Bimetallic catalyst for ethylene polymerization reactions with uniform component distribution
    3.
    发明授权
    Bimetallic catalyst for ethylene polymerization reactions with uniform component distribution 失效
    用于乙烯聚合反应的双金属催化剂具有均匀的组分分布

    公开(公告)号:US06486089B1

    公开(公告)日:2002-11-26

    申请号:US08555816

    申请日:1995-11-09

    IPC分类号: C08F402

    摘要: The invention relates to a process for uniformly dispersing a transition metal metallocene complex on a carrier comprising (1) providing silica which is porous and has a particle size of 1 to 250 microns, having pores which have an average diameter of 50 to 500 Angstroms and having a pore volume of 0.5 to 5.0 cc/g; (2) slurrying the silica in an aliphatic solvent having a boiling point less than 110° C.; (3) providing a volume of a solution comprising metallocene and alumoxane wherein the volume of solution is less than that required to form a slurry of the silica, wherein the concentration of alumoxane, expressed as Al weight percent, is 5 to 20; (4) contacting the silica slurry (2) with said volume of said solution (3) and allowing the solution to impregnate the pores of silica and, to disperse the metallocene in and on the carrier; (5) evaporating the solvents from the contacted and impregnated silica to recover dry free-flowing catalyst particles.

    摘要翻译: 本发明涉及一种将过渡金属茂金属络合物均匀分散在载体上的方法,包括(1)提供多孔的,具有1至250微米的粒径的二氧化硅,具有平均直径为50至500埃的孔, 孔体积为0.5-5.0cc / g;(2)将二氧化硅在沸点小于110℃的脂族溶剂中制浆;(3)提供体积的包含茂金属和铝氧烷的溶液,其中体积为 溶液小于形成二氧化硅浆料所需的溶液,其中铝氧烷的浓度以Al重量百分比表示为5至20; (4)使二氧化硅浆料(2)与所述体积的所述溶液(3)接触,并使所述溶液浸渍二氧化硅的孔隙,并将所述茂金属分散在所述载体上和载体上; (5)从接触和浸渍的二氧化硅蒸发溶剂以回收干燥的自由流动的催化剂颗粒。

    Bimetallic catalyst for ethylene polymerization reactions with uniform component distribution
    4.
    发明授权
    Bimetallic catalyst for ethylene polymerization reactions with uniform component distribution 失效
    用于乙烯聚合反应的双金属催化剂具有均匀的组分分布

    公开(公告)号:US06855654B2

    公开(公告)日:2005-02-15

    申请号:US10244930

    申请日:2002-09-16

    摘要: The invention relates to a process for uniformly dispersing a transition metal metallocene complex on a carrier comprising (1) providing silica which is porous and has a particle size of 1 to 250 microns, having pores which have an average diameter of 50 to 500 Angstroms and having a pore volume of 0.5 to 5.0 cc/g; (2) slurrying the silica in an aliphatic solvent having a boiling point less than 110° C.; (3) providing a volume of a solution comprising the metallocene complex, alumoxane of formulas R—(Al(R)—O—)x—AlR2 for oligomeric linear alumoxanes and (—Al(R)—O—)y for cyclic alumoxanes wherein x is 1-40, y is 3-40, and R is a C1-C8 alkyl group in an aromatic and a solvent wherein the volume of solution is less than that required to form a slurry of the silica, wherein the concentration of alumoxane, expressed as Al weight percent, is 5 to 20; (4) contacting the silica slurry (2) with said volume of said solution (3) and allowing the solution to impregnate the pores of silica and, to disperse the metallocene in and on the carrier; (5)evaporating the solvents from the contacted and impregnated silica to recover dry free-flowing catalyst particles.

