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    Bimetallic Materials Comprising Cermets with Improved Metal Dusting Corrosion and Abrasion/Erosion Resistance
    2.
    发明申请
    Bimetallic Materials Comprising Cermets with Improved Metal Dusting Corrosion and Abrasion/Erosion Resistance 有权

    公开(公告)号：US20220380871A1

    公开(公告)日：2022-12-01

    申请号：US17772077

    申请日：2020-10-29

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Changmin Chun ,  Ning Ma ,  Jorge J. Perdomo ,  John S. Coleman ,  Larry L. Iaccino

    IPC: C22C29/00 ,  C22C30/02 ,  B23K26/34

    Abstract: Methods and compositions are provided for improving metal dusting corrosion, abrasion resistance and/or erosion resistance for various materials, preferably for applications relating to high-temperature reactors, including dense fluidized bed reactor components. In particular, cermets comprising (a) at least one ceramic phase selected from the group consisting of metal carbides, metal nitrides, metal borides, metal oxides, metal carbonitrides, and mixtures of thereof and (b) at least one metal alloy binder phase are provided. Ceramic phase materials include chromium carbide (Cr23C6). Metal alloy binder phase materials include β-NiAl intermetallic alloys and Ni3Sn2 intermetallic alloys, as well as alloys that contain α-Cr and/or γ′-Ni3Al hard phases. Preferably, bimetallic materials are provided when the cermet compositions are applied using a laser, e.g., a laser cladding method such as high power direct diode (HPDD) laser, or by plasma-based methods such as plasma transfer arc (PTA) welding and powder plasma welding (PPW).

    Processing pyrolysis tar particulates
    3.
    发明授权
    Processing pyrolysis tar particulates 有权

    公开(公告)号：US11473024B2

    公开(公告)日：2022-10-18

    申请号：US17045416

    申请日：2019-03-20

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： John S. Coleman ,  Kendele S. Galvan ,  John J. Monson ,  Denise M. Burcham ,  Kapil Kandel

    IPC: C10G69/06

    Abstract: Systems and methods are provided for increasing the portion of a pyrolysis tar fraction that can be hydroprocessed by using a physical particle size reduction process on at least a portion of the pyrolysis tar fraction. The physical particle size reduction process can reduce the percentage of particles in the pyrolysis tar fraction that have a particle size of 75 μm or greater, or 50 μm or greater. It has been unexpectedly discovered that at least a portion of the particles having a size of 75 μm or less, or 50 μm or less, can be effectively hydroprocessed to form products of greater value while still reducing or minimizing the amount of fouling or plugging in a hydroprocessing catalyst bed. By increasing the number of particles having a size of 75 μm or less, or 50 μm or less, while selectively removing larger particles from the SCT fraction, a higher yield of hydrocarbon products can be achieved for a feed containing an SCT fraction. This can reduce or minimize the amount of particulates that are disposed of by incineration or another disposal method for fractions that have a lesser value.

    Processes for Upgrading Alkanes and Alkyl Aromatic Hydrocarbons
    4.
    发明申请
    Processes for Upgrading Alkanes and Alkyl Aromatic Hydrocarbons 有权

    公开(公告)号：US20220281783A1

    公开(公告)日：2022-09-08

    申请号：US17745566

    申请日：2022-05-16

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Xiaoying Bao ,  John S. Coleman

    IPC: C07C5/48 ,  B01J21/10 ,  B01J21/04 ,  B01J23/00 ,  B01J23/42 ,  B01J23/14 ,  B01J23/10

    Abstract: Processes for upgrading a hydrocarbon. The process can include introducing, contacting, and halting introduction of a hydrocarbon-containing feed into a reaction zone. The feed can be contacted with a catalyst within the reaction zone to effect dehydrogenation, dehydroaromatization, and/or dehydrocyclization of the feed to produce a coked catalyst and an effluent. The process can include introducing, contacting, and halting introduction of an oxidant into the reaction zone. The oxidant can be contacted with the coked catalyst to effect combustion of the coke to produce a regenerated catalyst. The process can include introducing, contacting, and halting introduction of a reducing gas into the reaction zone. The reduction gas can be contacted with the regenerated catalyst to produce a regenerated and reduced catalyst. The process can include introducing and contacting an additional quantity of the feed with the regenerated and reduced catalyst to produce a re-coked catalyst and additional first effluent.

    Processes and systems for the conversion of hydrocarbons
    10.
    发明授权
    Processes and systems for the conversion of hydrocarbons 有权

    公开(公告)号：US11414362B2

    公开(公告)日：2022-08-16

    申请号：US16979374

    申请日：2019-03-01

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Larry L. Iaccino ,  John S. Coleman ,  James R. Lattner

    IPC: C07C5/32 ,  B01J8/08 ,  C07C13/15 ,  C07C2/42 ,  C07C2/46

    Abstract: A process for endothermic dehydrogenation including contacting a catalyst material in a moving bed reactor having at least one reaction zone, the moving bed reactor comprising a heat exchanger containing a heating medium, wherein the catalyst material and the heating medium do not contact one another, and wherein at least 50% of the delta enthalpy of the at least one reaction zone is provided by the heat exchanger; and contacting a feedstock comprising hydrocarbons with the catalyst material in the at least one reaction zone of the moving bed reactor under reaction conditions to convert at least a portion of the hydrocarbons to a first effluent comprising a product comprising alkenes, alkynes, cyclic hydrocarbons, and/or aromatics.

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