Process for the polymerization of ethylene and interpolymers thereof
AssigneeEastman Chemical Company
InventorsDon Kent Farrer, Kenneth Alan Dooley, Glenn Edward Moore, Larry Allen Noble
Life of this patent
Estimating the term…
Abstract
A novel continuous gas phase polymerization process for producing polyethylene and interpolymers of ethylene and at least one other olefin is provided wherein a saturated halogenated hydrocarbon is used in a specified amount such that the activity of the titanium containing Ziegler-Natta catalyst is increased.
Claims21
A process for increasing catalyst activity in a continuous gas phase process for polymerizing ethylene or ethylene and at least one or more other olefin(s) comprising contacting, under polymerization conditions, the ethylene or ethylene and at least one or more other olefin(s) with a Ziegler-Natta catalyst comprising a titanium component and a co-catalyst component, and at least one or more saturated halogenated hydrocarbon(s) wherein the at least one or more saturated halogenated hydrocarbon(s) is present in a molar ratio of saturated halogenated hydrocarbon(s) to the titanium component of the Ziegler-Natta catalyst from 0.4:1 to about 3.5:1.
A process for increasing catalyst activity in a continuous gas phase process for polymerizing ethylene or ethylene and at least one or more other olefin(s) consisting essentially of contacting, under polymerization conditions, the ethylene or ethylene and at least one or more other olefin(s) with a Ziegler-Natta catalyst comprising a titanium component and a co-catalyst component, and at least one or more saturated halogenated hydrocarbon(s) wherein the at least one or more saturated halogenated hydrocarbon(s) is present in a molar ratio of saturated halogenated hydrocarbon(s) to the titanium component of the Ziegler-Natta catalyst from 0.4:1 to about 3.5:1.
The process according to the molar ratio of saturated halogenated hydrocarbon to the titanium component of the Ziegler-Natta catalyst is from about 2:1 to about 3:1.
Dependencies are inferred from the claim text.