Patent US4384982A successfully refreshed from Google Patents.
US4384982A
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Process and catalyst for olefin polymerization
Assignee: Phillips Petroleum Co
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Filing: 1981-05-18
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Granted: 1983-05-24
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Expires: 2001-05-18
Abstract
Abstract A process and catalyst for the polymerization of olefins wherein the catalyst is prepared by reacting scandium, yttrium or rare earth metal halides with certain transition metal compounds, reacting that product with an organometallic compound, and then reacting that product with a halide ion exchanging source.
Inventors
- 👤 Joel L. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:19
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
132 words
A process for producing a catalyst for the polymerization of alpha-olefins comprising (1) reacting at least one metal halide selected from the halides of scandium, yttrium, and rare earth metals having atomic numbers in the range of 57 to 71 with at least one transition metal compound in which the transition metal is titanium and in which the transition metal is bonded to at least one atom selected from the group consisting of oxygen, nitrogen, and sulfur, and said oxygen, nitrogen, and sulfur atoms are in turn bonded to a carbon-containing radical, then (2) reacting the product of (1) with an organometallic compound comprising an organoaluminum compound, and then (3) treating the resulting solid with a halide ion exchanging source comprising at least one of the group consisting of halides of titanium.
Claim 2
Dependent Claim
132 words
A process for producing a catalyst for the polymerization of alpha-olefins comprising (1) reacting at least one metal halide selected from the halides of scandium, yttrium, and rare earth metals having atomic numbers in the range of 57 to 71 with at least one transition metal compound in which the transition metal is titanium and in which the transition metal is bonded to at least one atom selected from the group consisting of oxygen, nitrogen, and sulfur, and said oxygen, nitrogen, and sulfur atoms are in turn bonded to a carbon-containing radical, then (2) reacting the product of (1) with an organometallic compound comprising an organoaluminum compound, and then (3) treating the resulting solid with a halide ion exchanging source comprising at least one of the group consisting of halides of titanium.
Claim 3
Dependent Claim
67 words
A process according to claim 1 wherein said transition metal compound comprises at least one titanium hydrocarbyloxide of the formula Ti(OR) 4 werein each R is individually selected from a hydrocarbyl radical and said organometallic compound is an organoaluminum halide of the formula AlR' n X 3-n where R' is a hydrocarbyl radical containing 1 to 20 carbon atoms, and n is any number such that 1≦n≦2.
Claim 4
Dependent Claim
17 words
A process according to claim 2 wherein said transition metal compound comprises at least one titanium tetralkoxide.
Claim 5
Dependent Claim
34 words
A process according to claim 3 wherein said halide ion exchanging source comprises titanium tetrachloride, said organometallic compound comprises ethylaluminum sesquichloride, and said transition metal compound is selected from titanium tetrabutoxide and titanium tetraethoxide.
Claim 6
Dependent Claim
15 words
A process according to claim 4 wherein said metal halide consists essentially of neodymium trichloride.
Claim 7
Dependent Claim
17 words
A process according to claim 5 wherein said halide ion exchanging source comprises titanium tetrachloride and trichlorosilane.
Claim 8
Dependent Claim
15 words
A process according to claim 4 wherein said metal halide consists essentially of yttrium trichloride.
Claim 9
Dependent Claim
15 words
A process according to claim 4 wherein said metal halide consists essentially of praseodymium trichloride.
Claim 10
Dependent Claim
18 words
A process according to claim 4 wherein said magnesium dichloride is employed in combination with said metal halide.
Claim 11
Dependent Claim
18 words
A process according to claim 9 wherein said metal halide is selected from yttrium trichloride and praseodymium trichloride.
Claim 12
Dependent Claim
17 words
A process according to claim 4 wherein said halide ion exchanging source comprises titanium tetrachloride and trichlorosilane.
Claim 13
Dependent Claim
13 words
A catalyst prepared by a process of claims 1, 2, 3 or 5-11.
Claim 14
Dependent Claim
25 words
A catalyst system comprising a catalyst according to claim 12 and a cocatalyst comprising organometallic compounds of metals of Groups IA, IIA, IIB, and IIIA.
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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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |