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公开(公告)号：US20210189254A1
公开(公告)日：2021-06-24
申请号：US17131894
申请日：2020-12-23
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
IPC: C10G1/10 , C10G1/00 , C10G11/18 , C07C4/06 , C08F10/06 , C10G45/58 , C10M177/00 , C10M109/02 , C10B53/07
Abstract: 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. The C3 paraffin fraction is optionally passed to a dehydrogenation unit to produce additional propylene and then the resulting C3 olefin is passed to a propylene polymerization reactor. The heavy fraction of pyrolyzed oil is passed to an isomerization dewaxing unit to produce a lubricating base oil.
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22.发明授权公开(公告)号：US10435491B2
公开(公告)日：2019-10-08
申请号：US14829987
申请日：2015-08-19
Applicant: Chevron Phillips Chemical Company LP , Chevron U.S.A. Inc.
Inventor： Steven M. Bischof , Robert C. Coffin , Kenneth D. Hope , Michael S. Driver , Hye-Kyung Timken
Abstract: Disclosed herein are embodiments of a process which generally includes contacting i) a monomer or mixture of monomers, ii) a haloaluminate ionic liquid, and iii) one or more halide components in a reaction zone, and oligomerizing the monomer or mixture of monomers in the reaction zone to form an oligomer product. The combination of the haloaluminate ionic liquid and halide component can constitute a catalyst system which is used in embodiments of the process to produce the oligomer product.
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公开(公告)号：US09802186B2
公开(公告)日：2017-10-31
申请号：US15010236
申请日：2016-01-29
Applicant: Chevron U.S.A. Inc.
Inventor： Huping Luo , Michael John Girgis , Hye-Kyung Timken
CPC classification number: B01J31/40 , B01J31/0288 , B01J31/0298
Abstract: We provide a segmented reactor for regenerating a spent acidic ionic liquid via hydrogenation and hydrocracking, comprising: no solid hydrogenation catalyst; a gas inlet for feeding a gas feed comprising a hydrogen; a liquid inlet for feeding a spent acidic ionic liquid; partitions along an axis of the reactor that create segments, wherein each segment functions as a bubble column reactor; and an outlet from which a regenerated acidic ionic liquid flow out of the segmented reactor. We also provide a process for regenerating a spent acidic ionic liquid, comprising contacting the spent acidic ionic liquid with hydrogen and without an addition of a solid hydrogenation catalyst in the segmented reactor.
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公开(公告)号：US12215036B2
公开(公告)日：2025-02-04
申请号：US18344530
申请日：2023-06-29
Applicant: Chevron U.S.A. Inc.
Inventor： Kandaswamy Jothimurugesan , Hye-Kyung Timken
Abstract: A process of making a silica-alumina composition having improved properties is provided. The process includes (a) mixing an aqueous solution of a silicon compound and an aqueous solution of an aluminum compound and an acid, while maintaining a pH of the mixed solution in a range of 1 to 3, and obtaining an acidified silica-alumina sol; (b) adding an aqueous solution of a base precipitating agent to the acidified silica-alumina sol to a final pH in a range of 5 to 8, and co-precipitating a silica-alumina slurry, wherein the base precipitating agent is selected from ammonium carbonate, ammonium bicarbonate, and any combination thereof; (c) optionally, hydrothermally aging the silica-alumina slurry to form a hydrothermally aged silica-alumina slurry; and (d) recovering a precipitate solid from the silica-alumina slurry or the hydrothermally aged silica-alumina slurry, wherein the precipitate solid comprises the silica-alumina composition.
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公开(公告)号：US11787701B2
公开(公告)日：2023-10-17
申请号：US17382441
申请日：2021-07-22
Applicant: CHEVRON U.S.A. INC.
Inventor： Kandaswamy Jothimurugesan , Hye-Kyung Timken
CPC classification number: C01F7/34 , B01J21/12 , B01J35/1019 , B01J35/1047 , B01J35/1061 , B01J37/031 , B01J37/04 , C01P2002/72 , C01P2006/12 , C01P2006/14 , C01P2006/16
Abstract: A process of making a silica-alumina composition having improved properties is provided. The process includes (a) mixing an aqueous solution of a silicon compound and an aqueous solution of an aluminum compound and an acid, while maintaining a pH of the mixed solution in a range of 1 to 3, and obtaining an acidified silica-alumina sol; (b) adding an aqueous solution of a base precipitating agent to the acidified silica-alumina sol to a final pH in a range of 5 to 8, and co-precipitating a silica-alumina slurry, wherein the base precipitating agent is selected from ammonium carbonate, ammonium bicarbonate, and any combination thereof; (c) optionally, hydrothermally aging the silica-alumina slurry to form a hydrothermally aged silica-alumina slurry; and (d) recovering a precipitate solid from the silica-alumina slurry or the hydrothermally aged silica-alumina slurry, wherein the precipitate solid comprises the silica-alumina composition.
