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AssigneeFina Technology, Inc.
InventorsKayo Vizzini, Henry Enriquez, Steven D. Gray, Tim J. Coffy, David W. Knoeppel
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Disclosed is a process for making a Ziegler-Natta catalyst having controlled particle size and distribution. It comprises altering the precipitation of a catalyst component from a catalyst synthesis solution including a soluble magnesium containing catalyst precursor by controlling the concentration of either the soluble magnesium containing catalyst precursor, wherein the average particle size of the catalyst component is increased, and the particle size distribution increased, with a decreased concentration of the soluble magnesium containing catalyst precursor; or of the precipitating agent, wherein the average particle size of the catalyst component is increased, and the particle size distribution increased with an increased concentration of the precipitating agent. Use of the invention enables improved catalyst consistency regardless of production scale and customizing of catalyst morphology to desired polymer morphology. The novel catalyst components may be used to prepare polymers, and end-use articles therefrom, having desirable properties. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
A process for making a Ziegler-Natta catalyst having controlled particle size and distribution comprising altering the precipitation of a catalyst component from a catalyst synthesis solution including a soluble catalyst precursor and a precipitating agent by controlling the concentration of:
Dependencies are inferred from the claim text.