    摘要翻译: 本发明涉及一种将过渡金属茂金属络合物均匀分散在载体上的方法,包括(1)提供多孔的,具有1至250微米的粒径的二氧化硅,具有平均直径为50至500埃的孔, 孔体积为0.5-5.0cc / g;(2)将二氧化硅在沸点低于110℃的脂肪族溶剂中制浆;(3)提供体积的包含金属茂配合物的溶液,式 低聚线型铝氧烷的R-(Al(R)-O-)x-AlR2和环状铝氧烷的(-Al(R)-O-)y,其中x为1-40,y为3-40,R为 芳族和溶剂中的C 1 -C 8烷基,其中溶液的体积小于形成二氧化硅浆料所需的体积,其中铝氧烷的浓度以Al重量百分比表示为5至20;(4)接触 二氧化硅浆料(2)与所述溶液(3)的体积一起并使溶液浸渍二氧化硅的孔隙, 在载体上和载体上存在金属茂;(5)从接触和浸渍的二氧化硅中蒸发溶剂以回收干燥的自由流动的催化剂颗粒。

    High activity polyethylene catalysts which produce bimodal or trimodal
product molecular weight distributions
    5.
    发明授权
    High activity polyethylene catalysts which produce bimodal or trimodal product molecular weight distributions 失效
    产生双峰或三峰产物分子量分布的高活性聚乙烯催化剂

    公开(公告)号:US5693583A

    公开(公告)日:1997-12-02

    申请号:US799086

    申请日:1997-02-11

    CPC分类号: C08F10/02 Y02P20/52

    摘要: A catalyst composition for copolymerizing ethylene and alpha-olefins is prepared by treating a silica carrier, in a non-polar hydrocarbon solvent, with a dialkyl magnesium compound, a halogen-containing compound and titanium tetrachloride, to form a catalyst precursor and activating the precursor with dimethylaluminum chloride. Also disclosed is a process for copolymerizing ethylene and alpha-olefins in the presence of the catalyst of the invention. The polymer products have multimodal molecular weight distributions unlike unimodal molecular weight distributions of polymers prepared with similar catalyst precursors but activated with different alkylaluminum activators, e.g., triethylaluminum or trimethylaluminum.

    摘要翻译: 通过用二烷基镁化合物,含卤素化合物和四氯化钛处理非极性烃溶剂中的二氧化硅载体来制备用于共聚乙烯和α-烯烃的催化剂组合物,以形成催化剂前体并活化前体 与二甲基氯化铝。 还公开了在本发明的催化剂存在下共聚乙烯和α-烯烃的方法。 聚合物产物具有多峰分子量分布,不同于用类似的催化剂前体制备的聚合物的单峰分子量分布,但是用不同的烷基铝活化剂例如三乙基铝或三甲基铝活化。

    High-activity polyethylene catalysts
    10.
    发明授权
    High-activity polyethylene catalysts 失效
    高活性聚乙烯催化剂

    公开(公告)号:US5258345A

    公开(公告)日:1993-11-02

    申请号:US979694

    申请日:1992-11-20

    CPC分类号: C08F10/02 Y02P20/52

    摘要: The invention relates to catalysts which produce linear low density polyethylene with a bimodal molecular weight distribution, particularly those containing a high molecular weight fraction. The catalysts are formed by contacting a carrier with an organomagnesium compound to incorporate magnesium into the carrier, and subsequently contacting the carrier containing the incorporated magnesium with a silicon compound and subsequently with a transition metal source; the transition metal containing intermediate is again treated with an organomagesium compound to form a catalyst precursor, and the catalyst precursor is activated with dimethylaluminum chloride.

    摘要翻译: 本发明涉及产生具有双峰分子量分布的线性低密度聚乙烯的催化剂,特别是含有高分子量分数的那些。 催化剂通过使载体与有机镁化合物接触而形成,以将镁引入载体中,随后使含有掺入的镁的载体与硅化合物接触,随后与过渡金属源接触; 再次用有机铵化合物处理含过渡金属的中间体,形成催化剂前体,催化剂前体用氯化二甲基铝活化。