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    • 14. 发明授权
    • Continuous process for the preparation of polyolefins having widely
distributed molecular weights
    • 用于制备具有广泛分布分子量的聚烯烃的连续方法
    • US4414369A
    • 1983-11-08
    • US138104
    • 1980-04-07
    • Nobuyuki KurodaTatsuo HorieKazuo MatsuuraKunimichi KuboMituji Miyoshi
    • Nobuyuki KurodaTatsuo HorieKazuo MatsuuraKunimichi KuboMituji Miyoshi
    • C08F10/00C08F2/14C08F4/66
    • C08F10/00Y10S526/905
    • Polyolefins having a wide distribution of molecular weights are prepared in a plural stage process, by initially polymerizing the olefins in the presence of a solvent, hydrogen and a highly active Ziegler type catalyst under pressure, and beneath a gas phase containing an inert gas, to form in the first stage a polymer having a relatively high molecular weight. The polymerization reaction mixture from the first stage is continuously flowed to a second stage reactor. The second stage reactor is maintained at a relatively lower pressure, such that the flow is driven by the higher pressure in the first stage. The second stage is agitated and the polymerization reaction mixture is maintained beneath an atmosphere containing olefins and hydrogen gas. Polymers of relatively low molecular weight are formed in the second stage. The product continuously removed from the second stage contains a polymer having a wide distribution of molecular weight.
    • 通过在溶剂,氢气和高活性齐格勒型催化剂的存在下,在压力下,在含有惰性气体的气相之下,在烯烃存在下,首先使烯烃聚合,在多级方法中制备分子量分布广泛的聚烯烃, 在第一阶段形成具有相对较高分子量的聚合物。 将来自第一阶段的聚合反应混合物连续流入第二级反应器。 第二级反应器保持在相对较低的压力下,使得流在第一级中被较高的压力驱动。 搅拌第二阶段,聚合反应混合物保持在含有烯烃和氢气的气氛下。 在第二阶段形成相对低分子量的聚合物。 从第二阶段连续除去的产物含有分子量分布广泛的聚合物。
    • 16. 发明授权
    • Process for preparing polyolefins
    • 聚烯烃的制备方法
    • US4410670A
    • 1983-10-18
    • US45961
    • 1979-06-06
    • Yoshio TajimaKazuo MatsuuraNobuyuki KurodaMituji Miyoshi
    • Yoshio TajimaKazuo MatsuuraNobuyuki KurodaMituji Miyoshi
    • C08F10/00C08F4/66
    • C08F10/00
    • This invention provides a process for preparing polyolefins using a new catalyst. According to this invention, .alpha.-olefins can be polymerized or copolymerized to have good stereoregularity and at a high activity by the use of such new catalyst. The new catalyst used in this invention consists of [A] a solid component obtained by contacting (1) a magnesium oxide, (2) an aluminum trihalide, (3) a hydroxy compound represented by the general formula ROH wherein R is an organic radical having 1 to 20 carbon atoms and (4) a titanium halide and/or an addition product of a titanium halide and an aromatic carboxylic acid ester, and [B] an organometallic compound and/or an addition product of an organometallic compound and an aromatic carboxylic acid ester; or it consists of the solid component of the above [A], the organometallic compound and/or the addition product of an organometallic compound and an aromatic carboxylic acid ester of the above [B], and [C] an aromatic carboxylic acid ester. The said catalyst is prepared, in one of the most preferred embodiments thereof, by using the solid component of the above [A] which is obtained by first co-pulverizing the compounds of the above (1),(2) and (3), then washing the co-pulverized product with an aromatic compound, separating the liquid phase to give a solid substance (a) and contacting the latter with the compound and/or the addition product of the above (4).
    • 本发明提供使用新催化剂制备聚烯烃的方法。 根据本发明,通过使用这种新的催化剂,α-烯烃可以聚合或共聚以具有良好的立构规整性和高活性。 本发明中使用的新型催化剂由[A]一种固体组分组成,该固体组分通过使(1)氧化镁,(2)三卤化铝,(3)由通式ROH表示的羟基化合物,其中R是有机基团 具有1至20个碳原子和(4)卤化钛和/或卤化钛和芳族羧酸酯的加成产物,和[B]有机金属化合物和/或有机金属化合物和芳族化合物的加成产物 羧酸酯; 或者由上述[A]的固体组分,有机金属化合物和/或上述[B]的有机金属化合物和芳族羧酸酯的加成产物和[C]芳族羧酸酯组成。 所述催化剂在其最优选的实施方案之一中,通过使用上述[A]的固体成分,其是通过首先共混上述(1),(2)和(3)的化合物而获得的, ,然后用芳族化合物洗涤共粉碎产物,分离液相,得到固体物质(a),并使其与上述(4)的化合物和/或加成产物接触。