Polymerization processes
AssigneeChevron Chemical Company
InventorsGene E. Kellum, Robert L. Batchelor
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Abstract
A polymerization process is provided comprising contacting under polymerization conditions a catalyst, a taming agent, ethylene and optionally a comonomer, wherein the catalyst comprises chromium oxide, titanium oxide and an inorganic refractory oxide, wherein the taming agent is selected from the group consisting of water, alcohols, aldehydes, ketones, esters, and organic acids and mixtures thereof. The process is especially suited for polymerizing ethylene resins suitable for blow molding use.
Claims21
A polymerization process comprising contacting under polymerization conditions a catalyst, a taming agent, ethylene and optionally an olefin containing from 3 to 8 carbon atoms:
- wherein the catalyst comprises chromium oxide, titanium oxide and an inorganic refractory oxide;
- wherein the taming agent is selected from the group consisting of water, aldehydes, ketones, esters, organic acids, methanol, ethanol, n-propanol, isopropanol, butanol, amyl alcohol, hexanol and mixtures thereof;
- and
- wherein the taming agent is present in an amount sufficient to achieve a melt flow ratio of at least 75 units and a melt index from 0.1 to 1.0 units.
A polymerization process comprising contacting under polymerization conditions a catalyst, a taming agent, ethylene and optionally an olefin containing from 3 to 8 carbon atoms:
- wherein the catalyst comprises chromium oxide, titanium oxide and an inorganic refractory oxide;
- and
- wherein the taming agent is selected from the group consisting of water, aldehydes, ketones, esters, organic acids, methanol, ethanol, n-propanol, isopropanol, butanol, amyl alcohol, hexanol and mixtures thereof.
Dependencies are inferred from the claim text.