US4142990A
Expired / Lapsed
US
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Ziegler catalysts
Assignee: Euteco SpA
•
Filing: 1977-10-06
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Granted: 1979-03-06
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Expires: 1997-10-06
Abstract
Abstract Ziegler catalytic system comprising an organo-metallic compound of a metal of Groups I to III of the Periodic Table and a compound of a heavy metal of Groups IV to VI supported on a carrier, the latter being an activated amorphous alumina or alumino-silicate containing from 0.3 to 30% by weight of salts of aluminum with oxygenated inorganic anions, or of a mixture of the latter with salts of aluminum with non-oxygenated inorganic anions, said inorganic anions being introduced into the amorphous alumina or alumino-silicate by contacting the latter with one or more acid solutions of the inorganic anions and the carrier being then activated by calcination at 250° - 700° C.
Inventors
- 👤 Ferdinando Ligorati
- 👤 Renzo Invernizzi
- 👤 Carlo Collu
- 👤 Maurizio Fontanesi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:34
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
In a Ziegler catalytic system formed by the combination of an organo-metallic compound of a metal of Group I, II or III of the Periodic System of the Elements according to Mendeleef and a compound of a heavy metal of Group IV, V or VI of said Periodic System supported on a carrier, the improvement which comprises: said carrier being essentially an activated amorphous alumina or alumino-silicate containing from 0.3 to 30% by weight of one or more salts of aluminum with at least one anion selected from the group consisting of the sulphate, phosphate, chlorate, perchlorate and halogen-sulphonate anions or a mixture of the latter with one or more salts of aluminum with a halogen anion, said halogen and oxygenated anions being introduced into the amorphous alumina or alumino-silicate by contacting the latter with one or more acid solutions of said inorganic anions and said alumina or alumino-silicate being then activated by calcination at a temperature of from 250° to 700° C.
Claim 2
Dependent Claim
163 words
In a Ziegler catalytic system formed by the combination of an organo-metallic compound of a metal of Group I, II or III of the Periodic System of the Elements according to Mendeleef and a compound of a heavy metal of Group IV, V or VI of said Periodic System supported on a carrier, the improvement which comprises: said carrier being essentially an activated amorphous alumina or alumino-silicate containing from 0.3 to 30% by weight of one or more salts of aluminum with at least one anion selected from the group consisting of the sulphate, phosphate, chlorate, perchlorate and halogen-sulphonate anions or a mixture of the latter with one or more salts of aluminum with a halogen anion, said halogen and oxygenated anions being introduced into the amorphous alumina or alumino-silicate by contacting the latter with one or more acid solutions of said inorganic anions and said alumina or alumino-silicate being then activated by calcination at a temperature of from 250° to 700° C.
Claim 3
Dependent Claim
33 words
The catalytic system of claim 1, wherein said inorganic anions are introduced in an amount ensuring in the calcined alumina or alumino-silicate an inorganic anion content of from 0.2 to 25% by weight.
Claim 4
Dependent Claim
18 words
The catalytic system of claim 2, wherein said inorganic anion content is from 1.5 to 15% by weight.
Claim 5
Dependent Claim
21 words
The catalytic system of claim 1, wherein said heavy metal is selected from the group consisting of titanium, vanadium and chromium.
Claim 6
Dependent Claim
25 words
The catalytic system of claim 1, wherein said compound of a heavy metal is selected from the group consisting of halides, oxyhalides and alkoxy halides.
Claim 7
Dependent Claim
16 words
The catalytic system of claim 1, wherein said compound of a heavy metal is titanium tetrachloride.
Claim 8
Dependent Claim
22 words
The catalytic system of claim 1, wherein said organo-metallic compound is selected from the group consisting of alkylaluminum compounds and alkylaluminum halides.
Claim 9
Dependent Claim
20 words
The catalytic system of claim 1, wherein said organo-metallic compound is selected from the group consisting of triethylaluminum and triisobutylaluminum.
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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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |