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    Reactor heating to achieve minimum pressurization temperature
    3.
    发明授权
    Reactor heating to achieve minimum pressurization temperature 有权

    公开(公告)号：US11298672B2

    公开(公告)日：2022-04-12

    申请号：US16996999

    申请日：2020-08-19

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Thomas R. Kiliany, Jr. ,  Suriyanarayanan Rajagopalan

    IPC: B01J8/02 ,  B01J19/00 ,  B01J19/24 ,  C10G47/36

    Abstract: Systems and methods are provided for performing the initial heating phase for a thick wall reactor, such as a hydroprocessing reactor, by using heat tracing to heat the exterior walls of the reactor. Instead of attempting to initially heat the reactor by passing a low pressure heat transfer gas through the interior of the reactor, external heater(s) placed under the reactor insulation can be used to heat the exterior of the reactor. An example of a suitable external heater is a heat tracing blanket, where heat is provided by passing steam through pipes in contact with the external surface or by electrical heaters in contact with the external surface. This can allow for more rapid heating of the reactor, so that a target temperature can be achieved in a time of 5.0 hours or less.

    Fluidized coking with increased production of liquids
    4.
    发明授权
    Fluidized coking with increased production of liquids 有权

    公开(公告)号：US10400177B2

    公开(公告)日：2019-09-03

    申请号：US15812396

    申请日：2017-11-14

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Tien V. Le ,  Brenda A. Raich ,  Bing Du ,  Mohsen N. Harandi ,  Suriyanarayanan Rajagopalan

    IPC: C07C2/06 ,  C07C4/04 ,  C10J3/84 ,  C10B49/22 ,  C10B55/10 ,  C07C29/151

    Abstract: Systems and methods are provided for integrating a fluidized coking process, optionally a coke gasification process, and processes for production of additional liquid products from the coking and/or gasification process. In some aspects, the integrated processes can allow for conversion of olefins generated during a fluidized coking process to form additional liquid products. Additionally or alternately, in some aspects the integrated processes can allow for separation of syngas from the flue gas/fuel gas generated by a gasifier integrated with a fluidized coking process. This syngas can then be used to form methanol, which can then be converted in a methanol conversion process to form heavier products. In such aspects, olefins generated during the fluidized coking process can be added to the methanol conversion process to improve the yield. Additionally, in various aspects, the off-gas from the integrated conversion process can be used as an additional paraffin feed that can be recycled to one of the heat integration conduits in the fluidized coker for additional generation of olefins. This can provide a further increase in liquid yields using a carbon source (C4− paraffins) that is conventionally viewed as a low value product from coking.

    REACTOR HEATING TO ACHIEVE MINIMUM PRESSURIZATION TEMPERATURE
    5.
    发明申请
    REACTOR HEATING TO ACHIEVE MINIMUM PRESSURIZATION TEMPERATURE 有权

    公开(公告)号：US20210113985A1

    公开(公告)日：2021-04-22

    申请号：US16996999

    申请日：2020-08-19

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Thomas R. Kiliany, JR. ,  Suriyanarayanan Rajagopalan

    IPC: B01J19/00 ,  C10G47/36

    Abstract: Systems and methods are provided for performing the initial heating phase for a thick wall reactor, such as a hydroprocessing reactor, by using heat tracing to heat the exterior walls of the reactor. Instead of attempting to initially heat the reactor by passing a low pressure heat transfer gas through the interior of the reactor, external heater(s) placed under the reactor insulation can be used to heat the exterior of the reactor. An example of a suitable external heater is a heat tracing blanket, where heat is provided by passing steam through pipes in contact with the external surface or by electrical heaters in contact with the external surface. This can allow for more rapid heating of the reactor, so that a target temperature can be achieved in a time of 5.0 hours or less.

    METHODS FOR METHANOL-TO-GASOLINE CONVERSION WITH POST-PROCESSING OF HEAVY GASOLINE HYDROCARBONS
    6.
    发明申请
    METHODS FOR METHANOL-TO-GASOLINE CONVERSION WITH POST-PROCESSING OF HEAVY GASOLINE HYDROCARBONS 有权

    公开(公告)号：US20210078921A1

    公开(公告)日：2021-03-18

    申请号：US17014991

    申请日：2020-09-08

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Mohsen N. Harandi ,  Mitch L. Hindman ,  Suriyanarayanan Rajagopalan

    IPC: C07C5/22 ,  C07C41/09 ,  C10G3/00 ,  C10L1/02

    Abstract: Methanol-to-gasoline conversion may be performed using a heavy gasoline treatment, followed by a separation operation. Methanol may be converted into a first product mixture comprising dimethyl ether (DME) under DME formation conditions. In a methanol-to-gasoline (MTG) reactor, the first product mixture may be converted under MTG conversion conditions to produce a second product mixture comprising light gasoline hydrocarbons and untreated heavy gasoline hydrocarbons. The untreated heavy gasoline hydrocarbons may be separated from the light gasoline hydrocarbons and transferred to a heavy gasoline treatment (HGT) reactor. The untreated heavy gasoline hydrocarbons may be catalytically reacted in the HGT reactor to form a third product mixture. A heavy hydrocarbon fraction may be separated from the third product mixture. The heavy hydrocarbon fraction includes heavy gasoline hydrocarbons having a lower boiling endpoint than does the untreated heavy gasoline hydrocarbons.

    Methods for methanol-to-gasoline conversion with forwarding methanol processing
    10.
    发明授权
    Methods for methanol-to-gasoline conversion with forwarding methanol processing 有权

    公开(公告)号：US11130915B2

    公开(公告)日：2021-09-28

    申请号：US16903252

    申请日：2020-06-16

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Mohsen N. Harandi ,  Suriyanarayanan Rajagopalan ,  David W. Staubs ,  Terry E. Helton ,  Mitch L. Hindman

    IPC: C10G3/00 ,  B01D3/00 ,  C07C41/09 ,  C10L1/06 ,  C07C41/42

    Abstract: Methanol-to-gasoline (MTG) conversion may be performed with forward methanol processing. Methanol may be fed to a first reactor where it may be catalytically converted under dimethyl ether formation conditions in the presence of a first catalyst to form a product mixture comprising dimethyl ether (DME), methanol, and water. The DME may be separated from the methanol and the water and delivered to a second reactor. In the second reactor, the DME may be catalytically converted under MTG conversion conditions in the presence of a second catalyst to form a second product mixture comprising gasoline hydrocarbons and light hydrocarbon gas. The methanol and the water from the first reactor may be separated further to obtain substantially water-free methanol, which may be delivered to the second reactor. The separation of methanol from the water may be performed using the light hydrocarbon gas to effect stripping of the methanol.

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