Multistage method for manufacturing polyolefins
    1.
    发明授权
    Multistage method for manufacturing polyolefins 失效
    制造聚烯烃的多级方法

    公开(公告)号:US06066701A

    公开(公告)日:2000-05-23

    申请号:US959759

    申请日:1997-10-29

    摘要: The present invention provides a method for substantially continuously polymerizing olefins comprising: introducing into a first reaction zone a fresh olefin polymerization catalyst; contacting said fresh olefin polymerization catalyst in said first reaction zone with a first vent mixture at a first feed rate and under conditions sufficient to form and avoid melting a polyolefin, wherein first vent mixture comprises unreacted olefins and a diluent vented from a second reaction zone; withdrawing a vent product of unreacted olefins and diluent from said first reaction zone; withdrawing from said first reaction zone a first product mixture comprising said catalyst and said polyolefin; passing said first product mixture to said second reaction zone; contacting said first product mixture in said second reaction zone with a second vent mixture at a second feed rate and under conditions sufficient to form and avoid melting said polyolefin, wherein said second vent mixture comprises a material selected from the group consisting of a fresh feed and a mixture comprising unreacted olefins and diluent from a third reaction zone; and, withdrawing from said second reaction zone a second product mixture comprising said catalyst and said polyolefin.

    摘要翻译: 本发明提供了一种基本上连续聚合烯烃的方法,包括:将新鲜的烯烃聚合催化剂引入第一反应区; 在第一进料速率和足以形成和避免熔化聚烯烃的条件下使所述第一反应区中的所述新鲜烯烃聚合催化剂与第一排气混合物接触,其中第一排气混合物包含未反应的烯烃和从第二反应区排出的稀释剂; 从所述第一反应区抽出未反应的烯烃和稀释剂的排放产物; 从所述第一反应区抽出含有所述催化剂和所述聚烯烃的第一产物混合物; 将所述第一产物混合物通入所述第二反应区; 使所述第二反应区中的所述第一产物混合物与第二排气混合物以第二进料速率和足以形成和避免熔化所述聚烯烃的条件接触,其中所述第二排气混合物包含选自新鲜进料和 包含来自第三反应区的未反应烯烃和稀释剂的混合物; 并且从所述第二反应区抽出包含所述催化剂和所述聚烯烃的第二产物混合物。

    Multistage method for manufacturing polyolefins
    2.
    发明授权
    Multistage method for manufacturing polyolefins 失效
    制造聚烯烃的多级方法

    公开(公告)号:US06326442B1

    公开(公告)日:2001-12-04

    申请号:US09570946

    申请日:2000-05-15

    IPC分类号: C08F201

    摘要: The present invention provides a method for substantially continuously polymerizing olefins comprising: introducing into a first reaction zone a fresh olefin polymerization catalyst; contacting said fresh olefin polymerization catalyst in said first reaction zone with a first vent mixture at a first feed rate and under conditions sufficient to form and avoid melting a polyolefin, wherein first vent mixture comprises unreacted olefins and a diluent vented from a second reaction zone; withdrawing a vent product of unreacted olefins and diluent from said first reaction zone; withdrawing from said first reaction zone a first product mixture comprising said catalyst and said polyolefin; passing said first product mixture to said second reaction zone; contacting said first product mixture in said second reaction zone with a second vent mixture at a second feed rate and under conditions sufficient to form and avoid melting said polyolefin, wherein said second vent mixture comprises a material selected from the group consisting of a fresh feed and a mixture comprising unreacted olefins and diluent from a third reaction zone; and, withdrawing from said second reaction zone a second product mixture comprising said catalyst and said polyolefin.

    摘要翻译: 本发明提供了一种基本上连续聚合烯烃的方法,包括:将新鲜的烯烃聚合催化剂引入第一反应区; 在第一进料速率和足以形成和避免熔化聚烯烃的条件下使所述第一反应区中的所述新鲜烯烃聚合催化剂与第一排气混合物接触,其中第一排气混合物包含未反应的烯烃和从第二反应区排出的稀释剂; 从所述第一反应区抽出未反应的烯烃和稀释剂的排放产物; 从所述第一反应区抽出含有所述催化剂和所述聚烯烃的第一产物混合物; 将所述第一产物混合物通入所述第二反应区; 使所述第二反应区中的所述第一产物混合物与第二排气混合物以第二进料速率和足以形成和避免熔化所述聚烯烃的条件接触,其中所述第二排气混合物包含选自新鲜进料和 包含来自第三反应区的未反应烯烃和稀释剂的混合物; 并且从所述第二反应区抽出包含所述催化剂和所述聚烯烃的第二产物混合物。