公开(公告)号：US20190023994A1

公开(公告)日：2019-01-24

申请号：US16038719

申请日：2018-07-18

Applicant: Chevron U.S.A. Inc.

Inventor： Evan Shigeto Hatakeyama ,  Kyle Kozo Higashidani ,  Francisco Lopez-Linares ,  Michelle Marie Hart

IPC: C10G29/10 ,  C10G29/20 ,  C10G31/08 ,  C10G31/10 ,  B01D53/14

Abstract: A process for the removal of mercury comprising reacting a sulfide source with HgS solids to increase the size and sedimentation rate of the submicron mercury for removal by filtration or other mechanical processes is described herein.An embodiment of the invention is the use of monothiols to react with mercury to form dissolved mercury, wherein silica with immobilized thiol groups is added to the dissolved mercury, allowing for removal with a coarse filter.

公开(公告)号：US20180029910A1

公开(公告)日：2018-02-01

申请号：US15223938

申请日：2016-07-29

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  Gini Chauhan ,  Evan Shigeto Hatakeyama

IPC: C02F9/00 ,  C02F1/42 ,  C02F1/20 ,  C02F1/465 ,  B01D61/02 ,  B01D61/14 ,  B01D61/58 ,  C02F1/463 ,  C02F1/44 ,  B01D61/36

CPC classification number: C02F9/00 ,  B01D61/025 ,  B01D61/04 ,  B01D61/145 ,  B01D61/147 ,  B01D61/16 ,  B01D61/364 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/06 ,  B01D2311/10 ,  B01D2311/25 ,  C02F1/20 ,  C02F1/42 ,  C02F1/441 ,  C02F1/444 ,  C02F1/447 ,  C02F1/463 ,  C02F1/465 ,  C02F2001/425 ,  C02F2103/10 ,  C02F2303/16 ,  B01D2311/12 ,  B01D2311/18 ,  B01D2311/2642 ,  B01D2311/26 ,  B01D2311/2623

Abstract: A process treats high temperature produced water by passing a stream to an electrocoagulation unit and then to a membrane distillation (MD) unit where the stream contacts a hydrophobic membrane on a feed side and deionized water contacts the membrane on a product side. A distilled water stream is recovered and collected with the product side stream to form a volume-depleted exit produced water stream on the feed side of the hydrophobic membrane. The exit product side stream is passed through a heat exchanger to form a stream that is returned to a location upstream of the MD unit for an additional pass through the MD unit, thereby recovering additional water. The stream can be returned multiple times to achieve high recovery and to form a final stream leaving the MD unit having a temperature from 40-60° C., a total oil and grease content no greater than 500 mg/L, and a suspended solids content no greater than 200 mg/L. A portion of the distilled water stream from the membrane distillation unit can be used to form a brine solution used to regenerate used ion exchange resin in a water softening system.

公开(公告)号：US10041014B2

公开(公告)日：2018-08-07

申请号：US15618730

申请日：2017-06-09

Applicant: Chevron U.S.A. Inc.

Inventor： Joshua Allen Thompson ,  Daniel Chinn ,  Evan Shigeto Hatakeyama ,  Ryan Oliver Owen

IPC: C10L3/06 ,  C10L3/10 ,  B01D53/14 ,  B01D53/64 ,  B01D53/78 ,  B01J20/02 ,  B01J20/08 ,  B01J20/10 ,  B01J20/12 ,  B01J20/18 ,  B01J20/20 ,  B01D53/26 ,  B01D53/77 ,  B01D53/96

Abstract: A process for removal of mercury in a gas dehydration system comprising (a) adding a complexing agent to a recirculated glycol solvent as part of the glycol solution feed prior to or at the dehydration liquid contactor and recirculating continuously with the glycol solvent, (b) selectively reacting the complexing agent with mercury in the wet natural gas to remove the mercury from the dry natural gas product, (c) and feeding the rich glycol with the complexing agent to a regenerator and continuously regenerating.

公开(公告)号：US20170355920A1

公开(公告)日：2017-12-14

申请号：US15618730

申请日：2017-06-09

Applicant: Chevron U.S.A. Inc.

Inventor： Joshua Allen Thompson ,  Daniel Chinn ,  Evan Shigeto Hatakeyama ,  Ryan Oliver Owen

IPC: C10L3/10 ,  B01J20/18 ,  B01J20/10 ,  B01D53/14 ,  B01J20/12 ,  B01J20/20 ,  B01D53/64 ,  B01J20/08 ,  B01D53/78 ,  B01J20/02

CPC classification number: C10L3/101 ,  B01D53/1425 ,  B01D53/1493 ,  B01D53/263 ,  B01D53/64 ,  B01D53/77 ,  B01D53/78 ,  B01D53/96 ,  B01D2251/206 ,  B01D2251/304 ,  B01D2251/306 ,  B01D2251/404 ,  B01D2251/60 ,  B01D2251/80 ,  B01D2252/2023 ,  B01D2252/2025 ,  B01D2252/606 ,  B01D2252/608 ,  B01D2256/245 ,  B01D2257/602 ,  B01J20/0237 ,  B01J20/0285 ,  B01J20/08 ,  B01J20/103 ,  B01J20/12 ,  B01J20/18 ,  B01J20/20 ,  C10L3/106 ,  C10L2230/02 ,  C10L2290/542

Abstract: A process for removal of mercury in a gas dehydration system comprising (a) adding a complexing agent to a recirculated glycol solvent as part of the glycol solution feed prior to or at the dehydration liquid contactor and recirculating continuously with the glycol solvent, (b) selectively reacting the complexing agent with mercury in the wet natural gas to remove the mercury from the dry natural gas product, (c) and feeding the rich glycol with the complexing agent to a regenerator and continuously regenerating.

