公开(公告)号：US20240157274A1

公开(公告)日：2024-05-16

申请号：US18511835

申请日：2023-11-16

Applicant: CHEVRON U.S.A. INC.

Inventor： Steven Xuqi SONG ,  Blaine HOLMES ,  Wayne MUNSTERMAN ,  Tom BERRY ,  Xiaohui ZHANG ,  Deanne KELLY ,  Ali VAKIL ,  Ehsan ZAMAN ,  Marvin WEISS ,  Matthew D. POLAND ,  Brian HANSON

IPC: B01D19/00 ,  B01L5/02

CPC classification number: B01D19/0057 ,  B01L5/02 ,  B01L2300/0681 ,  B01L2400/0463

Abstract: A gas-liquid separator, adapted for separating liquid and gas in an ebullated bed reactor under operating conditions, is disclosed. The device may be used in the petroleum and chemical processing industries in catalytic reactions of hydrocarbonaceous feedstocks in the presence of hydrogen, at an elevated temperature and pressure, to separate gas and liquid from gas and liquid mixtures within the reactor. The device is generally vertically oriented and may be installed in the flow through pan of an ebullated bed reactor. The device comprises a transfer conduit for transferring a gas-liquid mixture stream from a lower section of an ebullated bed reactor to an upper section of the reactor, a vortex separation section having gas-rich and liquid-rich stream outlets, and a gas-rich stream outlet conduit located on top of and adjacent to the vortex separation section. The transfer conduit includes internal means to produce a spiral flow in the gas-liquid mixture, such as a helical or spiral insert. The vortex separation section is located at the top of the transfer conduit and includes separation means to separate the gas-liquid mixture stream into a liquid-rich stream and a gas-rich stream. A separator conduit extending from the top of the vortex separation section to the transfer conduit upper opening, aligned with and having substantially the same cross-sectional dimensions as the gas-rich stream outlet, may be used as the separation means. Among the benefits provided are improved efficiency of gas and liquid separation and reduced gas holdup within the reactor.

公开(公告)号：US20250099935A1

公开(公告)日：2025-03-27

申请号：US18728876

申请日：2023-01-12

Applicant: CHEVRON U.S.A. INC.

Inventor： Steven Xuqi SONG ,  Michael MCMULLIN

IPC: B01J10/00 ,  B01J8/00 ,  B01J8/18

Abstract: An improved ebullated bed reactor, a method for modifying an existing ebullated bed reactor to improve performance, and associated processes for improving the performance of ebullated reactors during hydroprocessing operation. In one aspect, the addition of a catalyst withdrawal outlet located at the top of the ebullated bed reactor allows for fine spent catalyst to be withdrawn during reactor operation and for certain performance improvements to be realized.

公开(公告)号：US20240181414A1

公开(公告)日：2024-06-06

申请号：US18556671

申请日：2022-04-21

Applicant: CHEVRON U.S.A INC.

Inventor： Steven Xuqi SONG ,  Matthew D. POLAND ,  Matthew D. FORMEL ,  David KASHEVAROFF ,  James France ,  Timothy D. EVANS

IPC: B01J8/00 ,  B01D24/04 ,  C10G49/00

CPC classification number: B01J8/006 ,  B01D24/04 ,  C10G49/002

Abstract: A filtration device for a down-flow catalytic hydroprocessing reactor is disclosed. The filtration device may be used in the petroleum and chemical processing industries in catalytic reactions of hydrocarbonaceous feedstocks in the presence of hydrogen, at an elevated temperature and pressure, to remove contaminants from mixed gas and liquid feedstreams to reactor catalyst beds. The filtration device may be provided as a horizontal tray installation at the top of a reactor, whereby feedstream liquid is passed through a filtration media in a radially inward direction from the wall of the reactor to the center of the filtration device and thereafter to the reactor catalyst bed. Among the benefits provided are the minimization of scale and small/fine particulates that reach the catalyst bed below the device, reduced pressure drop through the reactor, even when the filter is completely fouled, and the potential for added catalyst volume due to the reduced need to use catalyst grading materials.