Heavy oil hydrotreating system and heavy oil hydrotreating method

    公开(公告)号:US11001768B2

    公开(公告)日:2021-05-11

    申请号:US15775694

    申请日:2016-11-01

    摘要: A heavy oil hydrotreating system has a prehydrotreating reaction zone, a transition reaction zone, and a hydrotreating reaction zone that are connected in series successively, sensor units, and a control unit. In the initial reaction stage, the prehydrotreating reaction zone includes at least two prehydrotreating reactors connected in parallel, and the transition reaction zone includes or doesn't include prehydrotreating reactors; in the reaction process, the control unit controls material feeding to and material discharging from each prehydrotreating reactor in the prehydrotreating reaction zone according to pressure drop signals of the sensor units, so that when the pressure drop in any of the prehydrotreating reactors in the prehydrotreating reaction zone reaches a predetermined value, the prehydrotreating reactor in which the pressure drop reaches the predetermined value is switched from the prehydrotreating reaction zone to the transition reaction zone.

    Divided-wall column
    5.
    发明授权

    公开(公告)号:US10005002B2

    公开(公告)日:2018-06-26

    申请号:US15031377

    申请日:2014-10-21

    IPC分类号: B01D3/14 B01D3/00

    CPC分类号: B01D3/141 B01D3/008

    摘要: A dividing wall column (10), comprising: a partition plate (11) arranged along an axial direction of the dividing wall column (10); a first shaft (22) arranged along a radial direction of the dividing wall column (10), and a first splitter plate (23) with an end connected to the first shaft (22), which are both placed beneath the partition plate (11), wherein the first splitter plate (23) is configured to be pivotable around the first shaft (22), so as to control distribution of a stream from below the first splitter plate (23) into spaces formed at two sides of the partition plate (11); and a second shaft (13) arranged along the radial direction of the dividing wall column (10), and a second splitter plate (20) with an end connected to the second shaft (13), which are both placed above the partition plate (11), wherein the second splitter plate (20) is configured to be pivotable around the second shaft (13), so as to control the stream from above the second liquid splitter plate (20) into the spaces formed at two sides of the partition plate (11).

    Method for Preparing Hexadecahydropyrene
    8.
    发明申请

    公开(公告)号:US20200262769A1

    公开(公告)日:2020-08-20

    申请号:US16464405

    申请日:2017-11-30

    IPC分类号: C07C5/10

    摘要: A method for preparing hexadecahydropyrene includes the step of carrying out the hydrogenation reaction to hydrocarbon oil containing pyrene compounds in the presence of a hydrogenation catalyst. The pyrene compounds are selected from at least one of pyrene and unsaturated hydrogenation products thereof. The hydrogenation catalyst contains a carrier and an active metal component loaded on the carrier. The active metal component is Pt and/or Pd and the carrier contains a small crystal size Y zeolite, alumina and amorphous silica-alumina. The small crystal size Y zeolite has an average grain diameter of 200-700 nm, a molar ratio of SiO2 to Al2O3 of 40-120, a relative crystallinity of ≥95%, and a specific surface area of 900-1,200 m2/g. The pore volume of secondary pores in 1.7-10 nm diameter is more than 50% of the total pore volume.