Patent US4151337A successfully refreshed from Google Patents.
US4151337A
Expired / Lapsed
US
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Process for preparing polyolefin
Assignee: Mitsubishi Chemical Corp
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Filing: 1977-05-25
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Granted: 1979-04-24
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Expires: 1997-05-25
Abstract
Abstract Polyolefin is prepared by polymerizing an olefin by using a catalyst system combining an auxiliary catalytic component of an organoaluminum compound and a solid catalytic component obtained by reacting a mixture of a vanadium trichloride ether complex and a titanium trichloride ether complex with an aluminum halide and/or a boron halide.
Inventors
- 👤 Natsuki Kanoh
- 👤 Toru Tanaka
- 👤 Nobuo Enokido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:57
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/14; B01J31/143; B01J27/00; B01J27/06; B01J27/08; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/26; B01J31/36; B01J31/38; C; C08; C08F; C08F10/00; B01J2231/00; B01J2231/10; B01J2231/12; B01J2531/00; B01J2531/40; B01J2531/46; B01J2531/50; B01J2531/56; B01J27/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
155 words
A process for preparing a polyolefin which comprises polymerizing an olefin by using a catalyst system combining an auxiliary catalytic component of an organoaluminum compound and a solid catalytic component obtained by reacting a mixture of a vanadium trichloride ether complex and a titanium trichloride ether complex with an aluminum halide and/or a boron halide in a solvent in which the resultant ether complex of said aluminum halide and/or said boron halide is soluble and said solid catalytic component is insoluble, and separating the resultant precipitate containing said solid catalytic component; wherein the olefin is ethylene or a mixture of ethylene and an α-olefin comonomer having from 3 to 12 carbon atoms, in a ratio such that the resulting copolymer contains less than 10 wt. % of said comonomer units; and wherein the molar ratio of the vanadium trichloride ether complex to the titanium trichloride ether complex is in the range of 0.001 to 3,000.
Claim 2
Dependent Claim
155 words
A process for preparing a polyolefin which comprises polymerizing an olefin by using a catalyst system combining an auxiliary catalytic component of an organoaluminum compound and a solid catalytic component obtained by reacting a mixture of a vanadium trichloride ether complex and a titanium trichloride ether complex with an aluminum halide and/or a boron halide in a solvent in which the resultant ether complex of said aluminum halide and/or said boron halide is soluble and said solid catalytic component is insoluble, and separating the resultant precipitate containing said solid catalytic component; wherein the olefin is ethylene or a mixture of ethylene and an α-olefin comonomer having from 3 to 12 carbon atoms, in a ratio such that the resulting copolymer contains less than 10 wt. % of said comonomer units; and wherein the molar ratio of the vanadium trichloride ether complex to the titanium trichloride ether complex is in the range of 0.001 to 3,000.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the solvent is a halogenated hydrocarbon.
Claim 4
Dependent Claim
23 words
The process of claim 2, wherein said halogenated hydrocarbon is selected from the group consisting of tetrachloromethane, chloroform, dichloroethane, trichloroethane, chlorobutane and chlorobenzene.
Claim 5
Dependent Claim
11 words
The process of claim 3, wherein said halogenated hydrocarbon is 1,2-dichloroethane.
Claim 6
Dependent Claim
13 words
A process according to claim 1 wherein the ether is tetrahydrofuran or tetrahydropyran.
Claim 7
Dependent Claim
20 words
A process according to claim 1 wherein said molar ratio is in a range of more than 200 to 3000.
Claim 8
Dependent Claim
18 words
A process according to claim 1 wherein said molar ratio is in a range of 0.001 to 0.1.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein said molar ratio is in a range of 20 to 200.
Claim 10
Dependent Claim
22 words
A process according to claim 1 wherein said molar ratio is in a range of more than 0.1 to less than 20.
Claim 11
Dependent Claim
23 words
A process according to claim 1 wherein the solid catalytic component is washed with a solvent before combining it with the organoaluminum compound.
Claim 12
Dependent Claim
37 words
The process of claim 1, wherein said aluminum halide and/or boron halide is selected from the group consisting of AlCl 3 , AlBr 3 , AlI 3 , BF 3 , BCl 3 and BBr 3 .
Claim 13
Dependent Claim
37 words
The process of claim 1, wherein the amount of said aluminum halide and/or boron halide is from 1.5 to 10 moles per mole of total Ti and V in said titanium chloride and vanadium chloride ether complexes.
Claim 14
Dependent Claim
14 words
The process of claim 1, wherein said organoaluminum compound is triisobutylaluminum or diethylaluminum chloride.
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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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |