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    • 7. 发明公开
    • Improvement in multi-step gas-phase polymerization of olefins
    • Mehrstufige Gasphasen-Polymerisation von Olefinen。
    • EP0041796A2
    • 1981-12-16
    • EP81302349.6
    • 1981-05-27
    • MITSUI PETROCHEMICAL INDUSTRIES, LTD.
    • Morita, YoshinoriKato, AkifumiYamamoto, Ryoichi
    • C08F10/00C08F2/34C08F4/62
    • C08F10/00B01J8/26C08F4/62Y10S526/901Y10S526/905C08F2/001C08F4/6545C08F4/651
    • A process for polymerizing olefins in the gaseous phase in separate first and second gas-phase polymerization zones in the presence of a catalyst comprising a transition metal catalyst component and an organometallic compound of a metal of Groups I to H1 of the periodic table and of hydrogen gas while feeding the catalyst-containing polymer formed in the first zone to the second zone through a feed passage, wherein

      ( i) a dilution zone is provided in the feed passage for diluting a feed flow from the first zone, which feed flow comprises a mixture of polymer, catalyst, olefin gas and hydrogen gas, with a fresh supply of olefin gas,
      (ii) a part of the gas phase in said feed flow diluted in the dilution zone is recycled to the first zone, and the remainder is fed into the second zone, and
      (iii) in the second zone, the hydrogen to olefin mole ratio is maintained lower than that in the first zone.
    • 在含有过渡金属催化剂组分和元素周期表第I至III族金属的有机金属化合物和氢气的催化剂存在下,在分离的第一和第二气相聚合区中的气相中使烯烃聚合的方法 气体,同时通过进料通道将形成在第一区域中的含催化剂的聚合物进料到第二区域,其中:(i)在进料通道中设置稀释区,用于稀释来自第一区域的进料流,该进料流包含 聚合物,催化剂,烯烃气体和氢气的混合物,新鲜供应的烯烃气体,...(ii)稀释在稀释区域的所述进料流中的一部分气相再循环到第一区域,其余部分 (iii)在第二区中,氢与烯烃的摩尔比保持低于第一区。