US4492768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin polymerization process and catalyst
Assignee: Phillips Petroleum Co
•
Filing: 1983-08-19
•
Granted: 1985-01-08
•
Expires: 2003-08-19
Abstract
Abstract A catalyst and its method of preparation and use involving reacting a magnesium dihalide, an alkoxytitanium compound and water, followed by reaction with an organoaluminum compound and then with a halide ion exchanging source.
Inventors
- 👤 Gil R. Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
107 words
A process for preparing an olefin polymerization catalyst comprising reacting an alkoxytitanium compound, a phenol, and a small quantity of water in a hydrocarbon liquid, then reacting the resulting solution with a magnesium dihalide having less than 1.5 moles of water per mole of magnesium dihalide to form a first catalyst component solution, then reacting that solution with an organoaluminum halide to form a solid product, and then reacting said solid product with a halogenating agent comprising a titanium halide, wherein the amount of water employed in forming said first catalyst component solution is such that the catalyst is more active than if no water were employed.
Claim 2
Dependent Claim
107 words
A process for preparing an olefin polymerization catalyst comprising reacting an alkoxytitanium compound, a phenol, and a small quantity of water in a hydrocarbon liquid, then reacting the resulting solution with a magnesium dihalide having less than 1.5 moles of water per mole of magnesium dihalide to form a first catalyst component solution, then reacting that solution with an organoaluminum halide to form a solid product, and then reacting said solid product with a halogenating agent comprising a titanium halide, wherein the amount of water employed in forming said first catalyst component solution is such that the catalyst is more active than if no water were employed.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein said magnesium dihalide has less than 1 mole of water per mole of magnesium dihalide.
Claim 4
Dependent Claim
48 words
A process according to claim 2 wherein said magnesium dihalide comprises magnesium dichloride, said alkoxytitanium compound comprises a compound of the formula Ti(OR) 4 wherein each R is individually selected from alkyl groups containing 1 to 20 carbon atoms, and wherein said organoaluminum halide comprises ethyl aluminum sesquichloride.
Claim 5
Dependent Claim
24 words
A process according to claim 3 wherein said halogenating agent comprises a mixture of TiCl 4 , HsiCl 3 , and SiCl 4 .
Claim 6
Dependent Claim
30 words
A process according to claim 4 wherein the combined volumes of the HSiCl 3 and SiCl 4 in the halogenating agent is equal to the volume of TiCl 4 .
Claim 7
Dependent Claim
50 words
A process according to claim 4 wherein said magnesium dihalide has less than 0.1 mole of water associated with each mole of magnesium dihalide and the molar ratio of water added in making said first catalyst component solution to the titanium compound is in the range of 1/1 to 5/1.
Claim 8
Dependent Claim
24 words
A process according to claim 6 wherein said magnesium dihalide has less than 0.05 mole of water associated with each mole of magnesium dihalide.
Claim 9
Dependent Claim
22 words
A process according to claim 7 wherein said phenol is selected from the group consisting of 4-phenyl phenol, p-cresol, phenol and p-sec-butylphenol.
Claim 10
Dependent Claim
18 words
A process according to claim 8 wherein ethylbenzoate is also employed in making said first catalyst component solution.
Claim 11
Dependent Claim
12 words
A process according to claim 9 wherein said phenol is 4-phenyl phenol.
Claim 12
Dependent Claim
9 words
A catalyst produced by the process of claim 1.
Claim 13
Dependent Claim
9 words
A catalyst produced by the process of claim 6.
Claim 14
Dependent Claim
13 words
A catalyst according to claim 12 wherein said alkoxytitanium compound comprises titanium tetra-n-butoxide.
Claim 15
Dependent Claim
27 words
A catalyst produced by the process of claim 6 wherein said alkoxytitanium compound comprises titanium tetra-n-butoxide, 4-phenyl phenol is employed, and the precipitating agent comprises ethylaluminum sesquichloride.
References Cited (Backward Citations)
US2984658A
Cited
US3184416A
Cited
US3135809A
Cited
US3177194A
Cited
US3128266A
Cited
US4296223A
Cited
US4143223A
Cited
US4229558A
Cited
US4294721A
Cited
US4394291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |