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    PROCESS FOR THE PREPARATION OF POLYETHYLENES
    1.
    发明申请
    PROCESS FOR THE PREPARATION OF POLYETHYLENES 审中-公开

    公开(公告)号：WO2020088942A1

    公开(公告)日：2020-05-07

    申请号：PCT/EP2019/078183

    申请日：2019-10-17

    申请人： SABIC GLOBAL TECHNOLOGIES B.V.

    发明人： LI, Lidong ,  AL HUBISH, Salah

    IPC分类号： C08F110/02 ,  C08F10/02 ,  C08F4/659

    摘要： The present invention relates to a process for the production of a polyethylene by polymerisation of a reaction mixture comprising ethylene in the presence a catalyst system and an antistatic agent according to formula I: (I) wherein R1, R2 and R3 stand for a moiety according to formula II or a hydrocarbon moiety having 1 to 20 carbon atoms (II) wherein each of R4, R5 and R6 may be the same or different, and wherein each of R4, R5 and R6 is a hydrocarbon moiety having 1 to 10 carbon atoms, and wherein at least one of R1, R2 and R3 is a moiety according to formula II. Such process allows for the reduction of sheeting in the polymerisation reactor without compromising the polymerisation reaction kinetics.

    OLEFIN POLYMERISATION CATALYST AND PROCESS FOR MANUFACTURING THEREOF
    3.
    发明申请
    OLEFIN POLYMERISATION CATALYST AND PROCESS FOR MANUFACTURING THEREOF 审中-公开

    公开(公告)号：WO2023025474A1

    公开(公告)日：2023-03-02

    申请号：PCT/EP2022/070223

    申请日：2022-07-19

    申请人： SABIC GLOBAL TECHNOLOGIES B.V.

    发明人： BANAT, Yahya ,  LI, Lidong ,  SAIF-AL, Nasser Abdullah ,  AL-SHIBEL, Mohammad

    IPC分类号： C08F4/659 ,  C08F210/16 ,  C08J5/18 ,  C08F4/6592

    摘要： Process for the production of a supported metallocene catalyst system involving the steps of: (i) preparing a mixture (a) by subjecting a quantity of a metallocene compound of together with a quantity of a cocatalyst as solution in a hydrocarbon solvent, preferably at a temperature of 40-80°C for a period of 0.1-2.0 hrs; (ii) preparing a mixture (b) by reacting a quantity of an aluminium compound of formula (II) with a quantity of an amine compound of formula (III) in a hydrocarbon solvent; (II) (III) wherein R6 is hydrogen or a hydrocarbon moiety comprising 1 to 30 carbon atoms; each R7 and R8 are the same or different and are hydrocarbon moieties comprising 1 to 30 carbon atoms; R9 is hydrogen or a functional moiety comprising at least one active hydrogen; R10 is hydrogen or a hydrocarbon moiety comprising 1 to 30 carbon atoms; R11 is a hydrocarbon moiety comprising 1 to 30 carbon atoms; (iii) providing a quantity of a support material, preferably a dehydrated support materials, into a reaction vessel; (iv) providing a quantity of a hydrocarbon solvent into the reaction vessel; (v) supplying the mixture (a) and the mixture (b) to the reaction vessel; (vi) subjecting the contents of the reaction vessel to a temperature of > 60°C for a period of > 3 hrs to obtain a supported catalyst system; and (vii) removing the hydrocarbon solvent from the supported catalyst system. Such process allows for the production of a supported metallocene catalyst system having reduced fouling in olefin polymerisation.