US4451688A
Expired / Lapsed
US
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Process for preparing polyolefins
Assignee: Eneos Corp
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Filing: 1982-09-01
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Granted: 1984-05-29
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Expires: 2002-09-01
Abstract
Abstract Olefins are polymerized in the presence of a catalyst which comprises the combination of: [I] a solid substance obtained by the reaction of at least the following two components: (i) a magnesium compound represented by the general formula R 1 m (OR 2 ) n MgX 2-m-n wherein R 1 and R 2 are each a hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, m is 0≦m≦2 and n is 0≦n≦2, provided 0≦m+n≦2, and (ii) a titanium compound and/or a vanadium compound; [II] a silicon compound represented by general formula R 1 mSi(OR 2 ) n X 4-m-n wherein R 1 and R 2 are each hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, m is 0≦m<4 and n is 0<n≦4, provided 0 m+n 4; [III] an organometallic compound, where said catalyst comprises a product obtained by pre-reacting said silicon compound (II) and said organometallic compound (III).
Inventors
- 👤 Nobuyuki Kuroda
- 👤 Toru Nakamura
- 👤 Yutaka Shikatani
- 👤 Kazuo Matsuura
- 👤 Mituji Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:32
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
A process for preparing a polyolefin, characterized by polymerizing at least one olefin in the presence of a catalyst, said catalyst comprising the combination of: [I] a solid substance obtained by the reaction of at least the following two components: (i) at least one magnesium compound represented by the general formula R 1 m (OR 2 ) n MgX 2-m-n wherein R 1 and R 2 are each a hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, m is 0≦m≦2 and n is 0≦n≦2, provided 0≦m+n≦2, and (ii) a titanium compound and/or a vanadium compound; [II] a silicon compound represented by general formula R' m Si(OR") n X 4-m-n wherein R' and R" are each hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, m is 0≦m<4 and n is 0<n≦4, provided 0<m+n≦4; and [III] an organometallic compound, wherein said catalyst comprises a product obtained by pre-reacting said silicon compound [II] and said organometallic compound [III].
Claim 2
Dependent Claim
165 words
A process for preparing a polyolefin, characterized by polymerizing at least one olefin in the presence of a catalyst, said catalyst comprising the combination of: [I] a solid substance obtained by the reaction of at least the following two components: (i) at least one magnesium compound represented by the general formula R 1 m (OR 2 ) n MgX 2-m-n wherein R 1 and R 2 are each a hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, m is 0≦m≦2 and n is 0≦n≦2, provided 0≦m+n≦2, and (ii) a titanium compound and/or a vanadium compound; [II] a silicon compound represented by general formula R' m Si(OR") n X 4-m-n wherein R' and R" are each hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, m is 0≦m<4 and n is 0<n≦4, provided 0<m+n≦4; and [III] an organometallic compound, wherein said catalyst comprises a product obtained by pre-reacting said silicon compound [II] and said organometallic compound [III].
Claim 3
Dependent Claim
13 words
The process of claim 1, wherein said magnesium compound is a magnesium halide.
Claim 4
Dependent Claim
38 words
The process of claim 1, wherein said solid substance [I] is prepared in the presence of at least one member selected from the group consisting of organic halides, halogenating agents, phosphoric esters, electron donors and polycyclic aromatic compounds.
Claim 5
Dependent Claim
24 words
The process of claim 1, wherein said solid substance [I] is supported on an oxide of a Group II-IV metal in the Periodic Table.
Claim 6
Dependent Claim
26 words
The process of claim 1, wherein the titanium and/or vanadium content in said solid substance [I] is in the range of 0.5 to 20 weight percent.
Claim 7
Dependent Claim
37 words
The process of claim 1, wherein the amount of said silicon compound [II] is in the range of 0.1 to 100 moles per mole of the titanium compound and/or the vanadium compound in said solid substance [I].
Claim 8
Dependent Claim
18 words
The process of claim 1, wherein said organometallic compound [III] is an organoaluminum compound or an organozinc compound.
Claim 9
Dependent Claim
17 words
The process of claim 1, wherein said olefin is an α-olefin having 2 to 12 carbon atoms.
Claim 10
Dependent Claim
38 words
The process of claim 1, wherein the polymerization reaction is carried out at a temperature in the range of 20° to 120° C. and at a pressure in the range of atmospheric pressure to 70 kg/cm 2 .
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |