C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/643
C08F 10/02 (2006.01) C08F 2/18 (2006.01) C08F 210/16 (2006.01)
Patent
CA 1203050
ABSTRACT OF THE DISCLOSURE Method for the copolymerization of ethylene with C4-C8 alpha-olefins by means of a suspension method in an organic liquid, at a temperature of from 50°C to 70°C, at a pressure of less than about 10 bar, on a Ziegler catalyst constituted by: a) an alkylaluminium or alkylaluminium 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 contain- ing at least one additional compound chosen from the following classes: (i) aliphatic, cycloaliphatic or aromatic liquid hydrocarbons with a boiling point higher than that of ethanol at atmospheric pressure; and (ii) 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 follow- ing characteristics: (1) particle form: spherical with a size of from 1 to 100 microns (2) apparent density of the particles: from 0.1 -to 1 g/ml; (3) alcoholic hydroxyl group content: from 1.5 to 20% by weight; (4) surface area: from 10 to 100 m2/g; (5) porosity from 1.2 to 3.5 ml/g; and (6) pore radius: from 1,000 to 65,000 Angstroms.
429993
Invernizzi Renzo
Ligorati Ferdinando
Anic S.p.a.
Fetherstonhaugh & Co.
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