Methods to prepare catalyst compositions comprising small silica support materials
AssigneeUnivation Technologies, LLC
InventorsMaria A. Apecetche, Phuong A. Cao, Michael D. Awe, Ann M. Schoeb-Wolters, Ryan W. Impelman
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Abstract
Methods are provided to prepare a catalyst system that includes at least one titanium compound, at least one magnesium compound, at least one electron donor compound, at least one activator compound, and at least one silica support material, the at least one silica support material having a median particle size in the range of from 20 to 50 microns with no more than 10% of the particles having a size less than 10 microns and no more than 10% of the particles having a size greater than 50 microns and average pore diameter of at least ≧220 angstroms.
Claims21
A method to prepare a catalyst system, the method comprising contacting:
- at least one titanium compound, at least one magnesium compound, and at least one electron donor compound, with
- at least one silica support material, the at least one silica support material having a median particle size in the range of from 20 to 50 microns and an average pore diameter from 220 Angstroms to 265 Angstroms;
- wherein the at least one silica support material has no more than 10% of the particles having a size less than 10 microns and no more than 10% of the particles having a size greater than 50 microns, to produce the catalyst system.
Dependencies are inferred from the claim text.