publication date: June 30, 2022Applicant: Chevron U.S.A. Inc.Inventors: Jay Parekh, Jifei Jia, Guan-Dao Lei, Kenny Peinado, Yihua Zhang, Shanying Lee
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Publication number: 20210362137Abstract: Alumina support compositions comprising at least 0.1 wt % of silica are disclosed. The alumina support are characterized by a pore volume of greater than 0.60 cc/g, a median pore size ranging from about 70 to about 120, a pore size distribution such that at least 90% of the total pore volume falls within the range of about 20 to about 250, and a pore size distribution width of no less than about 40. Alumina compositions of the present invention exhibit a primary peak mode at a pore diameter less than the median pore diameter. Also provided are catalysts made from the alumina supports, and processes of preparing and using the supports and catalysts.Type: ApplicationFiled: August 3, 2021Publication date: November 25, 2021Applicant: Advanced Refining Technologies LLCInventors: Xianghua Yu, Bruno Nesci, Roberto Romero, Gill M. Malick, Jifei Jia, Cecelia A. Radlowski
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Patent number: 11090638Abstract: Alumina support compositions comprising at least 0.1 wt % of silica are disclosed. The alumina support are characterized by a pore volume of greater than 0.60 cc/g, a median pore size ranging from about 70 to about 120, a pore size distribution such that at least 90% of the total pore volume falls within the range of about 20 to about 250, and a pore size distribution width of no less than about 40. Alumina compositions of the present invention exhibit a primary peak mode at a pore diameter less than the median pore diameter. Also provided are catalysts made from the alumina supports, and processes of preparing and using the supports and catalysts.Type: GrantFiled: November 20, 2012Date of Patent: August 17, 2021Assignee: Advanced Refining Technologies LLCInventors: Xianghua Yu, Bruno C. Nesci, Roberto Romero, Gill M. Malick, Jifei Jia, Cecelia A. Radlowski
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Patent number: 10376873Abstract: This disclosure relates to supported multi-metallic catalysts for use in the hydrotreating of hydrocarbon feeds, as well as a method for preparing such catalysts. The catalysts are prepared from a catalyst precursor comprised of at least one Group VIB metal, at least one Group VIII metal and an organic acid. The catalyst precursor is thermally treated to partially decompose the organic acid, then sulfided. The catalysts have a high carbon-as-carboxyl to total carbon ratio (Ccarboxy/Ctotal) as a result of a unique post-metal calcination method employed during the manufacture of the catalyst.Type: GrantFiled: April 24, 2014Date of Patent: August 13, 2019Assignee: Advanced Refining Technologies LLCInventors: Xianghua Yu, Shuguang Zhang, Gill M. Malick, Bruno Nesci, Henry Saternus, Jifei Jia, Cecelia Radlowski, Theodorus Ludovicus Michael Maesen, Colleen T. Miedona
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Patent number: 10369558Abstract: This disclosure relates to supported multi-metallic catalysts for use in the hydrotreating of hydrocarbon feeds, as well as a method for preparing such catalysts. The catalysts are prepared from a catalyst precursor comprised of at least one Group VIB metal, at least one Group VIII metal and an organic acid. The catalyst precursor is thermally treated to partially decompose the organic acid, then sulfided. The catalysts have a high carbon-as-carboxyl to total carbon ratio (Ccarboxy/Ctotal) as a result of a unique post-metal calcination method employed during the manufacture of the catalyst. As a result, the hydrotreating catalysts have lower percent weight loss-on-ignition, higher activity and longer catalyst life.Type: GrantFiled: April 24, 2014Date of Patent: August 6, 2019Assignee: Advanced Refining Technologies LLCInventors: Xianghua Yu, Shuguang Zhang, Gill M. Malick, Bruno Nesci, Henry Saternus, Jifei Jia, Cecelia A. Radlowski, Theodorus Ludovicus Michael Maesen, Colleen T. Miedona
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Patent number: 10370600Abstract: This disclosure relates to supported multi-metallic catalysts for use in the hydrotreating of hydrocarbon feeds. The catalysts are prepared from a catalyst precursor comprised of at least one Group VIB metal, at least one Group VIII metal and an organic acid. The catalyst precursor is thermally treated to partially decompose the organic acid, then sulfided. The catalysts have a high carbon-as-carboxyl to total carbon ratio (Ccarboxy/Ctotal) as a result of a unique post-metal calcination method employed during the manufacture of the catalyst.Type: GrantFiled: April 24, 2014Date of Patent: August 6, 2019Assignee: Advanced Refining Technologies LLCInventors: Xianghua Yu, Shuguang Zhang, Gill M. Malick, Bruno Nesci, Henry Saternus, Jifei Jia, Cecelia A. Radlowski, Theodorus Ludovicus Michael Maesen, Colleen T. Miedona
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Publication number: 20190105640Abstract: A second-stage hydrocracking catalyst is provided, comprising: a) a zeolite beta having an OD acidity of 20 to 400 ?mol/g and an average domain size from 800 to 1500 nm2; b) a zeolite USY having an ASDI between 0.05 and 0.12; c) a catalyst support; and d) 0.1 to 10 wt % noble metal; wherein the second-stage hydrocracking catalyst provides a hydrogen consumption less than 350 SCFB across a range of synthetic conversions up to 37 wt % when used to hydrocrack hydrocarbonaceous feeds having an initial boiling point greater than 380° F. (193° C.). A second-stage hydrocracking process using the second-stage hydrocracking process is provided. A method to make the second-stage hydrocracking catalyst is also provided.Type: ApplicationFiled: December 5, 2018Publication date: April 11, 2019Inventors: Jifei Jia, Andrew Rainis, Theodorus Ludovicus Michael Maesen, Richard Joseph Coser, Yihua Zhang, Thomas Michael Rea
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Patent number: 10183282Abstract: A second-stage hydrocracking catalyst is provided comprising: a. from 40 wt % to 70 wt % of a zeolite USY having an ASDI from 0.05 to 0.18; b. an amorphous silica alumina; c. a second alumina; and d. 0.1 to 10 wt % noble metal; wherein the second-stage hydrocracking catalyst has a BET surface area from 450 to 650 m2/g. A second-stage hydrocracking process is provided comprising using the second-stage hydrocracking catalyst to produce middle distillate. A method for making the second-stage hydrocracking catalyst is also provided.Type: GrantFiled: January 22, 2015Date of Patent: January 22, 2019Assignee: Chevron U.S.A. Inc.Inventors: Jifei Jia, Andrew Rainis, Theodorus Ludovicus Michael Maesen, Richard Coser, Yihua Zhang