公开(公告)号：US20230032916A1

公开(公告)日：2023-02-02

申请号：US17388294

申请日：2021-07-29

Applicant: CHEVRON U.S.A. INC.

Inventor： Mark Charlesworth

IPC: G01N21/77

Abstract: The instant application pertains to a process for improving or managing the recycling of monoethylene glycol from an oil and gas operation with more efficient and cost-effective monitoring. The process comprises repeatedly testing an aqueous solution comprising monoethylene glycol using a test strip to obtain results for various known parameters. The results can be calibrated versus the known parameters to determine an adjustment to the test strip result.

公开(公告)号：US11566511B2

公开(公告)日：2023-01-31

申请号：US17089539

申请日：2020-11-04

Applicant: CHEVRON U.S.A. INC. ,  CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Robert Kwan Meng Seah ,  Hailing An ,  Thomas E. O'Donnell ,  Darmindra Arumugam

IPC: G01V3/38 ,  G01V3/18 ,  G01R33/38 ,  E21B47/002

Abstract: A magneto-quasistatic field may be used to align hydrogen of materials within a structure and/or to disrupt the alignment of hydrogen of materials within the structure. Realignment of the hydrogen after the disruption may cause emission of energy from the hydrogen. The characteristic(s) of the energy may be detected and used to generate image(s) of interior portion(s) of the structure.

公开(公告)号：US11566182B2

公开(公告)日：2023-01-31

申请号：US17131928

申请日：2020-12-23

Applicant: Chevron U.S.A. Inc.

Inventor： Hye-Kyung Timken ,  Cameron McCord

IPC: C10B53/07 ,  C10G51/04 ,  C10G57/02 ,  C10G73/02 ,  C10G51/02 ,  C10G9/36

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.

公开(公告)号：US11565986B2

公开(公告)日：2023-01-31

申请号：US17388105

申请日：2021-07-29

Applicant: CHEVRON U.S.A. INC.

Inventor： Joshua A. Thompson ,  Dan Xie

IPC: C07C7/13 ,  B01D53/047 ,  B01J20/16 ,  C07C7/00

Abstract: The present invention describes a process to separate ethylene products from impurities such as nitrogen, hydrogen, ethane, propane and isobutane without the need for distillation processes.

公开(公告)号：US11565943B2

公开(公告)日：2023-01-31

申请号：US17173712

申请日：2021-02-11

Applicant: CHEVRON U.S.A. INC.

Inventor： Joel Edward Schmidt ,  Adeola Florence Ojo

IPC: B01J29/74 ,  C01B39/48 ,  C10G49/08 ,  C01B39/02

Abstract: A method is disclosed making a molecular of TON framework type having unique properties. The method uses 1,3,4-trimethylimidazolium cations as a structure directing agent and a combined source of silicon and aluminum selected from alumina-coated silica and aluminosilicate zeolites. The obtained molecular sieve can be used in processes for dewaxing paraffinic hydrocarbon feedstocks.

公开(公告)号：US20220414485A1

公开(公告)日：2022-12-29

申请号：US17777930

申请日：2020-11-24

Applicant: Chevron U.S.A. Inc.

Inventor： Larry A. BOWDEN, Jr. ,  Juan Esteban E. Montero ,  Keith Stanley JOHNSTON ,  Steven R. SZABO

IPC: G06N5/02 ,  G06Q10/06 ,  G06F40/20

Abstract: Words in a requirement may be decomposed into sub-parts to dynamically generate a requirement graph model. The requirement graph model may include nodes for the sub-parts of the requirement. The requirement graph model may be connected to a constraint graph model based on one or more nodes of the requirement graph model. The connection of the requirement graph model to the constraint graph model may form a combined graph model, and analysis may be performed based on the combined graph model.

公开(公告)号：US20220389304A1

公开(公告)日：2022-12-08

申请号：US17770559

申请日：2020-10-30

Applicant: CHEVRON ORONITE COMPANY LLC ,  CHEVRON U.S.A. INC.

Inventor： Varadarajan DWARAKANATH ,  Gayani W. PINNAWALA ,  Andrew M. THOMAS ,  Curtis B. CAMPBELL ,  Andrew M. DAVIDSON ,  Ping WANG

IPC: C09K8/68 ,  C09K8/70 ,  C09K8/60

Abstract: The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.

公开(公告)号：US20220389302A1

公开(公告)日：2022-12-08

申请号：US17816760

申请日：2022-08-02

Applicant: Chevron U.S.A. Inc. ,  Triad National Security, LLC

Inventor： Nathan James Welch ,  Hakim Boukhalfa ,  Robert David Gilbertson ,  Rajesh S. Nair ,  Deryck Edward Matthew Williams ,  Timothy Leo Quirk

IPC: C09K8/487 ,  C04B28/02 ,  C04B24/26 ,  E21B33/14 ,  E21B47/005

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.

公开(公告)号：US11518945B2

公开(公告)日：2022-12-06

申请号：US17131894

申请日：2020-12-23

Applicant: Chevron U.S.A. Inc.

Inventor： Hye-Kyung Timken

IPC: C10G1/10 ,  C10G11/18 ,  C07C4/06 ,  C08F10/06 ,  C10G45/58 ,  C10M177/00 ,  C10M109/02 ,  C10B53/07 ,  C10G1/00 ,  C10N70/00

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.

公开(公告)号：US11518944B2

公开(公告)日：2022-12-06

申请号：US17131845

申请日：2020-12-23

Applicant: Chevron U.S.A. Inc.

Inventor： Hye-Kyung Timken

IPC: C10G1/10 ,  C10B53/07 ,  C10G1/00 ,  C10G11/18 ,  C07C2/76 ,  C07C4/04 ,  C08F10/02

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.