公开(公告)号：US10399880B2

公开(公告)日：2019-09-03

申请号：US15902090

申请日：2018-02-22

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  Gini Yash Shah ,  Evan Shigeto Hatakeyama

IPC: C02F9/00 ,  B01D61/36 ,  B01D61/02 ,  B01D61/14 ,  B01D61/58 ,  B01D61/04 ,  B01D61/16 ,  C02F1/44 ,  C02F1/42 ,  C02F1/20 ,  C02F1/463 ,  C02F1/465 ,  C02F1/24

Abstract: A system for treating high temperature produced water includes an electrocoagulation unit, a membrane distillation unit in communication with the outlet of the electrocoagulation unit having a hydrophobic membrane with a feed side for receiving the produced water stream and a product side for receiving a deionized water stream. A heat recovery heat exchanger is in communication with the membrane distillation unit for receiving two streams, one from each side of the hydrophobic membrane, such that heat is exchanged between the two streams. A line leaving the heat exchanger returns a heated stream from the heat exchanger to a location in a line upstream of the membrane distillation unit. A brine tank in communication with the membrane distillation unit receives a portion of a stream from the membrane product side and contains a concentrated brine solution containing the portion of the stream from the membrane product side and sodium chloride.

公开(公告)号：US20180179096A1

公开(公告)日：2018-06-28

申请号：US15902090

申请日：2018-02-22

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  Gini Yash Shah ,  Evan Shigeto Hatakeyama

IPC: C02F9/00

CPC classification number: C02F9/00 ,  B01D61/025 ,  B01D61/04 ,  B01D61/145 ,  B01D61/147 ,  B01D61/16 ,  B01D61/364 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/06 ,  B01D2311/10 ,  B01D2311/25 ,  C02F1/20 ,  C02F1/24 ,  C02F1/42 ,  C02F1/441 ,  C02F1/444 ,  C02F1/447 ,  C02F1/463 ,  C02F1/465 ,  C02F2001/425 ,  C02F2303/16 ,  Y02A20/131 ,  B01D2311/12 ,  B01D2311/18 ,  B01D2311/2642 ,  B01D2311/26 ,  B01D2311/2623

Abstract: A system for treating high temperature produced water includes an electrocoagulation unit, a membrane distillation unit in communication with the outlet of the electrocoagulation unit having a hydrophobic membrane with a feed side for receiving the produced water stream and a product side for receiving a deionized water stream. A heat recovery heat exchanger is in communication with the membrane distillation unit for receiving two streams, one from each side of the hydrophobic membrane, such that heat is exchanged between the two streams. A line leaving the heat exchanger returns a heated stream from the heat exchanger to a location in a line upstream of the membrane distillation unit. A brine tank in communication with the membrane distillation unit receives a portion of a stream from the membrane product side and contains a concentrated brine solution containing the portion of the stream from the membrane product side and sodium chloride.

公开(公告)号：US09932257B2

公开(公告)日：2018-04-03

申请号：US15223938

申请日：2016-07-29

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  Gini Chauhan ,  Evan Shigeto Hatakeyama

IPC: C02F1/44 ,  C02F1/42 ,  C02F1/20 ,  C02F1/465 ,  B01D61/36 ,  C02F1/463 ,  B01D61/58 ,  B01D61/14 ,  B01D61/02 ,  C02F9/00 ,  C02F103/10

CPC classification number: C02F9/00 ,  B01D61/025 ,  B01D61/04 ,  B01D61/145 ,  B01D61/147 ,  B01D61/16 ,  B01D61/364 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/06 ,  B01D2311/10 ,  B01D2311/25 ,  C02F1/20 ,  C02F1/42 ,  C02F1/441 ,  C02F1/444 ,  C02F1/447 ,  C02F1/463 ,  C02F1/465 ,  C02F2001/425 ,  C02F2103/10 ,  C02F2303/16 ,  B01D2311/12 ,  B01D2311/18 ,  B01D2311/2642 ,  B01D2311/26 ,  B01D2311/2623

Abstract: A process treats high temperature produced water by passing a stream to an electrocoagulation unit and then to a membrane distillation (MD) unit where the stream contacts a hydrophobic membrane on a feed side and deionized water contacts the membrane on a product side. A distilled water stream is recovered and collected with the product side stream to form a volume-depleted exit produced water stream on the feed side of the hydrophobic membrane. The exit product side stream is passed through a heat exchanger to form a stream that is returned to a location upstream of the MD unit for an additional pass through the MD unit, thereby recovering additional water. The stream can be returned multiple times to achieve high recovery and to form a final stream leaving the MD unit having a temperature from 40-60 ° C., a total oil and grease content no greater than 500 mg/L, and a suspended solids content no greater than 200 mg/L. A portion of the distilled water stream from the membrane distillation unit can be used to form a brine solution used to regenerate used ion exchange resin in a water softening system.