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    • 7. 发明授权
    • Method of preparing low-density ethylene copolymers
    • 制备低密度乙烯共聚物的方法
    • US4481342A
    • 1984-11-06
    • US498370
    • 1983-05-26
    • Renzo InvernizziFerdinando Ligorati
    • Renzo InvernizziFerdinando Ligorati
    • C08F4/00C08F2/14C08F2/18C08F4/60C08F4/654C08F210/00C08F210/16C08F4/02C08F210/02
    • C08F210/16
    • Method for the copolymerization of ethylene with C.sub.4 -C.sub.8 alpha-olefins by means of a suspension method in an organic liquid, at a temperature of from 50.degree. C. to 70.degree. C., at a pressure of less than about 10 bar, on a Ziegler catalyst constituted by:(a) an alkylaluminum or alkylaluminum halide;(b) the product of the reaction of a halogenated derivative of titanium with a support material; the support material being the solid, spheroidal product of the spray drying of a solution of magnesium chloride in ethanol containing at least one additional compound chosen from the following classes:aliphatic, cycloaliphatic or aromatic liquid hydrocarbons with a boiling point higher than that of ethanol at atmospheric pressure;polar, organic hydroxy or ester compounds which are solid or liquid with a boiling point higher than that of ethanol at atmospheric pressure; the solid, spheroidal, spray-dried product also having the following characteristics:particle form: spherical with a size of from 1 to 100 microns.Apparent density of the particles: from 0.1 to 1 g/ml;alcoholic hydroxyl group content: from 1.5 to 20% by weight;surface area: from 10 to 100 m.sup.2 /g;porosity from 1.2 to 3.5 ml/g;pore radius: from 1,000 to 65,000 Angstroms.
    • 乙烯与C 4 -C 8α-烯烃通过悬浮法在有机液体中,在50℃至70℃的温度,小于约10巴的压力下共聚合的方法, 齐格勒催化剂由以下组成:(a)烷基铝或卤化烷基铝; (b)钛的卤化衍生物与载体材料的反应产物; 载体材料是将氯化镁在乙醇中的溶液喷雾干燥的固体,球形产物,其含有至少一种选自以下类别的另外的化合物:沸点高于乙醇的脂族,脂环族或芳族液体烃 气压; 在大气压下沸点高于乙醇的固体或液体的极性有机羟基或酯化合物; 固体,球状,喷雾干燥的产品也具有以下特征:颗粒形式:具有1至100微米尺寸的球形。 颗粒的表观密度:0.1至1g / ml; 醇羟基含量:1.5〜20重量%; 表面积:10〜100m2 / g; 孔隙率为1.2〜3.5ml / g; 孔半径:从1000到65000埃。