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    Melt flow index response in polyethylene reactors
    1.
    发明授权
    Melt flow index response in polyethylene reactors 有权

    公开(公告)号：US11168157B2

    公开(公告)日：2021-11-09

    申请号：US16209122

    申请日：2018-12-04

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Daniel M. Hasenberg ,  Jeffrey S. Lowell

    IPC: C08F10/02 ,  C08F2/44 ,  C08F210/16

    Abstract: This disclosure provides for polymerization processes of polyolefins wherein the melt index can be regulated. For example, there is provided a process for producing a polyethylene, the process comprising: (1) in a polymerization reactor, contacting (a) a polymerization catalyst, (b) ethylene, (c) an optional α-olefin comonomer, and (d) (x+y) ppm by weight of an antistatic agent on an ethylene basis; and (2) applying reaction conditions to the reaction mixture suitable to produce the polyethylene having a desired set of characteristics, such as desired target melt index. The disclosed polymerization processes allow for production of polyolefins having higher melt indices, and in the alternative to produce polyolefins having a desired target melt index at lower polymerization temperatures.

    Optimized reactor configuration for optimal performance of the aromax catalyst for aromatics synthesis
    2.
    发明授权
    Optimized reactor configuration for optimal performance of the aromax catalyst for aromatics synthesis 有权

    公开(公告)号：US11149211B2

    公开(公告)日：2021-10-19

    申请号：US16860638

    申请日：2020-04-28

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Vincent D. McGahee ,  Daniel M. Hasenberg

    IPC: C10G35/10 ,  C10G59/02 ,  B01J8/06 ,  B01J8/00 ,  C10G59/06 ,  C10G59/00

    Abstract: A naphtha reforming reactor system comprising a first reactor comprising a first inlet and a first outlet, wherein the first reactor is configured to operate as an adiabatic reactor, and wherein the first reactor comprises a first naphtha reforming catalyst; and a second reactor comprising a second inlet and a second outlet, wherein the second inlet is in fluid communication with the first outlet of the first reactor, wherein the second reactor is configured to operate as an isothermal reactor, and wherein the second reactor comprises a plurality of tubes disposed within a reactor furnace, a heat source configured to heat the interior of the reactor furnace; and a second naphtha reforming catalyst disposed within the plurality of tubes, wherein the first naphtha reforming catalyst and the second naphtha reforming catalyst are the same or different.

    2-mercaptoethanol synthesis
    10.
    发明授权
    2-mercaptoethanol synthesis 有权

    公开(公告)号：US10689333B1

    公开(公告)日：2020-06-23

    申请号：US16282769

    申请日：2019-02-22

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Jason L. Kreider ,  Daniel M. Hasenberg ,  Alex Pauwels

    IPC: C07C319/02 ,  B01J29/08

    Abstract: A process comprising reacting, in a reactor having a fixed bed containing a solid catalyst which contains a zeolite, hydrogen sulfide and an oxirane in the presence of the solid catalyst to yield a reaction product with contains a mercapto-alcohol. A reactor system includes the reactor, an oxirane feed stream, a hydrogen sulfide feed stream, a fixed bed containing the solid catalyst placed inside the reactor, and an effluent stream containing the reaction product. The hydrogen sulfide and the oxirane are present in a mole ratio in a range of about 5:1 to 50:1.

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