Olefin polymerization catalyst and olefin polymerization method using such catalyst

Abstract

An olefin polymerization catalyst which shows an extremely high activity even at low temperatures and is suited for the production of blow molding polymers, said catalyst comprising a solid component constituted by a chromium compound supported by an inorganic oxide carrier, and an organomagnesium complex compound soluble in the inert hydrocarbons and represented by the general formula: M.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 R.sub.r.sup.3 X.sub.s Y.sub.t (wherein .alpha.>0, .beta.>0, p.gtoreq.0, q.gtoreq.0, r.gtoreq.0, s>0, t.gtoreq.0, 0<(s+t)/(.alpha.+.beta.).ltoreq.1.5 and p+q+r+s+t=m.alpha.+2.beta.; M is an atom selected from the group consisting of aluminum, zinc, boron, beryllium and lithium; m is the valence of M; R.sup.1, R.sup.2 and R.sup.3 may be same or different and represent respectively a hydrocarbon radical having 1 to 20 carbon atoms; X is OSiR.sup.5 R.sup.6 R.sup.7 ; and Y is a radical selected from the group consisting of OR.sup.4, OSiR.sup.5 R.sup.6 R.sup.7, NR.sup.8 R.sup.9 and SR.sup.10, wherein R.sup.5, R.sup.6, R.sup.7, R.sup.8 and R.sup.9 represent respectively a hydrocarbon radical or hydrogen atom, and R.sup.4 and R.sup.10 represent a hydrocarbon radical).

Dependencies are inferred from the claim text.