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公开(公告)号：US11359147B2
公开(公告)日：2022-06-14
申请号：US17237633
申请日：2021-04-22
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
Abstract: Provided in one embodiment is a continuous process for converting waste plastic comprising polyethylene and/or polypropylene into recycle for polypropylene polymerization. The process comprises selecting waste plastics containing polyethylene, polypropylene, or a mixture thereof, 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 comprising a naphtha, diesel and heavy fractions, and char. The pyrolysis oil, or at least a fraction, is passed to a filtration/metal oxide treatment, with the treated product passed to a refinery FCC unit. A liquid petroleum gas C3 olefin/paraffin mixture fraction is recovered from the FCC unit, as well as a C4 olefin/paraffin mixture fraction. The C3 olefin fraction can be passed to a propylene polymerization reactor, and the C3 paraffin passed to a dehydrogenation unit to produce propylene for further polymerization.
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公开(公告)号：US20210189248A1
公开(公告)日：2021-06-24
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：US20170216828A1
公开(公告)日：2017-08-03
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：US11959025B2
公开(公告)日：2024-04-16
申请号：US18051002
申请日：2022-10-30
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
IPC: C10G1/10 , C07C4/06 , C08F10/06 , C10B53/07 , C10G1/00 , C10G11/18 , C10G45/58 , C10M109/02 , C10M177/00 , C10N70/00
CPC classification number: C10G1/10 , C07C4/06 , C08F10/06 , C10B53/07 , C10G1/002 , C10G11/18 , C10G45/58 , C10M109/02 , C10M177/00 , C10G2300/1003 , C10G2300/202 , C10G2300/205 , C10G2300/304 , C10G2300/305 , C10G2300/308 , C10G2300/4006 , C10G2300/4012 , C10G2300/4018 , C10G2400/02 , C10G2400/04 , C10G2400/08 , C10G2400/10 , C10G2400/26 , C10M2203/003 , C10N2070/00
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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15.发明授权公开(公告)号：US11905466B2
公开(公告)日：2024-02-20
申请号：US18051001
申请日：2022-10-30
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
CPC classification number: C10G1/10 , C07C2/76 , C07C4/04 , C08F10/02 , C10B53/07 , C10G1/002 , C10G11/18 , C07C2/54 , C10G2300/1003 , C10G2300/202 , C10G2300/205 , C10G2300/304 , C10G2300/305 , C10G2400/02 , C10G2400/04 , C10G2400/08 , C10G2400/20 , C10G2400/22 , C10G2400/26
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. In another embodiment, a naphtha fraction (C5-C8) is recovered from the alkylation unit and passed to the steam cracker. In another embodiment, a propane/propylene fraction (C3-C3) is recovered from the FCC and passed to the steam cracker.
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Patent Agency Ranking
公开(公告)号：US11584890B2
公开(公告)日：2023-02-21
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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公开(公告)号：US20230048572A1
公开(公告)日：2023-02-16
申请号：US17964754
申请日：2022-10-12
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken
IPC: C10G1/10 , C07C4/04 , C10G45/58 , C08F10/02 , C10M177/00 , C10M105/04 , C10B53/07 , C10G1/00
Abstract: Provided is a continuous process for converting waste plastic into recycle for polyethylene polymerization. In one embodiment, 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. The naphtha/diesel fraction is passed to a crude unit distillation column in a refinery where a straight run naphtha (C5-C8) fraction or a propane/butane (C3-C4) fraction is recovered. The straight run naphtha fraction (C5-C8) or the propane/butane (C3-C4) fraction is passed to a steam cracker for ethylene production. The heavy fraction from the pyrolysis unit can also be passed to an isomerization dewaxing unit to produce a base oil.
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公开(公告)号：US20220204873A1
公开(公告)日：2022-06-30
申请号：US17137928
申请日：2020-12-30
Applicant: Chevron U.S.A. Inc.
Inventor： Ling Jiao , Bi-Zeng Zhan , Don Bushee , Theodorus Ludovicus Michael Maesen , Hye-Kyung Timken , Richard Dutta , Jay Parekh
Abstract: 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.
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19.发明申请公开(公告)号：US20210301210A1
公开(公告)日：2021-09-30
申请号：US17131928
申请日：2020-12-23
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken , Cameron McCord
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.
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20.发明申请公开(公告)号：US20210301209A1
公开(公告)日：2021-09-30
申请号：US17131910
申请日：2020-12-23
Applicant: Chevron U.S.A. Inc.
Inventor： Hye-Kyung Timken , Cameron McCord
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 is passed to a refinery FCC unit from which a liquid petroleum gas C3 olefin/paraffin mixture fraction is recovered, as well as a C4 olefin/paraffin mixture fraction. The liquid petroleum gas C3 olefin/paraffin mixture fraction is passed to a steam cracker for ethylene production. The C4 olefin/paraffin mixture fraction is passed to a refinery alkylation unit, from which a n-butane and naphtha feed for a stream cracker to produce ethylene is recovered.
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