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    3.
    发明专利
    未知

    公开(公告)号：BR0108587A

    公开(公告)日：2003-04-29

    申请号：BR0108587

    申请日：2001-12-04

    Applicant: BASELL POLIOLEFINE SPA

    Inventor： ARLETTI ARRIGO ,  FAIT ANNA

    IPC: B01J27/138 ,  B01J35/08 ,  B01J37/00 ,  C01F5/30 ,  C08F4/02 ,  C08F4/614 ,  C08F10/00 ,  C08F110/06

    Abstract: A process for preparing spherical support particles used in the preparation of catalytic components for the polymerization of olefins by (a) forming an emulsion of an adduct of a Mg dihalide and a Lewis base compound in a liquid medium, and (b) cooling the emulsion by transferring it into a cooling bath containing a cooling liquid in motion wherein the cooling liquid is moving inside a tubular zone and the ratio Ve/Vref of the velocity (Ve) of the emulsion coming from step (a) to the velocity of the cooling liquid (Vref) of step (b) is between 0.25 and 4. The resulting spherical support particles have a very narrow size distribution and particularly regular morphology.

    4.
    发明专利
    未知

    公开(公告)号：BR0108784A

    公开(公告)日：2002-12-03

    申请号：BR0108784

    申请日：2001-12-10

    Applicant: BASELL POLIOLEFINE SPA

    Inventor： COVEZZI MASSIMO ,  FAIT ANNA ,  BENEDETTO ALMERINDA DI

    IPC: C08F4/654 ,  C08F10/00 ,  C08F110/06

    Abstract: A process is provided for the preparation of a solid catalyst component for the polymerization of olefins, comprising continuously feeding a liquid containing a titanium compound having at least one titanium-halogen bond into a vessel containing a solid comprising a magnesium halide and continuously discharging liquid from the vessel, whereby the concentration of the solid is maintained within the range of between 80 and 300 g/l, and the product between the average residence time of the liquid in the vessel and the concentration of the solid is maintained below 10,000 min*g/l. An advantage of the process is the reduced time and reactor volume necessary to prepare the catalysts, which show good activity and stereospecificity.

    Continuous process for the preparation of solid catalyst components for the polymerisation of alpha-olefins
    5.
    发明专利
    Continuous process for the preparation of solid catalyst components for the polymerisation of alpha-olefins 未知

    公开(公告)号：AU1710402A

    公开(公告)日：2002-06-24

    申请号：AU1710402

    申请日：2001-12-10

    Applicant: BASELL POLIOLEFINE SPA

    Inventor： COVEZZI MASSIMO ,  FAIT ANNA ,  BENEDETTO ALMERINDA DI

    IPC: C08F4/654 ,  C08F10/00 ,  C08F110/06

    Abstract: A process is provided for the preparation of a solid catalyst component for the polymerization of olefins, comprising continuously feeding a liquid containing a titanium compound having at least one titanium-halogen bond into a vessel containing a solid comprising a magnesium halide and continuously discharging liquid from the vessel, whereby the concentration of the solid is maintained within the range of between 80 and 300 g/l, and the product between the average residence time of the liquid in the vessel and the concentration of the solid is maintained below 10,000 min*g/l. An advantage of the process is the reduced time and reactor volume necessary to prepare the catalysts, which show good activity and stereospecificity.

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