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Patent US4323665A successfully refreshed from Google Patents.
US4323665A
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High efficiency catalyst for polymerizing olefins
Assignee: Dow Chemical Co
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Filing: 1980-04-14
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Granted: 1982-04-06
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Expires: 2000-04-14
Abstract
Abstract alpha -Olfins, particularly higher olefins, are polymerized in the presence of a catalyst prepared by reacting (A) tetravalent tianium compounds such as titanium tetraalkoxide, (B) an organoaluminum compound, (C) an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an organoaluminum compound such as triethyl aluminum and, (D) as a halide source, a tetravalent tin compound such as tin tetrachloride. Polymers prepared by this process provide higher efficiencies than polymers prepared from a process utilizing catalysts employing HCl as the halide source.
Inventors
- 👤 Kirby Lowery, Jr.
- 👤 Donald F. Birkelbach
- 👤 Randall S. Shipley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:58
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
146 words
In a process for the polymerization of an α-olefin under the conditions characteristic of Ziegler polymerization wherein the polymerization is conducted in the presence of, as a catalyst for said polymerization, a catalytic reaction product of (A) a tetravalent titanium compound, (B) an organoaluminum compound, (C) an organomagnesium component and (D) a halide source; said catalytic reaction product having atomic ratios of Mg:Ti is from about 1:1 to about 2000:1, Al:Ti is from about 0.1:1 to about 2000:1; excess X:Al is from about 0.0005:1 to about 10:1; the improvement which comprises employing as the halide source in said catalyst, a tetravalent tin halide represented by the formula SnX a R 4-a , wherein X is a halogen, R is a hydrocarbyl or hydrocarbyloxy group and a has a value of 1 to 4 and the atomic ratio of Sn:Mg is from about 0.1:1 to about 2:1.
Claim 2
Dependent Claim
146 words
In a process for the polymerization of an α-olefin under the conditions characteristic of Ziegler polymerization wherein the polymerization is conducted in the presence of, as a catalyst for said polymerization, a catalytic reaction product of (A) a tetravalent titanium compound, (B) an organoaluminum compound, (C) an organomagnesium component and (D) a halide source; said catalytic reaction product having atomic ratios of Mg:Ti is from about 1:1 to about 2000:1, Al:Ti is from about 0.1:1 to about 2000:1; excess X:Al is from about 0.0005:1 to about 10:1; the improvement which comprises employing as the halide source in said catalyst, a tetravalent tin halide represented by the formula SnX a R 4-a , wherein X is a halogen, R is a hydrocarbyl or hydrocarbyloxy group and a has a value of 1 to 4 and the atomic ratio of Sn:Mg is from about 0.1:1 to about 2:1.
Claim 3
Dependent Claim
64 words
The process of claim 1 wherein the halide source is a tin tetrahalide, the organoaluminum compound is a trialkyl aluminum and wherein the catalytic reaction product has the following atomic ratios: Mg:Ti is from about 5:1 to about 200:1; Al:Ti is from about 0.5:1 to about 200:1; Sn:Mg is from about 0.25:1 to about 1.5:1; excess X:Al is from about 0.002:1 to about 2:1.
Claim 4
Dependent Claim
65 words
The process of claim 2 wherein the halide source is tin tetrachloride, the organoaluminum compound is triethyl aluminum or triisobutyl aluminum and wherein the catalytic reaction product has the following atomic ratios: Mg:Ti is from about 5:1 to about 75:1; Al:Ti is from about 1:1 to about 75:1; Sn:Mg is from about 0.5:1 to about 1:1; excess X:Al is from about 0.01:1 to about 1.4:1.
Claim 5
Dependent Claim
13 words
The process of claim 3 wherein the organomagnesium compound is a dihydrocarbyl magnesium.
Claim 6
Dependent Claim
21 words
The process of claim 4 wherein the dihydrocarbyl magnesium is n-butyl-sec-butyl magnesium di-n-hexyl magnesium, ethyl-n-butyl magnesium, di-isopropyl magnesium, or ethyl-n-hexyl magnesium.
Claim 7
Dependent Claim
40 words
The process of claim 3 wherein the organomagnesium component is a complex of a dialkyl magnesium and a trialkyl aluminum wherein the atomic ratio of Mg:Al in said complex is within the range of from about 0.3:1 to about 1000:1.
Claim 8
Dependent Claim
13 words
The process of claim 6 wherein the complex is di-n-butyl magnesium.1/6 triethyl aluminum.
Claim 9
Dependent Claim
20 words
The process of claims 1, 2, 3, 4, 5, 6 or 7 wherein component (A) is a tetrahydrocarbyloxy titanium compound.
Claim 10
Dependent Claim
13 words
The process of claim 8 wherein the tetravalent titanium compound is tetraiso-propoxy titanium.
Claim 11
Dependent Claim
33 words
The process of claims 1, 2, 3, 4, 5, 6 or 7 wherein said α-olefin is ethylene or a mixture of ethylene and one or more higher α-olefins and/or other ethylenically polymerizable compound.
Claim 12
Dependent Claim
22 words
The process of claim 10 wherein said α-olefin is a mixture of ethylene and at least one of butene-1, hexene-1 or octene-1.
Claim 13
Dependent Claim
26 words
The process of claim 8 wherein said α-olefin is ethylene or a mixture of ethylene and one or more higher α-olefins and/or other ethylenically polymerizable compound.
Claim 14
Dependent Claim
22 words
The process of claim 12 wherein said α-olefin is a mixture of ethylene and at least one of butene-1, hexene-1 or octene-1.
Claim 15
Dependent Claim
26 words
The process of claim 9 wherein said α-olefin is ethylene or a mixture of ethylene and one or more higher α-olefins and/or other ethylenically polymerizable compound.
Claim 16
Dependent Claim
22 words
The process of claim 14 wherein said α-olefin is a mixture of ethylene and at least one of butene-1, hexene-1 or octene-1.
Claim 17
Dependent Claim
21 words
The process of claims 1, 2, 3, 4, 5, 6 or 7 wherein said process is conducted under solution polymerization conditions.
Claim 18
Dependent Claim
14 words
The process of claim 8 wherein said process is conducted under solution polymerization conditions.
Claim 19
Dependent Claim
14 words
The process of claim 9 wherein said process is conducted under solution polymerization conditions.
Claim 20
Dependent Claim
14 words
The process of claim 19 wherein said process is conducted under solution polymerization conditions.
Claim 21
Dependent Claim
14 words
The process of claim 11 wherein said process is conducted under solution polymerization conditions.
Claim 22
Dependent Claim
14 words
The process of claim 12 wherein said process is conducted under solution polymerization conditions.
Claim 23
Dependent Claim
14 words
The process of claim 13 wherein said process is conducted under solution polymerization conditions.
Claim 24
Dependent Claim
14 words
The process of claim 14 wherein said process is conducted under solution polymerization conditions.
Claim 25
Dependent Claim
14 words
The process of claim 15 wherein said process is conducted under solution polymerization conditions.
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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) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |