CATALYST COMPONENTS FOR ALPHA OLEPHINE-POLYMERIZING CATALYSTS AND PROCEDURE FOR MFG. SAME

• Main Author: THOMAS GAROFF
• Format: Patent
• Language: English
• Published: 21.03.1990
• Edition: 5
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

A catalyst component for an alpha-olefin polymerization catalyst (comprising an organoaluminium compound, an external electron donor and a solid catalyst component obtained by reaction of a magnesium-containing compound with a titanium halogen compound) is prepared by the steps of: (a) precipitating a water-soluble magnesium compound from an aqueous solution thereof using an alkali; (b) separating the solid magnesium component and dissolving it in hydrochloric acid; (c) evaporating the resultant solution until dry; (d)heating the salt mixture obtained at 130 to 150 DEG C; (e) dissolving the magnesium component in ethanol; (f) drying the ethanolic solution of the magnesium component by periodic azeotropic distillation; (g) precipitating a solid carrier component from the ethanolic solution; and (h) reacting the solid carrier component with a titanium halogen compound in the presence of an internal electron donor or without an electron donor. h