US4388219A
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Catalyst for polymerizing ethylene, comprising compounds of several transition metals, and a polymerization process using said catalyst
Assignee: Orkem SA
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Filing: 1980-12-19
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Granted: 1983-06-14
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Expires: 2000-12-19
Abstract
Abstract A catalyst for polymerizing ethylene, especially at high temperature and high pressure, comprising at least two halogen compounds of transition metals, one of which is a titanium trichloride syncrystallized with aluminum chloride. The catalyst has the formula (TiCl.sub.3, 1/3AlCl.sub.3)(MX.sub.3).sub.x (MgX.sub.2).sub.y wherein 0.3≦x≦3, 0≦y≦20, M is a transition metal of Groups V B and VI B of the Periodic System, and X is a halogen. The second transition metal is preferably vanadium, chromium, molybdenum, or tungsten. The catalyst is made by subjecting titanium trichloride syncrystallized with aluminum chloride, the trivalent halide of M, and, optionally, anhydrous magnesium halide to a milling step in which the milling energy is at least equal to three kWh per kg of solid material treated, which results in a binary solid solution structure Ti-M of which the dimension of crystallites is less than or equal to 100 Angstroms.
Inventors
- 👤 Karel Bujadoux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:10
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
55 words
A catalyst for polymerizing ethylene comprising at least two halogen compounds of transition metals, one of which is a titanium trichloride syncrystallized with aluminium chloride, having the formula: (TiCl.sub.3, 1/3AlCl.sub.3)(MX.sub.3).sub.x (MgX.sub.2).sub.y wherein 0.3≦x≦3, 0≦y≦20, M is a transition metal of group V B and VI B of thhe Periodic system and X is a halogen.
Claim 2
Dependent Claim
55 words
A catalyst for polymerizing ethylene comprising at least two halogen compounds of transition metals, one of which is a titanium trichloride syncrystallized with aluminium chloride, having the formula: (TiCl.sub.3, 1/3AlCl.sub.3)(MX.sub.3).sub.x (MgX.sub.2).sub.y wherein 0.3≦x≦3, 0≦y≦20, M is a transition metal of group V B and VI B of thhe Periodic system and X is a halogen.
Claim 3
Dependent Claim
28 words
A catalyst according to claim 1, having a binary solid solutioh structure Ti-M of which the dimension of crystallites is less than or equal to 100 Angstrom units.
Claim 4
Dependent Claim
8 words
A catalyst according to claim 1, wherein 2≦y≦20.
Claim 5
Dependent Claim
62 words
A process for manufacturing a catalyst according to claim 1, 2, or 3, comprising bringing into contact titanium trichloride crystallized together with aluminum chloride, the trivalent halide of metal M and, optionally, anhydrous magnesium halide, and subjecting said three halides to a milling step in which the milling energy is at least equal to 3 kWh per kg of solid material treated.
Claim 6
Dependent Claim
21 words
A process according to claim 4, wherein the milling energy is not above 25 kWh per kg of solid material treated.
Claim 7
Dependent Claim
20 words
A catalyst according to claim 1, wherein M is selected from the group consisting of vanadium, chromium, molybdenum, and tungsten.
Claim 8
Dependent Claim
10 words
A catalyst according to claim 6, wherein M is vanadium.
Claim 9
Dependent Claim
10 words
A catalyst according to claim 6, wherein M is chromium.
Claim 10
Dependent Claim
12 words
A catalyst according to claim 1, wherein x is more than 1.0.
Claim 11
Dependent Claim
111 words
A catalyst for polymerizing ethylene comprising at least two halogen compounds of transition metals, one of which is a titanium trichloride syncrystallized with aluminum chloride, having the formula: (TiCl.sub.3, 1/3AlCl.sub.3)(MX.sub.3).sub.x (MgX.sub.2).sub.y wherein 0.3≦x≦3, 0≦y≦20, M is a transition metal of Groups V B and VI B of the Periodic System and X is a halogen, said catalyst being made by a process comprising bringing into contact titanium trichloride crystallized together with aluminum chloride, the trivalent halide of metal M and, optionally, anhydrous magnesium halide, and subjecting said three halides to a milling step in which the milling energy is at least equal to 3 kWh per kg of solid material treated.
Claim 12
Dependent Claim
111 words
A catalyst for polymerizing ethylene comprising at least two halogen compounds of transition metals, one of which is a titanium trichloride syncrystallized with aluminum chloride, having the formula: (TiCl.sub.3, 1/3AlCl.sub.3)(MX.sub.3).sub.x (MgX.sub.2).sub.y wherein 0.3≦x≦3, 0≦y≦20, M is a transition metal of Groups V B and VI B of the Periodic System and X is a halogen, said catalyst being made by a process comprising bringing into contact titanium trichloride crystallized together with aluminum chloride, the trivalent halide of metal M and, optionally, anhydrous magnesium halide, and subjecting said three halides to a milling step in which the milling energy is at least equal to 3 kWh per kg of solid material treated.
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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |