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    • 95. 发明公开
    • OLEFIN POLYMERIZATION PROCESS WITH CONTINUOUS TRANSFER
    • 具有连续转移的烯烃聚合过程
    • EP2920214A1
    • 2015-09-23
    • EP14701950.9
    • 2014-01-21
    • Total Research & Technology Feluy
    • FOUARGE, LouisHORRE, AnneliesNAUWELAERTS, GeertRICHET, MarcWILDERIANE, Pascal
    • C08F10/00C08F2/14C08F2/01
    • C08F2/01C08F2/14C08F210/16C08F210/14C08F2/001C08F10/00C08F4/65927
    • The present invention relates to a process for the preparation of a polyolefin in at least two slurry loop reactors comprising a first loop reactor connected in series with a second loop reactor, comprising the steps of: - introducing one or more olefin reactants, diluents and polymerization catalyst into said first loop reactor, and while circulating said olefin reactants, diluents and polymerization catalyst in said first loop reactor; - polymerizing said one or more olefin reactants to produce a polyolefin slurry comprising liquid diluent and solid olefin polymer particles; - withdrawing polyolefin slurry comprising solid olefin polymer particles and diluent from said first reactor and introducing the withdrawn particles into the second loop reactor, by means of one or more settling legs provided on said first reactor, wherein each settling leg has an inlet connected to the first reactor and an outlet connected to the second reactor by means of a transfer line, - wherein at least one settling leg is continuously open allowing continuous transfer of solid olefin polymer particles from said first loop reactor to said second loop reactor, and wherein the process further comprises the step of controlling the continuous transfer of solid olefin polymer particles from said first loop reactor to said second loop reactor by at least one continuously open settling leg.
    • 本发明涉及在至少两个淤浆环流反应器中制备聚烯烃的方法,该方法包括与第二环流反应器串联的第一环流反应器,该方法包括以下步骤: - 将一种或多种烯烃反应物,稀释剂和聚合 催化剂进入所述第一回路反应器,同时在所述第一回路反应器中循环所述烯烃反应物,稀释剂和聚合催化剂; - 聚合所述一种或多种烯烃反应物以产生包含液体稀释剂和固体烯烃聚合物颗粒的聚烯烃浆料; - 通过设置在所述第一反应器上的一个或多个沉降腿,从所述第一反应器中取出包含固体烯烃聚合物颗粒和稀释剂的聚烯烃浆料,并将所述取出的颗粒引入第二环管反应器中,其中每个沉降腿具有连接到 第一反应器和通过传输管线连接到第二反应器的出口, - 其中至少一个沉降腿连续地打开,允许固体烯烃聚合物颗粒从所述第一环流反应器连续转移到所述第二环流反应器,并且其中该方法 进一步包括通过至少一个连续打开的沉降腿来控制固体烯烃聚合物颗粒从所述第一环管反应器连续转移到所述第二环管反应器的步骤。
    • 100. 发明公开
    • Multistage process for the polymerization of ethylene
    • Mehrstufiges Verfahren zur Polymerisierung von Ethylen
    • EP2746299A1
    • 2014-06-25
    • EP12198087.4
    • 2012-12-19
    • Basell Poliolefine Italia S.r.l.
    • Maus, AndreasMeier, GerhardusCollina, GianniBrita, Diego
    • C08F10/02C08F2/00C08F2/14
    • C08F110/02C08F2/14C08F10/02C08F2/001C08F2500/07C08F2500/12C08F2500/14
    • The present invention relates to a slurry process for preparing an ethylene polymer having a melt flow ratio F/P, which is the ratio among the melt index value measured according to ASTM 1238 condition "F" and the melt index value measured according to ASTM 1238 condition "P" of equal to or lower than 27, carried out in two or more stages of polymerization at temperatures in the range from 60 to 120°C, in which at least two of the said two or more polymerization stages are carried out under different amounts of molecular weight regulator, said process being carried out in the presence of (A) a solid catalyst component comprising Ti, Mg, halogen, having a porosity (P F ), measured by the mercury method and due to pores with radius equal to, or lower than, 1µm, of at least 0.3 cm 3 /g and a surface area determined by BET method, of lower than 100 m 2 /g, and being further characterized by the fact that more than 50% of the titanium atoms are in a valence state lower than 4 and (B) of an organoaluminum compound.
    • 本发明涉及一种用于制备熔体流动比F / P的乙烯聚合物的浆料方法,其是根据ASTM 1238条件“F”测量的熔体指数值与根据ASTM 1238测量的熔体指数值之间的比率 条件“P”等于或低于27,在60至120℃的温度下在两个或更多个聚合阶段进行,其中至少两个所述两个或更多个聚合阶段在 不同量的分子量调节剂,所述方法在(A)包含Ti,Mg,卤素的固体催化剂组分的存在下进行,所述固体催化剂组分具有通过汞法测量的孔隙率(PF),并且由于半径等于 ,或低于1μm,至少0.3cm 3 / g,BET法测定的表面积低于100m 2 / g,进一步的特征在于,超过50%的钛原子为 在低于4和(B)a的价态下 有机铝化合物。