Polymerization catalysts and processes

Claim 1

A CHEMICAL COMPOSITION COMPRISING A CHEMICALLYBONDED COMPLEX OF AN ALUMINUM ALKOXIDE HAVING FROM 1 TO 12 CARBON ATOMS IN EACH ALKOXIDE RADICAL, AND AN ALUMINUM HALIDE, THE MAJOR PROPORTION OF THE HALIDE BEING FLUORIDE, ANY REMAINDER BEING SELECTED FROM THE GROUP CONSISTING OF CHLORIDE, BROMIDE, AND IODIDE, SAID CHEMICAL COMPOSITION HAVING BEEN PREPARED BY MIXING AN ALUMINA ALKOXIDE HAVING FROM 1 TO 12 CARBON ATOMS IN EACH ALKOXIDE RADICAL WITH AN ALUMINUM HALIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, ALUMINUM BROMIDE, AND ALUMINUM IODIDE IN AN INTIMATE MIXTURE IN MOLAR PROPORTIONS ON THE ORDER OF ABOUT 1 MOLAR PROPORTION OF THE ALUMINUM ALKOXIDE TO FROM ABOUT 0.9 TO 5 MOLAR PROPORTIONS OF THE ALUMINUM HALIDE TO FORM A COMPLEX, DISSOLVING SAID COMPLEX IN A SOLVENT, AND CONTACTING SAID RESULTING DISSOLVED COMPLEX WITH SUFFICIENT FLUORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF BORON TRIFLUORIDE AND HYDROGEN FLUORIDE AT A TEMPERATURE OF FROM -80*C. TO 0*C. AND THEN ALLOWING THE TEMPERATURE TO RISE, TO EFFECT AN IN SITU HALOGEN INTERCHANGE TO CONVERT THE PREDOMINANT PORTION OF THE ALUMINUM HALIDE OF THE ALUMINUM ALKOXIDE-ALUMINUM HALIDE COMPLEX TO ALUMINUM FLUORIDE, AND REMOVING ANY UNREACTED FLUORINATING AGENT AND HALIDE CONTAINING BY-PRODUCT WHEREBY A SOLID ALUMINUM ALKOXIDE-ALUMINA FLUORIDE-ALUMINUM HALIDE COMPLEX IS OBTAINED.