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Patent Agency Ranking
26.发明申请公开(公告)号：US20230094207A1
公开(公告)日：2023-03-30
申请号：US18051000
申请日：2022-10-30
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
Abstract: Provided is a continuous process for converting waste plastic into recycle for polyethylene polymerization or for normal alpha olefins. The process comprises selecting waste plastics containing polyethylene and/or 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 crude unit in a refinery from which is recovered a straight run naphtha fraction (C5-C8) or a propane/butane (C3-C4) fraction. The straight run naphtha fraction, or propane and butane (C3-C4) fraction, is passed to a steam cracker for ethylene production. The ethylene is converted to normal alpha olefin and/or polyethylene. Also, a heavy fraction from the pyrolysis reactor can be combined with a heavy fraction of normal alpha olefin stream recovered from the steam cracker. The combined heavy fraction and heavy fraction of normal alpha olefin stream can be passed to a wax hydrogenation zone to produce wax.
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27.发明授权公开(公告)号：US11518943B2
公开(公告)日：2022-12-06
申请号：US17131839
申请日：2020-12-23
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
Abstract: Provided is a continuous process for converting waste plastic into recycle for polyethylene polymerization or for normal alpha olefins. The process comprises selecting waste plastics containing polyethylene and/or 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 crude unit in a refinery from which is recovered a straight run naphtha fraction (C5-C8) or a propane/butane (C3-C4) fraction. The straight run naphtha fraction, or propane and butane (C3-C4) fraction, is passed to a steam cracker for ethylene production. The ethylene is converted to normal alpha olefin and/or polyethylene. Also, a heavy fraction from the pyrolysis reactor can be combined with a heavy fraction of normal alpha olefin stream recovered from the steam cracker. The combined heavy fraction and heavy fraction of normal alpha olefin stream can be passed to a wax hydrogenation zone to produce wax.
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28.发明授权公开(公告)号：US11174437B2
公开(公告)日：2021-11-16
申请号：US17131877
申请日：2020-12-23
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
Abstract: Provided is a continuous process for converting waste plastic into recycle for polypropylene 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 naphtha/diesel fraction, a heavy fraction, and char. Pyrolysis oil and wax, comprising the naphtha/diesel fraction and heavy fraction, is sent to a refinery FCC unit. A liquid petroleum gas C3-C5 olefin/paraffin mixture is recovered from the FCC unit and passed to a refinery alkylation unit. A propane fraction is recovered from the alkylation unit and passed to a dehydrogenation unit to produce propylene. The propylene is passed to a propylene polymerization reactor.
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公开(公告)号：US11174436B2
公开(公告)日：2021-11-16
申请号：US17131832
申请日：2020-12-23
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
Abstract: Provided is a continuous process for converting waste plastic into a feedstock for polyethylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or 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 then separated into offgas, a pyrolysis oil comprising a naphtha/diesel/heavy fraction, and char. The pyrolysis oil is passed to a crude unit in a refinery from which a naphtha fraction (C5-C8), or a propane and butane (C3-C4) fraction, is recovered. The naphtha fraction, or propane and butane (C3-C4) fraction, is then passed to a steam cracker for ethylene production.
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公开(公告)号：US20210189253A1
公开(公告)日：2021-06-24
申请号：US17131861
申请日：2020-12-23
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
Abstract: Provided is a continuous process for converting waste plastic into recycle for polypropylene 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 naphtha/diesel fraction, a heavy fraction, and char. Pyrolysis oil and wax, comprising naphtha/diesel and heavy fractions, is passed to a refinery FCC unit. A liquid petroleum gas C3 olefin/paraffin mixture is recovered from the FCC unit. The C3 paraffins and C3 olefins are separated into different fractions with the C3 olefin fraction passed to a propylene polymerization reactor, and the C3 paraffin fraction passed optionally to a dehydrogenation unit to produce additional propylene.
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