Preparation of granular stereoregular butene-1 polymers in a fluidized bed

Claim 1

A process for preparing granular stereoregular butene-1 polymers containing at least 80 mol percent of butene-1, and up to 20 mol percent of one or more C 2 to C 6 alpha monoolefins other than butene-1, by continuously polymerizing a monomer charge of butene-1, or butene-1 and one or more C 2 to C 6 alpha monoolefins other than butene-1, in a gas phase fluidized bed process, in the absence of liquid diluent components, by contacting said monomer with a stereospecific olefin polymerization catalyst comprising (A) an organometallic compound and (B) a transition metal compound, said organometallic compound or said transition metal compound being impregnated in an inert porous carrier when such compound is a liquid, said carrier having an average particle size of from about 0.0028 to 0.06 inches, and said impregnated carrier being employed throughout the process, under the following conditions throughout the process: a temperature of 40° to 55° C., a space time yield of 1 to 8 lbs/hour/ft 3 , a total pressure of 80 to 100 psi, a partial pressure of said monomer charge of 30 to 50 psi, an inert gas pressure of 50 to 70 psi, and a hydrogen concentration of 0.1 to 5 mol percent.