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    Process for preparing ethylene polymers
    3.
    发明公开
    Process for preparing ethylene polymers 失效
    一种用于乙烯聚合物的制备方法。

    公开(公告)号：EP0237294A2

    公开(公告)日：1987-09-16

    申请号：EP87301961.6

    申请日：1987-03-06

    申请人： NIPPON OIL CO. LTD.

    发明人： Tajima, Yoshio ,  Nomiyama, Kazutosi ,  Nishikitani, Yoshinori ,  Kuroda, Nobuyuki ,  Matsuura, Kazuo

    IPC分类号： C08F10/02 ,  C08F4/62 ,  C08F2/00

    CPC分类号： C08F10/02 ,  C08F10/00 ,  C08F110/02 ,  C08F210/16 ,  Y10S526/905 ,  C08F2/34 ,  C08F4/6228 ,  C08F2500/12 ,  C08F2500/14 ,  C08F2500/13 ,  C08F2500/07 ,  C08F2500/11 ,  C08F2500/18 ,  C08F210/08 ,  C08F4/6543 ,  C08F4/69 ,  C08F4/025

    摘要： A process for preparing an ethylene polymer by a two-stage polymerization of ethylene or ethylene and an a-olefin in an inert hydrocarbon at 50-100°C using a coordination polymerization catalyst containing a solid component and an organoaluminum compound, said solid component containing a transition metal compound, which process comprises:

    (a) in a first stage, producing 10-90% by weight based on the total polymer quantity of a polymer having a melt index in the range of 0.0001 to 0.5 g/10 min as measured according to ASTM D 1238-73, Condition E, using as said solid component a solid product obtained by supporting chromium trioxide or a compound which on calcining forms chromium oxide at least partially, on an inorganic oxide carrier followed by calcining, and using as said organoaluminum compound a compound of the general formula
    wherein R is a hydrocarbon radical having 1 to 18 carbon atoms and n is 2 5 n ≦ 100; and
    (b) in a second stage, producing 90-10% by weight based on the total polymer quantity of a polymer having a melt index in the range of 0.01 to 50 g/10 min as measured according to ASTM D 1238-73, Condition E, using as said solid component a solid material containing at least magnesium and titanium, and using as said organoaluminum compound a compound of the general formula AIR'pX 3 - P wherein R' is a hydrocarbon radical having 1 to 20 carbon atoms, X is halogen and/or alkoxy and p is 0

    Alternatively the solid component of (a) also contains magnesium and titanium and step (b) is effected simply by adding the compound of the formula AIR'pX 3 -p after completion of the first stage polymerisation.

    Process for preparing ethylene polymers
    5.
    发明公开
    Process for preparing ethylene polymers 失效
    制备乙烯聚合物的方法

    公开(公告)号：EP0237294A3

    公开(公告)日：1989-01-25

    申请号：EP87301961.6

    申请日：1987-03-06

    申请人： NIPPON OIL CO. LTD.

    发明人： Tajima, Yoshio ,  Nomiyama, Kazutosi ,  Nishikitani, Yoshinori ,  Kuroda, Nobuyuki ,  Matsuura, Kazuo

    IPC分类号： C08F10/02 ,  C08F4/62 ,  C08F2/00

    CPC分类号： C08F10/02 ,  C08F10/00 ,  C08F110/02 ,  C08F210/16 ,  Y10S526/905 ,  C08F2/34 ,  C08F4/6228 ,  C08F2500/12 ,  C08F2500/14 ,  C08F2500/13 ,  C08F2500/07 ,  C08F2500/11 ,  C08F2500/18 ,  C08F210/08 ,  C08F4/6543 ,  C08F4/69 ,  C08F4/025

    摘要： A process for preparing an ethylene polymer by a two-stage polymerization of ethylene or ethylene and an a-olefin in an inert hydrocarbon at 50-100°C using a coordination polymerization catalyst containing a solid component and an organoaluminum compound, said solid component containing a transition metal compound, which process comprises:
    (a) in a first stage, producing 10-90% by weight based on the total polymer quantity of a polymer having a melt index in the range of 0.0001 to 0.5 g/10 min as measured according to ASTM D 1238-73, Condition E, using as said solid component a solid product obtained by supporting chromium trioxide or a compound which on calcining forms chromium oxide at least partially, on an inorganic oxide carrier followed by calcining, and using as said organoaluminum compound a compound of the general formula
    wherein R is a hydrocarbon radical having 1 to 18 carbon atoms and n is 2 5 n ≦ 100; and (b) in a second stage, producing 90-10% by weight based on the total polymer quantity of a polymer having a melt index in the range of 0.01 to 50 g/10 min as measured according to ASTM D 1238-73, Condition E, using as said solid component a solid material containing at least magnesium and titanium, and using as said organoaluminum compound a compound of the general formula AIR'pX 3 - P wherein R' is a hydrocarbon radical having 1 to 20 carbon atoms, X is halogen and/or alkoxy and p is 0 Alternatively the solid component of (a) also contains magnesium and titanium and step (b) is effected simply by adding the compound of the formula AIR'pX 3 -p after completion of the first stage polymerisation.