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    Low pressure process for preparing low-density polyethylene
    2.
    发明授权
    Low pressure process for preparing low-density polyethylene 有权

    公开(公告)号：US11332552B2

    公开(公告)日：2022-05-17

    申请号：US15598573

    申请日：2017-05-18

    申请人： Chevron Phillips Chemical Company LP

    发明人： Brooke L. Small ,  Lauren M. Kattchee

    IPC分类号： C08F10/06 ,  C08F4/42 ,  C08F110/02 ,  C08F2/06 ,  C08F2/44 ,  C08F4/70 ,  C08K3/08

    摘要： Disclosed are catalyst systems, processes for making the catalyst systems, and processes for polymerizing at least one olefin monomer comprising ethylene to form a low-density polyethylene (LDPE). The polymerization process uses a catalyst system that can include: at least one diimine complex having the formula I: wherein M is Ni, Pd, or Pt; a first activator such as an organoaluminum compound; and a second activator including a solid oxide chemically-treated with an electron withdrawing anion, such as fluoride silica-alumuina. It was discovered that such the complexes could be activated in a manner to provide an active catalyst system that polymerized ethylene to form a low-density polyethylene (LDPE).

    Catalyst components for the polymerization of olefins and catalysts therefrom obtained
    9.
    发明授权
    Catalyst components for the polymerization of olefins and catalysts therefrom obtained 有权
    用于烯烃聚合的催化剂组分及其催化剂

    公开(公告)号：US08940654B2

    公开(公告)日：2015-01-27

    申请号：US13703622

    申请日：2011-06-06

    申请人： Friedhelm Gundert ,  Martin Schneider

    发明人： Friedhelm Gundert ,  Martin Schneider

    IPC分类号： B01J37/00 ,  C08F4/02 ,  C08F4/60 ,  C08F4/00 ,  C08F4/44 ,  C08F4/06 ,  C08F4/42 ,  C08F4/654 ,  C08F10/00

    CPC分类号： C08F4/6546 ,  C08F10/00 ,  C08F110/02 ,  C08F4/6557 ,  C08F4/6567 ,  C08F2500/12 ,  C08F2500/18 ,  C08F2500/24

    摘要： A catalyst component for the polymerization of olefins obtained by: (a) reacting in a inert hydrocarbon suspension medium a Mg(OR1)(OR2) compound, in which R1 and R2 are identical or different and are each an alkyl radical having 1 to 10 carbon atoms, with a tetravalent transition metal compound having at least a Metal-halogen bond, used in amounts such that the molar ratio metal/Mg is from 0.05 to 10, thereby obtaining a solid reaction product dispersed in a hydrocarbon slurry, (b) washing the solid reaction product dispersed in a hydrocarbon slurry with a liquid hydrocarbon, (c) contacting the washed solid reaction product obtained in (b) with a tetravalent titanium compound and (d) contacting the product obtained in (c) with an organometallic compound of a metal of group 1, 2 or 13 of the Periodic Table.

    摘要翻译： 通过以下方法获得的烯烃聚合用催化剂组分：（a）在惰性烃悬浮介质中使Mg（OR1）（OR2）化合物反应，其中R 1和R 2相同或不同，并且各自为具有1至10个 碳原子与具有至少金属 - 卤素键的四价过渡金属化合物的金属/ Mg的摩尔比为0.05至10，从而获得分散在烃浆料中的固体反应产物，（b） 用液态烃洗涤分散在烃浆料中的固体反应产物，（c）将洗涤的（b）中得到的固体反应产物与四价钛化合物接触，和（d）将（c）中得到的产物与有机金属化合物 的元素周期表第1,2或13族的金属。