US4151110A
Expired / Lapsed
US
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Alpha olefin polymerization catalyst comprising an alkyl halide and a combination product of TiCl3 and transition metal chloride of vanadium, manganese, cobalt or iron
Assignee: SnamProgetti SpA
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Filing: 1977-03-25
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Granted: 1979-04-24
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Expires: 1997-03-25
Abstract
Abstract An alpha-olefin such as ethylene is polymerized in the presence of a catalyst system consisting of (1) an alkyl-halide, alkyl-derivative or hydride of a metal belonging to one of the first three groups of the periodic system and (a) the combination product of a transition metal chloride and titanium trichloride said transition metal chloride being derived from the reaction of a transition metal carbonyl and titanium tetrachloride.
Inventors
- 👤 Sebastiano Cesca
- 👤 Alberto Greco
- 👤 Guglielmo Bertolini
- 👤 Mario Bruzzone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:20
CPC Classifications
C; C08; C08F; C08F110/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
A catalyst for the polymerization of an alpha-olefin consisting of a carrier having a high superficial area selected from alkali metal and alkaline earth metal halides; in combination with (a) an alkyl halide of a metal of Groups I-III of the periodic system, an alkyl derivative of Groups I-III of the periodic system or a hydride of a metal belonging to Groups I-III of the periodic system; and (b) a combination product of titanium trichloride and a chloride of another transition metal selected from the group consisting of V, Mn, Co and Fe that is prepared by impregnating said carrier with a solution of a carbonyl of said other transition metal, refluxing the impregnated carrier with titanium tetrachloride to convert said carbonyl into the chloride of said other transition metal and then removing excess titanium tetrachloride.
Claim 2
Dependent Claim
136 words
A catalyst for the polymerization of an alpha-olefin consisting of a carrier having a high superficial area selected from alkali metal and alkaline earth metal halides; in combination with (a) an alkyl halide of a metal of Groups I-III of the periodic system, an alkyl derivative of Groups I-III of the periodic system or a hydride of a metal belonging to Groups I-III of the periodic system; and (b) a combination product of titanium trichloride and a chloride of another transition metal selected from the group consisting of V, Mn, Co and Fe that is prepared by impregnating said carrier with a solution of a carbonyl of said other transition metal, refluxing the impregnated carrier with titanium tetrachloride to convert said carbonyl into the chloride of said other transition metal and then removing excess titanium tetrachloride.
Claim 3
Dependent Claim
24 words
A catalyst according to claim 1 wherein the transition metal constitutes from 0.1 to 10% by weight with respect to the weight of carrier.
Claim 4
Dependent Claim
24 words
A catalyst according to claim 2 wherein the transition metal constitutes from 1 to 3% by weight with respect to the weight of carrier.
Claim 5
Dependent Claim
31 words
A catalyst according to claim 1 wherein the alkyl derivative of Groups I-III of the periodic system is the tri-isobutyl aluminum and the carbonyl of another transition metal is vanadium carbonyl.
Claim 6
Dependent Claim
30 words
A catalyst according to claim 1 wherein the alkyl derivative of Groups I-III of the periodic system is tri-isobutyl aluminum and the carbonyl of another transition metal is manganese carbonyl.
Claim 7
Dependent Claim
30 words
A catalyst according to claim 1 wherein the alkyl derivative of Groups I-III of the periodic system is tri-isobutyl aluminum and the carbonyl of another transition metal is cobalt carbonyl.
Claim 8
Dependent Claim
30 words
A catalyst according to claim 1 wherein the alkyl derivative of Groups I-III of ther periodic system is tri-isobutyl aluminum and the carbonyl of another transition metal is iron carbonyl.
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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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |