Patent US4537870A successfully refreshed from Google Patents.
US4537870A
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Polyolefin polymerization process and catalyst
Assignee: Phillips Petroleum Co
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Filing: 1984-07-12
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Granted: 1985-08-27
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Expires: 2004-07-12
Abstract
Abstract A catalyst prepared by reacting a dihalide, such as MgCl 2 ; a titanium compound, such as a titanium tetraalkoxide; and an electron donor to form a first catalyst component; then reacting that component with an organoaluminum halide; then reacting the resulting solid with TiCl 4 ; and then reacting the solid after that step with HSiCl 3 . Also the use of the catalyst in olefin polymerization is disclosed.
Inventors
- 👤 Gil R. Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:11
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
154 words
A process for preparing a catalyst comprising (1) reacting (a) a metal dihalide selected from Groups IIA and IIB, (b) a transition metal compound, wherein the transition metal is selected from Groups IVB and VB transition metals and is bonded to at least one atom selected from the group consisting of oxygen, nitrogen, and sulfur, said atom in turn being bonded to the carbon atom of an organic radical, and (c) at least one electron donor to form a first catalyst component; (2) reacting said first catalyst component with an organoaluminum precipitating agent selected from compounds of the general formula AlR.sub.n X.sub.3-n wherein each R is individually selected from saturated and unsaturated hydrocarbyl radicals containing 1 to 20 carbon atoms per radical, X is halogen, an n is any number such that 1≦n≦2; then (3) reacting the resulting solid with TiCl 4 , and (4) then reacting that resulting solid with HSiCl 3 .
Claim 2
Dependent Claim
154 words
A process for preparing a catalyst comprising (1) reacting (a) a metal dihalide selected from Groups IIA and IIB, (b) a transition metal compound, wherein the transition metal is selected from Groups IVB and VB transition metals and is bonded to at least one atom selected from the group consisting of oxygen, nitrogen, and sulfur, said atom in turn being bonded to the carbon atom of an organic radical, and (c) at least one electron donor to form a first catalyst component; (2) reacting said first catalyst component with an organoaluminum precipitating agent selected from compounds of the general formula AlR.sub.n X.sub.3-n wherein each R is individually selected from saturated and unsaturated hydrocarbyl radicals containing 1 to 20 carbon atoms per radical, X is halogen, an n is any number such that 1≦n≦2; then (3) reacting the resulting solid with TiCl 4 , and (4) then reacting that resulting solid with HSiCl 3 .
Claim 3
Dependent Claim
40 words
A process according to claim 1 wherein said transition metal compound comprises a titanium tetrahydrocarbyloxide of the formula Ti(OR).sub.4 wherein each R is individually selected from an alkyl, cycloalkyl, aryl, alkylaryl or aralkyl radical containing 1 to 2 carbon atoms.
Claim 4
Dependent Claim
13 words
A process according to claim 2 wherein said metal dihalide comprises magnesium dichloride.
Claim 5
Dependent Claim
13 words
A process according to claim 3 wherein said electron donor comprises a phenol.
Claim 6
Dependent Claim
15 words
A process according to claim 4 wherein said electron donor comprises 4-phenyl-phenol and ethyl benzoate.
Claim 7
Dependent Claim
14 words
A process according to claim 6 wherein said transition metal compound is titanium tetra-n-butoxide.
Claim 8
Dependent Claim
14 words
A process according to claim 6 wherein said precipitating agent is ethyl aluminum sesquichloride.
Claim 9
Dependent Claim
27 words
A process according to claim 7 wherein said magnesium dichloride consists essentially of magnesium dichloride having 1 to 1.5 moles of water per mole of magnesium dichloride.
Claim 10
Dependent Claim
27 words
A process according to claim 7 wherein said magnesium chloride consists essentially of magnesium dichloride having 0.2 to 1.5 moles of methanol per mole of magnesium dichloride.
Claim 11
Dependent Claim
9 words
A catalyst produced by the process of claim 8.
Claim 12
Dependent Claim
9 words
A catalyst produced by the process of claim 9.
Claim 13
Dependent Claim
9 words
A catalyst produced by the process of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |