US4064334A
Expired / Lapsed
US
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Process for preparing polyolefins
Assignee: Eneos Corp
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Filing: 1976-07-15
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Granted: 1977-12-20
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Expires: 1996-07-15
Abstract
Abstract According to the present invention, there is provided a process for preparing polyolefins by polymerizing or copolymerizing olefins in the presence of a catalyst consisting of a solid component and an organometallic compound component, characterized in that said solid component is obtained by copulverizing 1. a magnesium halide, 2. a compound represented by the general formula Al(OR)mX 3-m wherein R is alkyl and/or aralkyl having 1 to 20 carbon atoms and may be the same or different, X is halogen and O<m≦3, 3. a tetravalent titanium compound, and 4. a trivalent titanium compound and in that said organometallic compound component is a mixture of 5. a trialkylaluminum and 6. a compound represented by the general formula AlR'nX 3-n wherein R' is alkyl having 1 to 10 carbon atoms and may be the same or different, X is halogen and O<n<3.
Inventors
- 👤 Nobuyuki Kuroda
- 👤 Toru Nakamura
- 👤 Takeichi Shiraishi
- 👤 Kazuo Matsuura
- 👤 Mituji Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:20
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/02; C08F4/022; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
A process for preparing polyolefins by polymerizing or copolymerizing olefins in the presence of a catalyst comprising a solid component and an organometallic compound component, characterized in that said solid component is obtained by copulverizing 1. a magnesium dihalide 2. a compound represented by the general formula Al(OR) m X 3-m wherein R is alkyl and/or aralkyl having 1 to 20 carbon atoms and may be the same or different, X is halogen and 0<m≦3, 3. a tetravalent titanium compound, and 4. a trivalent titanium compound being present in a molar ratio with tetravalent titanium compound (3) of from 50:1 to 1:50 and in that said organometallic compound component is a mixture of
Claim 2
Dependent Claim
113 words
A process for preparing polyolefins by polymerizing or copolymerizing olefins in the presence of a catalyst comprising a solid component and an organometallic compound component, characterized in that said solid component is obtained by copulverizing 1. a magnesium dihalide 2. a compound represented by the general formula Al(OR) m X 3-m wherein R is alkyl and/or aralkyl having 1 to 20 carbon atoms and may be the same or different, X is halogen and 0<m≦3, 3. a tetravalent titanium compound, and 4. a trivalent titanium compound being present in a molar ratio with tetravalent titanium compound (3) of from 50:1 to 1:50 and in that said organometallic compound component is a mixture of
Claim 3
Dependent Claim
52 words
a trialkylaluminum and 6. a compound represented by the general formula AlR' n X 3-n wherein R' is alkyl having 1 to 10 carbon atoms and may be the same or different, X is halogen and 0<n≦3, said compound being present in a molar ratio with trialkylaluminum(5) of from 2:1 to 1000:1.
Claim 4
Dependent Claim
52 words
a trialkylaluminum and 6. a compound represented by the general formula AlR' n X 3-n wherein R' is alkyl having 1 to 10 carbon atoms and may be the same or different, X is halogen and 0<n≦3, said compound being present in a molar ratio with trialkylaluminum(5) of from 2:1 to 1000:1.
Claim 5
Dependent Claim
16 words
A process according to claim 1 wherein the magnesium dihalide is substantially an anhydrous magnesium chloride.
Claim 6
Dependent Claim
33 words
A process according to claim 1 wherein the compound represented by the general formula Al(OR) m X 3-m is Al(OC 2 H 5 ) 3 or Al(OC 2 H 5 ) 2 Cl.
Claim 7
Dependent Claim
33 words
A process according to claim 1 wherein the copulverization is made for 0.5 to 50 hours in an inert gas atmosphere at a temperature in the range of from 0° to 200° C.
Claim 8
Dependent Claim
45 words
A process according to claim 1 wherein the mixing ratio of a magnesium dihalide and a compound represented by the general formula Al(OR) m X 3-m is such that the molar ratio of Mg to Al is in the range of from 1:01 to 1:1.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein the solid component contains 0.5 to 20 weight percent of titanium.
Claim 10
Dependent Claim
46 words
A process according to claim 1 wherein the mixing ratio of a trialkylaluminum and a compound represented by the general formula AlR' n X 3-n is such that the molar ratio of the former to the latter is in the range of from 1:200 to 1:3.
Claim 11
Dependent Claim
32 words
A process according to claim 1 wherein the organometallic compound component is used in an amount corresponding to 0.1 to 1000 moles per mole of a trivalent and a tetravalent titanium compounds.
Claim 12
Dependent Claim
43 words
A process according to claim 1 wherein the polymerization or copolymerization of olefins is conducted at a temperature in the range of from 20° to 120° C and at a pressure in the range of from atmospheric pressure to 70 kg/cm 2 .G.
Claim 13
Dependent Claim
22 words
A process according to claim 1 wherein the polymerization or copolymerization of olefins is conducted with hydrogen added into the polymerization system.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |