Process for preparing a supported catalyst for the stereospecific polymerization of alpha-olefins

Claim 1

A PROCESS FOR THE PREPARATION OF A SUPPORTED CATALYST, SUITABLE FOR THE STEREOSPECIFIC, GASEOUS PHASE POLYMERIZATION OF AN ALPHA-OLEFIN CONTAINING A HALIDE OF A TRANSITION METAL IN A VALENCE STATE IMMEDIATELY BELOW ITS MAXIMUM VALENCE STATE AND AT LEAST ONE METAL ALKYL COMPOUND OF THE TYPE RMMXN WHERE IS A METAL SELECTED FROM THE GROUP CONSISTING OF THE FIRST, SECOND AND THIRD GROUPS OF THE MENDELEEF PERIODIC TABLE, R IS A HYDROCARBON HAVING 1 TO 10 CARBON ATOMS, X IS A HALOGEN SELECTED FROM TEH GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE, M IS AN INTEGER FROM 1 TO 3, N IS AN INTEGER FROM 0 TO 1, AND M+N IS THE VALANCE OF M, WHEREIN SAID HALIDE OF THE TRANSITION METAL IN THE VALENCE STATE IMMEDIATELY BELOW ITS MAXIMUM IS OBTAINED BY REACTING AT A TEMPERATURE OF FROM 20* TO 160*C. AN EXCESS OF THE HALIDE OF THE TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TRANSITION METALS FROM GROUP IVB, VI AND VIB OF THE MENDELEEF PERIODIC TABLE IN ITS MAXIMUM VALENCE STATE WITH 0.5 TO 3 G. FOR 100 G. SUPPORT OF AN ORGANOMETALLIC COMPOUND IMPREGNATED ON A SOLID INORGANIC ANHYDROUS SALT SUPPORT COMPOUND WHICH IS INERT TOWARDS THE CATALYST COMPONENTS AND HAS A MELTING POINT HIGHER THAN 400*C. SELECTED FROM THE GROUP CONSISTING OF SUPPORT COMPOUNDS WHICH ARE SOLUBLE IN WATER AND SUPPORT COMPOUNDS WHICH ARE SOLUBLE IN THE WASHING AGENTS FOR THE ALPHA-OLEFIN POLYMER, HEATING TO A TEMPERATURE OF FROM 50*C. TO 400:C. THE RESULTING REACTION MIXTURE, AND SUBSEQUENTLY ADDING A FURTHER AMOUNT OF A METAL ALKYL COMPOUND TO FORM THE CATALYST.