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    REACTOR SYSTEM FOR MULTIMODAL POLYETHYLENE POLYMERIZATION
    37.
    发明公开
    REACTOR SYSTEM FOR MULTIMODAL POLYETHYLENE POLYMERIZATION 审中-公开

    公开(公告)号：US20230192913A1

    公开(公告)日：2023-06-22

    申请号：US16332006

    申请日：2017-09-07

    申请人： Thai Polyethylene Co., Ltd. ,  SCG Chemicals Co., Ltd.

    发明人： Piyawan TIYAPIBOONCHAIYA ,  Patcharin SAMPHAWAMONTRI ,  Warachad KLOMKAMOL

    IPC分类号： C08F10/02 ,  C08F2/00 ,  C08F2/18 ,  C08L23/08 ,  C08F2/01

    CPC分类号： C08F10/02 ,  C08F2/001 ,  C08F2/18 ,  C08L23/0815 ,  C08F2/01 ,  C08L2314/02 ,  C08L2207/066 ,  C08L2207/062

    摘要： The present invention relates to a process for producing a multimodal polyethylene composition in the reactor system according to the invention, comprising; (a) polymerizing ethylene in an inert hydrocarbon medium in the first reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and hydrogen in an amount of 0.1-95% by mol with respect to the total gas present in the vapor phase in the first reactor to obtain a low molecular weight polyethylene or a medium molecular weight polyethylene; (b) removing in the hydrogen removal unit 98.0 to 99.8% by weight of the hydrogen comprised in a slurry mixture obtained from the first reactor at a pressure in the range of 103-145 kPa (abs) and transferring the obtained residual mixture to the second reactor; (c) polymerizing ethylene and optionally C4 to C12 α-olefin comonomer in the second reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and in the presence of hydrogen in an amount obtained in step (b) to obtain a first high molecular weight polyethylene or a first ultra high molecular weight polyethylene in the form of a homopolymer or a copolymer and transferring a resultant mixture to the third reactor; and (d) polymerizing ethylene, and optionally α-olefin comonomer in the third reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and hydrogen, wherein the amount of hydrogen in the third reactor is in a range of 1-70% by mol, preferably 1-60% by mol with respect to the total gas present in the vapor phase in the third reactor or optionally substantial absence of hydrogen to obtain a second high molecular weight polyethylene or a second ultra high molecular weight polyethylene homopolymer or copolymer; and a multimodal polyethylene composition obtainable this way.

    FLOATING ARRANGEMENT FOR SUPPORTING SOLAR PANELS
    38.
    发明申请
    FLOATING ARRANGEMENT FOR SUPPORTING SOLAR PANELS 有权

    公开(公告)号：US20220289344A1

    公开(公告)日：2022-09-15

    申请号：US17637400

    申请日：2020-06-16

    申请人： SCG Chemicals Co., Ltd

    发明人： Kok Boon HEH ,  Natthawoot PHUENGNOI ,  Varith PUNTURAUMPORN ,  Natthakarn HEMPANON

    IPC分类号： B63B35/44 ,  B63B1/14 ,  H02S10/40

    摘要： A floating arrangement may include at least one support-floatation-unit for supporting a solar panel, the at least one support-floatation-unit has a main body having a flat base and at least one connection portion; and at least one connecting-floatation-unit having a flat base and at least one connection portion. The respective corner-connection-portions may be coupled together to form a connection joint connecting the support-floatation-unit and the connecting-floatation-unit in a side-by-side arrangement. A height from the base of the support-floatation-unit to the connection joint may be larger than a height from the base of the connecting-floatation-unit to the connection joint such that the base of the support-floatation-unit may extend downwards from the base of the connecting-floatation-unit by a depth which defines an additional displacement volume of the support-floatation-unit configured to provide additional buoyancy to support the solar panel.