US4088812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyolefins
Assignee: Eneos Corp
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Filing: 1976-12-20
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Granted: 1978-05-09
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Expires: 1996-12-20
Abstract
Abstract This invention discloses an improved catalyst for the polymerization or copolymerization of olefins, and a process for preparing polyolefins which comprises polymerizing or copolymerizing olefins using the said catalyst. According to the invention there is provided a process for preparing polyolefins by polymerizing or copolymerizing olefins using as a catalyst at least one compound selected from the group consisting of a titanium compound and a vanadium compound supported on a solid carrier, and an organometallic compound, said solid carrier comprising a product obtained by treatment with SO 3 of at least one member selected from the group consisting of an oxide of Group II-IV metals of the Periodic Table and a double oxide of the said oxide and other oxide, which other oxide may be another oxide of Group II-IV metals of the Periodic Table or may be an oxide of other Group metals of the same Table.
Inventors
- 👤 Kazuo Matuura
- 👤 Masaomi Matsuzaki
- 👤 Humiaki Oshimi
- 👤 Nobuyuki Kuroda
- 👤 Mituji Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:53
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
165 words
Process for preparation of polyolefins by polymerizing or copolymerizing olefins in the presence of a catalyst comprising at least one compound selected from the group consisting of a titanium compound and a vanadium compound supported on a solid carrier and an organometallic compound, from metals of Group I-IV of the Periodic Table, said solid carrier consisting of a product containing from 0.1% to 20% by weight of sulfur and obtained by treatment with SO 3 of at least one member selected from the group consisting of (1) a first oxide of group II-IV metals of the Periodic Table, and (2) a second oxide which is a double oxide consisting of two of the said first oxides or a double oxide consisting of said first oxide and an oxide of a metal from a group other than Group II-IV metals, the treatment with sulfur trioxide being conducted for a period of from 1 minute to 24 hours at a temperature from room temperature to 1000° C.
Claim 2
Dependent Claim
165 words
Process for preparation of polyolefins by polymerizing or copolymerizing olefins in the presence of a catalyst comprising at least one compound selected from the group consisting of a titanium compound and a vanadium compound supported on a solid carrier and an organometallic compound, from metals of Group I-IV of the Periodic Table, said solid carrier consisting of a product containing from 0.1% to 20% by weight of sulfur and obtained by treatment with SO 3 of at least one member selected from the group consisting of (1) a first oxide of group II-IV metals of the Periodic Table, and (2) a second oxide which is a double oxide consisting of two of the said first oxides or a double oxide consisting of said first oxide and an oxide of a metal from a group other than Group II-IV metals, the treatment with sulfur trioxide being conducted for a period of from 1 minute to 24 hours at a temperature from room temperature to 1000° C.
Claim 3
Dependent Claim
36 words
Process according to claim 1 wherein said oxide is selected from the group consisting of Al 2 O 3 , MgO, CaO, ZnO, BaO, B 2 O 3 , SiO 2 , and SnO 2 .
Claim 4
Dependent Claim
24 words
Process according to claim 1 wherein said double oxide is selected from the group consisting of magnesia-alumina, silica-alumina, magnesia-silica, magnesia-calcium oxide-alumina, and alumina-calcium oxide.
Claim 5
Dependent Claim
31 words
Process according to claim 1 wherein said oxide or said double oxide is treated with 0.005 to 50 mol. of SO 3 per mol. of said oxide or said double oxide.
Claim 6
Dependent Claim
25 words
A process according to claim 4 wherein 0.01 to 10 mol of SO 3 per mole of said oxide or said double oxide is employed.
Claim 7
Dependent Claim
35 words
Process according to claim 1 wherein homopolymerization of an α-olefin selected from the group consisting of ethylene, propylene and 1-butene or copolymerization of ethylene and propylene, ethylene and 1-butene or propylene and 1-butene is performed.
Claim 8
Dependent Claim
35 words
Process according to claim 1 wherein the polymerization or copolymerization of olefins is effected at a temperature ranging from 20° to 300° C. under a pressure ranging from ordinary pressure to 70 kg/cm 2 .
Claim 9
Dependent Claim
15 words
A process according to claim 7 wherein the temperature is from 50° to 180° C.
Claim 10
Dependent Claim
17 words
A process according to claim 7 wherein the pressure is from 2 to 60 kg/cm 2 .
Claim 11
Dependent Claim
17 words
Process according to claim 1 wherein the polymerization of olefins is effected in the presence of hydrogen.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |