US4027088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing polyolefins
Assignee: Eneos Corp
•
Filing: 1975-07-11
•
Granted: 1977-05-31
•
Expires: 1995-07-11
Abstract
Abstract A process of polymerizing or copolymerizing a class of olefins is carried out in the presence of a catalyst, which catalyst comprises one of more solid compounds selected as a carrier from the group consisting of an oxide, a double oxide and a hydroxide of halogen-free magnesium and/or calcium. The carrier is treated by direct contact with gaseous sulfur dioxide (SO 2 ) under a gaseous atmosphere. A titanium and/or vanadium compound, viz. Ziegler catalyst component, is deposited on the treated carrier and activated by an organometal compound.
Inventors
- 👤 Kazuo Matsuura
- 👤 Masaomi Matsuzaki
- 👤 Fumiaki Oshimi
- 👤 Nobuyuki Kuroda
- 👤 Mituji Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:31
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/08; C08F10/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A process for the production of polyolefins by polymerizing or copolymerizing one or more olefins in the presence of a catalyst comprising a transition metal compound supported on a solid carrier selected from the group consisting of an oxide, a double oxide and a hydroxide of magnesium and/or calcium and an organo-metallic compound selected from the group consisting of an organo-aluminum compound and an organozinc compound, said transition metal compound being selected from the group consisting of tetravalent titanium compounds, trivalent titanium compounds, pentavalent vanadium compounds, tetravalent vanadium compounds and trivalent vanadium compounds, said solid carrier being treated by direct contact with gaseous sulfur dioxide (SO 2 ) at a temperature in the range of room temperature to 800° C. under a gaseous atmosphere and consisting of a product containing from 0.1% to 20% by weight sulfur.
Claim 2
Dependent Claim
137 words
A process for the production of polyolefins by polymerizing or copolymerizing one or more olefins in the presence of a catalyst comprising a transition metal compound supported on a solid carrier selected from the group consisting of an oxide, a double oxide and a hydroxide of magnesium and/or calcium and an organo-metallic compound selected from the group consisting of an organo-aluminum compound and an organozinc compound, said transition metal compound being selected from the group consisting of tetravalent titanium compounds, trivalent titanium compounds, pentavalent vanadium compounds, tetravalent vanadium compounds and trivalent vanadium compounds, said solid carrier being treated by direct contact with gaseous sulfur dioxide (SO 2 ) at a temperature in the range of room temperature to 800° C. under a gaseous atmosphere and consisting of a product containing from 0.1% to 20% by weight sulfur.
Claim 3
Dependent Claim
41 words
The process of claim 1 wherein said double oxide is selected from the group consisting of MgO.Al 3 O 3 , MgO.SiO 2 , MgO.Al 2 O 3 .CaO, CaO.Al 2 O 3 , CaO.SiO 2 and natural or synthetic hydrotalcite.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein said carrier is contacted with said catalyst component at a temperature in the range of 50° to 300° C.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein said catalyst component is used in amounts of 0.001 to 50 times by weight with respect to said carrier.
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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |