US4503159A
Expired / Lapsed
US
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Polyolefin polymerization process and catalyst
Assignee: Phillips Petroleum Co
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Filing: 1983-08-19
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Granted: 1985-03-05
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Expires: 2003-08-19
Abstract
Abstract An olefin polymerization catalyst prepared by reacting water with a magnesium dihalide in the presence of a phase transfer catalyst and reacting the resulting hydrated magnesium dihalide with reactants including a benzoic acid ester, an alkoxytitanium compound, an organoaluminum halide and a titanium halide.
Inventors
- 👤 Albert P. Masino
- 👤 Kiplin D. Cowan
- 👤 Gil R. Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
124 words
A process for preparing an olefin polymerization catalyst comprising mixing a magnesium dihalide and a small quantity of added water in a hydrocarbon solvent in the presence of a phase transfer agent and reacting the resulting hydrated magnesium dihalide with reactants comprising a benzoic acid ester and an alkoxytitanium compound to form a first catalyst component, and then reacting said first catalyst component with an organoaluminum halide to form a solid product, then reacting said solid product with a halogenating agent comprising a titanium halide, wherein the amount of added water employed is such that the total moles of water including water originally associated with the magnesium dihalide is in the range of 0.5 to 1.5 times the number of moles of magnesium dihalide.
Claim 2
Dependent Claim
124 words
A process for preparing an olefin polymerization catalyst comprising mixing a magnesium dihalide and a small quantity of added water in a hydrocarbon solvent in the presence of a phase transfer agent and reacting the resulting hydrated magnesium dihalide with reactants comprising a benzoic acid ester and an alkoxytitanium compound to form a first catalyst component, and then reacting said first catalyst component with an organoaluminum halide to form a solid product, then reacting said solid product with a halogenating agent comprising a titanium halide, wherein the amount of added water employed is such that the total moles of water including water originally associated with the magnesium dihalide is in the range of 0.5 to 1.5 times the number of moles of magnesium dihalide.
Claim 3
Dependent Claim
38 words
A process according to claim 1 wherein the phase transfer agent is employed in such an amount that the molar ratio of added water to phase transfer agent is in the range of about 20/1 to about 20,000/1.
Claim 4
Dependent Claim
93 words
A process according to claim 2 wherein said phase transfer agent is a quaternary salt of the formula (R.sub.1 R.sub.2 R.sub.3 R.sub.4 M).sup.+ X.sup.- where R 1 , R 2 , R 3 , and R 4 are the same or different monovalent hydrocarbon radicals selected from among alkyl, alkenyl, aryl, alkaryl, aralkyl and cycloalkyl radicals containing 1 to 25 carbon atoms per radical, M is selected from N, P, Sb and Bi, the total number of carbon atoms is in the range of 15 to 28, and X is a halogen atom.
Claim 5
Dependent Claim
16 words
A process according to claim 3 wherein said phase transfer agent is a quaternary ammonium halide.
Claim 6
Dependent Claim
48 words
A process according to claim 4 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 7
Dependent Claim
20 words
A process according to claim 5 wherein a phenol is also employed in the production of said first catalyst component.
Claim 8
Dependent Claim
17 words
A process according to claim 6 wherein said ester comprises ethyl benzoate and said phenol comprises 4-phenylphenol.
Claim 9
Dependent Claim
20 words
A process according to claim 7 wherein said halogenating agent comprises titanium tetrachloride, HSiCl 3 , and SiCl 4 .
Claim 10
Dependent Claim
24 words
A process according to claim 8 wherein the respective molar ratios of TiCl 4 , HSiCl 3 , and SiCl 4 is about 4/3.3/1.
Claim 11
Dependent Claim
29 words
A process according to claim 9 wherein said phase transfer agent is added to the water and the resulting mixture is added to a hydrocarbon containing MgCl 2 .
Claim 12
Dependent Claim
9 words
A catalyst produced by the process of claim 1.
Claim 13
Dependent Claim
9 words
A catalyst prepared by the process of claim 5.
Claim 14
Dependent Claim
9 words
A catalyst prepared by the process of claim 8.
Claim 15
Dependent Claim
9 words
A catalyst prepared by the process of claim 10.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |