US4892852A
Expired / Lapsed
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Transition metal composition
Assignee: BASF SE
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Filing: 1988-04-13
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Granted: 1990-01-09
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Expires: 2008-04-13
Abstract
Abstract A transition metal composition is obtained by reacting the magnesium salt of a cycloalkyl carboxylic acid with a transition metal compound, and optionally a Lewis Base compound. The product may be used to produce an olefin polymerization catalyst by addition of for example an aluminium trialkyl and the resulting catalyst has a high activity and stereospecificity in an olefin polymerization process.
Inventors
- 👤 Roy J. Sampson
- 👤 John W. Kelland
- 👤 Frank T. Kiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:13
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A transition metal composition which is the reaction product of a compound of a transition metal of Group IVA, VA or VIA of the Periodic Table with a magnesium compound of the general formula Mg.sub.x (R(COO).sub.y).sub.z wherein R is unsubstituted cycloalkyl or cycloalkyl substituted with one or more halogen atoms, alkyl groups containing 1 to 6 carbon atoms, or alkoxy groups containing 1 to 6 carbon atoms; and x, y and z are integers such that yz=2x.
Claim 2
Dependent Claim
77 words
A transition metal composition which is the reaction product of a compound of a transition metal of Group IVA, VA or VIA of the Periodic Table with a magnesium compound of the general formula Mg.sub.x (R(COO).sub.y).sub.z wherein R is unsubstituted cycloalkyl or cycloalkyl substituted with one or more halogen atoms, alkyl groups containing 1 to 6 carbon atoms, or alkoxy groups containing 1 to 6 carbon atoms; and x, y and z are integers such that yz=2x.
Claim 3
Dependent Claim
22 words
A composition as claimed in claim 1 wherein the transition metal compound is titanium tetrachloride and the magnesium compound is magnesium cyclohexylcarboxylate.
Claim 4
Dependent Claim
14 words
A composition as claimed in claim 1 which further contains a Lewis Base compound.
Claim 5
Dependent Claim
74 words
A composition as claimed in claim 3 wherein the Lewis Base is of the general formula R.sup.1 .sub.a Ar(COOR.sup.2).sub.b wherein Ar is an aromatic hydrocarbon radical; R 1 is a hydrocarbon radical, a halohydrocarbon radical, a halogen atom or a group OR 3; R 2 is a hydrocarbon radical or a halohydrocarbon radical; R 3 is a hydrocarbon radical or a halohydrocarbon radical; a is zero or an integer; and b is an integer.
Claim 6
Dependent Claim
18 words
A composition as claimed in claim 4 wherein the Lewis Base compound is a di-ester of phthalic acid.
Claim 7
Dependent Claim
52 words
A process for the production of a transition metal composition as claimed claim 1 which comprises reacting, at a temperature of at least 50° C., a compound of a transition metal of Group IVA, VA or VIA of the Periodic Table with a magnesium compound of the general formula: Mg.sub.x [R(COO).sub.y ].sub.z.
Claim 8
Dependent Claim
32 words
A polymerisation catalyst which comprises (A) a transition metal composition as claimed in claim 1, (B) an organic compound of aluminium or of a metal of Group IIA of the Periodic Table.
Claim 9
Dependent Claim
21 words
A catalyst as claimed in claim 7 which further contains a Lewis base in addition to any present in component (A).
Claim 10
Dependent Claim
45 words
A catalyst as claimed in claim 8 which comprises an organic silicon compound containing one or more Si--OR 4 Si--OCOR 4 or Si--NR 4 bonds wherein R 4 is a hydrocarbon radical which may be substituted with one or more halogen atoms and/or oxyhydrocarbon groups.
Claim 11
Dependent Claim
65 words
A catalyst as claimed in claim 9 wherein component A contains an ester of phthalic acid, component (B) is an aluminium trihydrocarbyl compound and the catalyst also includes an organic silicon compound containing one or more Si--OR 4 , Si--OCOR 4 or Si--NR 4 bonds wherein R 4 is a hydrocarbon radical which may be substituted with one or more halogen atoms and/or oxyhydrocarbon groups.
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) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |