US4263422A
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Polymerization of olefins with dual, independently supported catalysts
Assignee: Dow Chemical Co
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Filing: 1979-12-31
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Granted: 1981-04-21
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Expires: 1999-12-31
Abstract
Abstract Alpha-olefins are polymerized in the presence of at least two independently supported catalysts, one of which is an inorganic halide supported titanium and/or vanadium Ziegler type catalyst and at least one other is inorganic oxide supported, chromium catalyst. This dual catalyst increases catalyst efficiency and/or provides more flexible control of the properties of the resulting polymers.
Inventors
- 👤 Kirby Lowery, Jr.
- 👤 Fred L. Vance, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:14
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; C08F16/00; C08F4/00; C08F4/02; C08F110/00; C08F110/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
128 words
In a process for polymerizing one or more α-olefins in the presence of catalytic quantities of a catalyst under conditions appropriate to cause polymerization of said olefins; the improvement which comprises conducting the polymerization in the presence of catalytic quantities of at least two independently supported catalytically active catalysts, one of which is an inorganic halide supported Ziegler type catalyst containing titanium, vanadium or mixture thereof and another of which is an inorganic oxide supported chromium-containing catalyst; said independently supported catalysts being employed in quantities so as to provide a value of Xn in the equation Xn=1-Xm of from about 0.001 to about 0.999 wherein Xn and Xm are the fractional percent polymer yields contributed by the inorganic halide supported catalyst and the inorganic oxide supported catalyst respectively.
Claim 2
Dependent Claim
128 words
In a process for polymerizing one or more α-olefins in the presence of catalytic quantities of a catalyst under conditions appropriate to cause polymerization of said olefins; the improvement which comprises conducting the polymerization in the presence of catalytic quantities of at least two independently supported catalytically active catalysts, one of which is an inorganic halide supported Ziegler type catalyst containing titanium, vanadium or mixture thereof and another of which is an inorganic oxide supported chromium-containing catalyst; said independently supported catalysts being employed in quantities so as to provide a value of Xn in the equation Xn=1-Xm of from about 0.001 to about 0.999 wherein Xn and Xm are the fractional percent polymer yields contributed by the inorganic halide supported catalyst and the inorganic oxide supported catalyst respectively.
Claim 3
Dependent Claim
49 words
The process of claim 1 wherein (1) the polymerization is conducted under solution polymerization conditions, (2) the catalysts are employed in quantities so as to provide a value of Xn of from about 0.01 to about 0.99 and wherein the Ziegler catalyst is supported on a magnesium dihalide support.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein the value for Xn is from about 0.1 to about 0.9.
Claim 5
Dependent Claim
30 words
The process of claim 3 wherein the magnesium dihalide supported Ziegler catalyst contains titanium and one or more transition metal from Groups IVB, VB or VIB of the Periodic Table.
Claim 6
Dependent Claim
29 words
The process of claim 3 wherein the inorganic oxide supported catalyst contains chromium and one or more transition metals from Groups IVB, VB or VIB of the Periodic Table.
Claim 7
Dependent Claim
90 words
The process of claims 1, 2, 3, 4 or 5 wherein (1) the inorganic halide supported Ziegler type catalyst is a magnesium chloride supported titanium tetraalkoxide catalyst reduced with an aluminum-containing compound wherein the atomic ratios of Mg:Ti is from about 0.1:1 to about 200:1; Al:Ti is from about 0.5:1 to about 200:1 and xsCl:Al is from about 0:1 to about 10:1 and (2) the inorganic oxide supported catalyst is supported on silica and contains chromium oxide wherein the atomic ratio of Si:Cr is from about 10:1 to about 1000:1.
Claim 8
Dependent Claim
54 words
The process of claim 6 wherein the atomic ratio of Mg:Ti is from about 1:1 to about 100:1; the atomic ratio Al:Ti is from about 1:1 to about 100:1 the atomic ratio of xsCl:Al is from about 0.05:1 to about 1:1 and the atomic ratio of Si:Cr is from about 20:1 to about 500:1.
Claim 9
Dependent Claim
54 words
The process of claim 7 wherein the atomic ratio of Mg:Ti is from about 10:1 to about 50:1; the atomic ratio Al:Ti is from about 5:1 to about 50:1 the atomic ratio of xsCl:Al is from about 0.1:1 to about 0.4:1 and the atomic ratio of Si:Cr is from about 50:1 to about 200:1.
Claim 10
Dependent Claim
18 words
The process of claims 1, 2, 3, 4 or 5 wherein ethylene is polymerized under solution polymerization conditions.
Claim 11
Dependent Claim
23 words
The process of claim 9 wherein ethylene is copolymerized with at least one other α-olefin having from 3 to about 10 carbon atoms.
Claim 12
Dependent Claim
16 words
The process of claim 10 wherein said other α-olefin is octene-1, hexene-1, butene-1 or mixture thereof.
Claim 13
Dependent Claim
11 words
The process of claim 11 wherein the other α-olefin is octene-1.
Claim 14
Dependent Claim
13 words
The process of claim 6 wherein ethylene is polymerized under solution polymerization conditions.
Claim 15
Dependent Claim
23 words
The process of claim 13 wherein ethylene is copolymerized with at least one other α-olefin having from 3 to about 10 carbon atoms.
Claim 16
Dependent Claim
16 words
The process of claim 14 wherein said other α-olefin is octene-1, hexene-1, butene-1 or mixture thereof.
Claim 17
Dependent Claim
11 words
The process of claim 15 wherein the other α-olefin is octene-1.
Claim 18
Dependent Claim
13 words
The process of claim 7 wherein ethylene is polymerized under solution polymerization conditions.
Claim 19
Dependent Claim
23 words
The process of claim 17 wherein ethylene is copolymerized with at least one other α-olefin having from 3 to about 10 carbon atoms.
Claim 20
Dependent Claim
16 words
The process of claim 18 wherein said other α-olefin is octene-1, hexene-1, butene-1 or mixture thereof.
Claim 21
Dependent Claim
11 words
The process of claim 19 wherein the other α-olefin is octene-1.
Claim 22
Dependent Claim
13 words
The process of claim 8 wherein ethylene is polymerized under solution polymerization conditions.
Claim 23
Dependent Claim
23 words
The process of claim 21 wherein ethylene is copolymerized with at least one other α-olefin having from 3 to about 10 carbon atoms.
Claim 24
Dependent Claim
16 words
The process of claim 22 wherein said other α-olefin is octene-1, hexene-1, butene-1 or mixture thereof.
Claim 25
Dependent Claim
11 words
The process of claim 23 wherein the other α-olefin is octene-1.
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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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |