Patent ID: 7402637

Claim:
A method for producing a poly-1-olefin, comprising (A) subjecting a suspension of magnesium alkoxide powder having a mean particle size, expressed as the d 50 value, in the range from 50 to 100 μm to heat treatment at a temperature in the range from 40 to 150° C. over a time period of from 10 to 100 hours; (B) vigorously stirring, using a stirring element, or shearing, using a high-performance shearing tool, the suspension of a magnesium alkoxide powder in an inert hydrocarbon in which the magnesium alkoxide powder are insoluble to obtain a gelatinous dispersion of the magnesium alkoxide; (C) reacting the gelatinuous dispersion of the magnesium alkoxide with a transition-metal compound of titanium, zirconium, vanadium or chromium in an inert hydrocarbon to produce a component (a); (D) forming a catalyst which consists of the product of the reaction of the magnesium alkoxide with the transition-metal compound and an organometallic compound; and (E) polymerization of a 1-olefin of the formula R 4 CH═CH 2 , in which R 4 is hydrogen or an alkyl radical having from 1 to 10 carbon atoms, in suspension, in solution or in the gas phase, at a temperature in the range from 20 to 200° C. and a pressure in the range from 0.5 to 50 bar, in the presence of the catalyst.