PROCESS FOR CRISTALLIZING MAGNESIUM-CHLORIDE FOR UTILIZING IN CATALYST COMPOSITIONS

A method for making crystalline magnesium halide particles for use in preparing catalysts usable in the polymerization of alpha olefins, which particles have the formula MgnEmXp.yROH, wherein E is a metal, X is halogen, ROH is an alcohol, n is a number from 0.25 to 6, m is 0 or 1, p is a number from...

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Bibliographische Detailangaben
1. Verfasser:	JOB,ROBERT CHARLES,US
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A method for making crystalline magnesium halide particles for use in preparing catalysts usable in the polymerization of alpha olefins, which particles have the formula MgnEmXp.yROH, wherein E is a metal, X is halogen, ROH is an alcohol, n is a number from 0.25 to 6, m is 0 or 1, p is a number from 2n to (am+2n), where a is the valence of the metal E, and y is a positive number of up to 6, comprises contacting a magnesium compound of the formula MgnEmXp, wherein the various symbols are as defined herein, or precursor(s) thereof, with an alcohol of the formula ROH to form a solution thereof, heating the solution to remove any water present by azeotroping, and contacting the heated solution with an inert hydrocarbon liquid to precipitate crystalline particles. Procatalysts are formed by melting the crystalline particles and adding appropriate amounts of a porous support to the molten particles to form supported particles, and halogenating and treating the supported particles. When the procatalysts are used in conjunction with a cocatalyst, such as an organoaluminum compound, olefin polymers of improved morphology can be produced.