Catalyst system
AssigneeStandard Oil Company (Indiana)
InventorNikolaous K. Balint
Life of this patent
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Abstract
A propylene polymerization catalyst is formed by incorporation into a catalytic mixture, comprising a transition metal compound and an organoaluminum compound, effective amounts of Group Va or Group VII oxygen mineral acids whereby the amount of n-hexane-soluble polymeric product is decreased.
Claims21
A catalyst composition for the polymerization of propylene or mixtures of propylene and copolymerizable alpha-olefins, which produces low amounts of n-hexane-soluble polymer, comprising a titanium trihalide;
- an organoaluminum compound selected from the group consisting of dialkyl aluminum halide, trialkyl aluminum, a mixture thereof, and a mixture of trialkyl aluminum with alkyl aluminum dihalide;
- and a [Group Va] nitrogen or Group VII oxygen mineral acid in a molar ratio to titanium trihalide from about 0.005 to 1 to about 0.7 to 1.
[5. The catalyst composition of claim 1 wherein the mineral acid is phosphoric acid.]
[6. The catalyst composition of claim 1 wherein
- the mineral acid is phosphorous acid.] 7. The catalyst composition of
- claim 1 wherein the mineral acid is perchloric acid. 8. The catalyst composition of claim 3 wherein the titanium trihalide is titanium trichloride and the organoaluminum compound is diethylaluminum chloride, triethylaluminum, a mixture thereof or a mixture of triethylaluminum with
- ethylaluminum dichloride. 9. The catalyst composition of claim 3 wherein the molar ratio of oxygen mineral acid to titanium tirhalide is about 0.02
- to 1 to about 0.5 to 1. 10. The catalyst composition of claim 4 wherein the molar ratio of nitric acid to titanium trihalide is about 0.2 to 1 to about 0.5 to 1.
[11. The catalyst composition of claim 5 wherein the molar ratio of phosphoric acid to titanium trihalide is about 0.02 to 1 to about 0.5 to 1.]
[12. The catalyst composition of claim 6 wherein the molar ratio of phosphorous acid to titanium trihalide is about 0.02 to 1
- to about 0.5 to 1.] 13. The catalyst composition of claim 7 wherein the molar ratio of perchloric acid to titanium trihalide is about 0.02 to 1 to
- about 0.1 to 1. 14. The catalyst composition of claim 3 wherein the titanium trihalide is titanium trichloride and the organoaluminum compound
- is diethylaluminum chloride. 15. A process for forming a catalyst composition for the polymerization of propylene or mixtures of propylene and copolymerizable alphaolefins, which produces low amounts of n-hexanesoluble polymer, comprising mixing in a suitable medium a titanium trihalide;
- an organoaluminum compound selected from the group consisting of dialkyl aluminum halide, trialkyl aluminum, mixtures thereof, and mixtures of trialkyl aluminum with alkyl aluminum dihalide;
- and a [Group Va] nitrogen or Group VII oxygen mineral acid in a molar
- ratio to titanium trihalide from about 0.005 to 1 to about 0.7 to 1. 16. The process of claim 15 wherein the oxygen mineral acid is added to a solution of organoaluminum compound in an inert hydrocarbon then the resulting mixture is added to a mixture of titanium trihalide in an inert
- hydrocarbon. 17. The process of claim 15 wherein the titanium trihalide is titanium trichloride and the organoaluminum compound is diethylaluminum
- chloride. 18. The process of claim 16 wherein the inert hydrocarbon is
- n-hexane. 19. The process of claim 16 wherein the mineral acid is nitric acid.
[20. The process of claim 15 wherein the mineral acid is phosphoric acid.]
[21. The process of claim 15 wherein the mineral
- acid is phosphorous acid.] 22. The process of claim 15 wherein the mineral acid is perchloric acid.
A catalyst composition for the polymerization of propylene or mixtures of propylene and copolymerizable alpha-olefins, which produces low amounts of n-hexane-soluble polymer, comprising a titanium trihalide;
- a dialkyl aluminum halide;
- and a phosphorous oxygen mineral acid in a molar ratio to titanium trihalide from about 0.005 to 1 to about 0.5 to 1.
A process for forming a catalyst composition for the polymerization of propylene or mixtures of propylene and copolymerizable alpha-olefins, which produces low amounts of n-hexane-soluble polymer, comprising mixing in a suitable medium, a titanium trihalide;
- a dialkyl aluminum halide;
- and a phosphorus oxygen mineral acid in a molar ratio to titanium trihalide from about 0.005 to 1 to about 0.5 to 1.
Dependencies are inferred from the claim text.