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    • 101. 发明申请
    • Fast Activating Catalyst
    • 快速活化催化剂
    • US20090163681A1
    • 2009-06-25
    • US11963530
    • 2007-12-21
    • Max P. McDanielElizabeth A. BenhamTed CymbalukGeorge Neil
    • Max P. McDanielElizabeth A. BenhamTed CymbalukGeorge Neil
    • C08F4/18
    • C08F10/00B01J21/08B01J23/26B01J35/1019B01J35/1047B01J35/1061B01J37/0207B01J37/036B01J37/06C08F110/02C08F4/025C08F4/78C08F2500/09C08F2500/12C08F2500/17C08F2500/07
    • A method of preparing a catalyst comprising aging a silica support in an alkaline solution to produce an alkaline aged silica support, removing at least a portion of the alkaline solution from the alkaline aged silica support to produce a dried silica support, and activating the silica support to produce a catalyst composition, wherein alkaline aging lowers the surface area of the silica support to less than about 50% of the original value and wherein activation of the silica support is carried out in batches of equal to or greater than about 500 lbs for a time period of less than about 8 hours. A method of preparing a polymer comprising alkaline aging a silica support material, adding chromium to the silica support material prior to the alkaline aging, after the alkaline aging, or both to form a chromium-silica support, rapidly activating the chromium-silica support produce an activated olefin polymerization catalyst, contacting the activated olefin polymerization catalyst with at least one monomer in a reaction zone under conditions suitable to produce a polymer, and recovering the polymer.
    • 一种制备催化剂的方法,包括在碱性溶液中老化二氧化硅载体以产生碱性老化二氧化硅载体,从碱性老化二氧化硅载体除去至少一部分碱性溶液以产生干燥二氧化硅载体,并活化二氧化硅载体 以产生催化剂组合物,其中碱性老化将二氧化硅载体的表面积降低到小于原始值的约50%,并且其中二氧化硅载体的活化以等于或大于约500lb的批次进行,用于 时间段少于约8小时。 一种制备聚合物的方法,其包括使二氧化硅载体材料碱性老化,在碱性老化之前,碱性老化之后向二氧化硅载体材料中加入铬,或者二者形成铬二氧化硅载体,快速活化铬 - 二氧化硅载体产物 活化烯烃聚合催化剂,在适合于生产聚合物的条件下,在反应区中使活化烯烃聚合催化剂与至少一种单体接触,并回收聚合物。
    • 109. 发明授权
    • Ethylene polymerization process
    • 乙烯聚合工艺
    • US5364915A
    • 1994-11-15
    • US950525
    • 1992-09-25
    • Elizabeth A. BenhamMax P. McDaniel
    • Elizabeth A. BenhamMax P. McDaniel
    • C08F4/69C08F4/60C08F10/00C08F10/02C08F4/78
    • C08F10/02
    • A process to produce a polyethylene composition that has less than 2 weight percent fines, based on the weight of said polyethylene composition, and a fluff bulk density greater than 25 pounds per cubic foot, said process comprising polymerizing ethylene in the presence of a trialkylaluminum compound, and a diluent that is essentially saturated with ethylene under slurry polymerization conditions that comprise a polymerization temperature from 104.degree. C. to 116.degree. C., with an activated catalyst system comprising (a) a catalyst support that comprises a silica compound, wherein said catalyst support has a pore volume less than 2 cubic centimeters per gram, (b) a catalyst that comprises a chromium compound, wherein the amount of chromium in said catalyst system is from about 0.1 to about 20 weight percent, wherein said weight percent is based on the total weight of said catalyst and catalyst support, and (c) a fluorine compound, wherein the amount of fluorine used is from about 0.1 to about 20 weight percent, wherein said weight percent is based on the total weight of said catalyst support.
    • 一种制备基于所述聚乙烯组合物重量小于2重量%的细粉和大于25磅/立方英尺的绒毛体积密度的聚乙烯组合物的方法,所述方法包括在三烷基铝化合物存在下聚合乙烯 和在包含聚合温度为104℃至116℃的淤浆聚合条件下基本上用乙烯饱和的稀释剂,其中活化催化剂体系包含(a)包含二氧化硅化合物的催化剂载体,其中所述 催化剂载体具有小于2立方厘米/克的孔体积,(b)包含铬化合物的催化剂,其中所述催化剂体系中的铬的量为约0.1至约20重量%,其中所述重量百分比为基 所述催化剂和催化剂载体的总重量,和(c)氟化合物,其中使用的氟的量为约0.1〜 的20重量%,其中所述重量百分数是基于所述催化剂载体的总重量。