Group Va and VII oxygen mineral acids as catalyst modifiers
AssigneeStandard Oil Company (Indiana)
InventorNikolaous K. Balint
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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.
Claims15
A polymerization process comprising contacting, under polymerization conditions, propylene or a mixture of propylene and one or more copolymerizable alpha-olefins with a catalyst comprising a titanium trihalide;
- an organoaluminum compound;
- and an effective amount of a [Group Va] nitrogen or a group VII oxygen mineral acid in aqueous solution in a molar ratio to titanium trihalide from about 0.01 to 1 to about 0.7 to 1 whereby the amount of n-hexane soluble polymeric product produced is decreased.
[3. The process of claim 1 wherein the oxygen mineral acid is phosphoric acid, phosphorous
- acid, or perchloric acid.] 4. The process of claim 1 wherein the mineral acid is nitric acid.
[5. The process of claim 1 wherein the mineral acid is phosphoric acid.]
[6. The process of claim 1 wherein the mineral
- acid is phosphorous acid.] 7. The process of claim 1 wherein the mineral
- acid is perchloric acid. 8. The process of claim 2 wherein the organoaluminum compound is diethylaluminum chloride, triethylaluminum, a mixture thereof or a mixture of triethylaluminum with ethylaluminum dichloride.
[9. The process of claim 3 wherein the molar ratio of oxygen mineral acid to titanium trihalide is about 0.02 to 1 to about 0.5 to
- 1.] 10. The process of claim 4 wherein the molar ratio of nitric acid to titanium trihalide is about 0.02 to 1 to about 0.5 to 1.
[11. The process 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 process 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 process of claim 7 wherein the molar ratio of perchloric acid to titanium trihalide is about 0.02 to 1 to about 0.5 to 1.
[14. The process of claim 3 wherein the organoaluminum compound is diethylaluminum dichloride.]
A polymerization process comprising contacting under polymerization conditions, propylene or a mixture of propylene and one or more copolymerizable alpha-olefins with a catalyst comprising a titanium trihalide;
- a dialkyl aluminum halide;
- and a phosphorous mineral acid in aqueous solution in a molar ratio to titanium trihalide from about 0.01 to 1 to about 0.5 to 1.
Dependencies are inferred from the claim text.