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US 5,331,086 AGranted
Deashing process for polyolefins using an alpha,beta-unsaturated ketone
AssigneePhillips Petroleum Company
InventorsPhil M. Stricklen, Calvin E. Moore, Dennis G. Glascock
Life of this patent
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Abstract
A dicarbonyl compound and an alpha,beta-unsaturated ketone are used to deactivate a transition metal/organometal catalyst in polymerization of at least one monomer to form a 1-olefin polymer. The polymer is deashed with a lower alcohol optionally followed by a wash with the starting monomer or n-heptane.
Claims22
A process for producing at least one polymer of 1-olefins comprising:
- (a) subjecting at least one 1-olefin to polymerization conditions in the presence of a catalyst composition
- wherein said catalyst composition comprises at least one component being a halide of a metal selected from the group consisting of Groups IV, V, VI and VIII of the Periodic Chart of the Elements;
- and
- wherein said catalyst composition further comprises at least one component selected from the group consisting of elemental metal, organometal compounds and mixtures thereof, the metal being selected from Groups I, II and III of the Periodic Chart;
- to form a polymerization reaction mixture having therein said at least one polymer;
- (b) treating said polymerization reaction mixture with a alpha,beta-unsaturated ketone;
- P1 (c) separating said at least one polymer from said reaction mixture.
4 more elements
A process for producing at least one polymer of 1-olefins comprising:
- (a) subjecting at least one 1-olefin to polymerization conditions in the presence of a catalyst composition
- wherein said catalyst composition comprises at least one component being a halide of a metal selected from the group consisting of Groups IV, V, VI and VIII of the Periodic Chart of the Elements;
- and
- wherein said catalyst composition further comprises at least one component selected from the group consisting of elemental mental, organometal compounds and mixtures thereof, the metal being selected from Groups I, II and III of the Periodic Chart;
- to form a polymerization reaction mixture;
- (b) treating said polymerization reaction mixture with deashing agents consisting essentially of at least one alpha,beta-unsaturated ketone and at least one dicarbonyl compound;
- (c) separating said at least one polymer from said reaction mixture.
4 more elements
Dependencies are inferred from the claim text.