Olefin polymerization processes and products thereof
AssigneePhillips Petroleum Company
InventorsJoel L. Martin, Joseph J. Bergmeister, Eric T. Hsieh, Max P. McDaniel, Elizabeth A. Benham, Steven J. Secora
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Abstract
A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymers and ultra high molecular weight ethylene copolymers. Catalyst systems used are selected from the group consisting of inorganic oxide supported titanium-containing catalyst systems, inorganic oxide supported organo-zirconium catalyst systems and inorganic oxide supported organo-hafnium catalyst systems.
Claims16
A polymerization catalyst composition comprising a compound having the formula:
- MR4,
- wherein
- M is selected from titanium, zirconium or hafnium;
- R in each instance is independently selected from a beta-stable ligand;
- and
- wherein the compound is supported on an aluminum-containing support comprising at least one of fluorided alumina, fluorided/silated alumina, aluminophosphate, or mixtures thereof.
A polymerization catalyst composition comprising a compound having the formula:
- M(CH2XR3)4,
- wherein
- M is selected from titanium, zirconium or hafnium;
- X in each instance is independently selected from carbon, silicon, germanium, tin, or lead;
- and
- R in each instance is independently selected from a saturated or unsaturated hydrocarbon;
- and
- wherein the compound is supported on an aluminum-containing support comprising at least one of fluorided alumina, fluorided/silated alumina, aluminophosphate, or mixtures thereof.
Dependencies are inferred from the claim text.