Catalytic materials as for olefin polymerization

Claim 1

A process for the polymerization of olefins, which comprises contacting an olefin with a catalyst prepared by a process comprising: (a) coating a solid, inorganic support material having surface hydroxyl groups with an aluminum compound capable of reacting with said surface hydroxyl groups and having the formula Al(X) a (OR) b , wherein X is R, a is 0-2, b is 1-3, a+b is 3, and R is an alkyl group having from 1 to 8 carbon atoms; (b) calcining the support material having the aluminum compound coated thereon at temperatures of at least 200° F. and up to the decomposition temperature of the support; (c) depositing on the support a chromium-containing compound capable of reacting with said surface hydroxyl groups and comprising an organophosphoryl chromium reaction product of chromium trioxide and an organophosphorus compound of the formula: ##STR3## wherein R is hydrogen, or alkyl, aralkyl, aryl, or cycloalkyl, but at least one R is other than hydrogen; and (d) activating the thus treated support in a non-reducing atmosphere at temperatures of from 800° F. and up to the decomposition temperature of the support.