Catalyst and method of polymerizing

Details Catalyst and method of polymerizing Catalyst and method of polymerizing

B - Operations, Transporting

01

J

252/100, 402/631

B01J 31/26 (2006.01) C08F 4/06 (2006.01)

Patent

CA 1058145

ABSTRACT OF THE DISCLOSURE A new catalyst and a method of polymerizing olefins in which the catalyst is prepared by forming a mixture by dispersing on a finely divided, difficult to reduce, inorganic support of the class consisting of silica, alumina, thoria, zirconia, titania, magnesia and mixtures or composites thereof, an organic chromium compound pyrolytically decomposable in the substantial absence of oxygen to deposit a catalytically active residue along with a carbon residue as a contaminant on the support, then activating the mixture by subjecting the mixture to non-oxidative pyrolysis to and at a temperature within the range of about 600-2000°F., thereby depositing on the support the chromium-bearing residue and carbon residue as a by-product from the pyrolytic decomposition of the organic chromium compound, and subjecting the activated catalyst after this activating to heat and on oxidizing gas such as air, oxygen, carbon dioxide, nitrous oxide, and the like, to burn off a substantial amount of the carbon residue and to modify and improve the characteristics of the activated catalyst.

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