To provide Ziegler/Natta catalyst composition capable of providing a high productivity and stereospecificity, producible in a short time and capable of reducing the amount a titanium- or a chlorine-containing starting material.
This Ziegler/Natta catalyst composition comprises (a) a titanium- containing solid component, (b) an aluminum compound and, as necessary, (c) an electron donative compound. The component (a) is produced by mixing an inorganic compound as a carrier with a solution of a magnesium compound without containing chlorine in an inert solvent, then reacting the resultant mixture with a 1-8C alkanol in an excessive amount of ≥1.3 times based on the magnesium compound at -20 to +80°C under stirring, subsequently mixing the prepared product with a tri- or a tetravalent titanium compound and a carboxylic acid ester as an electron donor without carrying out the purification and extraction thereof, then separating a solid material by filtration, extracting the resultant solid with a solution containing ≥5wt.% titanium tetrachloride in an inert solvent and further washing the solid material with a liquid alkane.
MOLL ULRICH DR
MAC KENZIE IAN DAVID DR
LANGHAUSER FRANZ DR
KOELLE PETER DR
HINGMANN ROLAND DR
SCHWEIER GUENTHER DR
HEMMERICH RAINER DR
KERTH JUERGEN DR
