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US5264088A
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Catalytic composition for the polymerization of olefins and its process of preparation
Assignee: Norsolor SA
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Filing: 1991-08-07
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Granted: 1993-11-23
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Expires: 2011-08-07
Abstract
Abstract Process for the preparation of a catalytic composition for the polymerization of olefins. At least partial electrochemical oxidation of aluminum in a solvent of α, ω-dihalogeno-alkane and simultaneously the electrochemical reduction of a compound of titanium (IV) occur in process. The catalytic composition comprises at least one titanium compound, at least one halogenated organs-aluminum compound and at least one inorganic magnesium compound in suspension in at least one α,ω-dihalogeno-alkane. The titanium compound is essentially a titanium (III) compound. The overall content of titanium (II) and titanium (IV) is less than or equal to 15% of the total titanium content.
Inventors
- 👤 Jean M. Brusson
- 👤 Karel Bujadoux
- 👤 Francis Petit
- 👤 Jean M. Fuchs
- 👤 Andre Mortreux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:26
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A process for the polymerization of olefins, comprising polymerizing at least one olefin at a temperature of between 20° C. and 350° C., in the presence of a catalytic composition comprising: (a) at least one titanium compound, the titanium compound being essentially a titanium (III) compound, the overall content of titanium (II) and titanium (IV) being less than or equal to 15% of the total titanium content; (b) at least one halogenated organo-aluminum compound of formula X 2 Al(CH 2 ) n AlX 2 , in which X is a halogen and n is between 1 and 10; and (c) at least one magnesium halide in suspension in a solvent of at least one α,ω-di-halogenoalkane.
Claim 2
Dependent Claim
115 words
A process for the polymerization of olefins, comprising polymerizing at least one olefin at a temperature of between 20° C. and 350° C., in the presence of a catalytic composition comprising: (a) at least one titanium compound, the titanium compound being essentially a titanium (III) compound, the overall content of titanium (II) and titanium (IV) being less than or equal to 15% of the total titanium content; (b) at least one halogenated organo-aluminum compound of formula X 2 Al(CH 2 ) n AlX 2 , in which X is a halogen and n is between 1 and 10; and (c) at least one magnesium halide in suspension in a solvent of at least one α,ω-di-halogenoalkane.
Claim 3
Dependent Claim
59 words
The process according to claim 1, wherein the olefin is ethylene alone or in admixture with at least one α-olefin, and the polymerization is carried out at a temperature of between 20° C. and 250° C. under a pressure of up to 200 bars, in solution or in suspension in an inert hydrocarbon having at least 6 carbon atoms.
Claim 4
Dependent Claim
25 words
The process according to claim 2, wherein the concentration of titanium derivative in the catalytic composition is between 100 millimoles and 400 millimoles per liter.
Claim 5
Dependent Claim
60 words
The process according to claim 2, wherein the polymerization is carried out in a continuous manner in a reactor in which the means residence time of the catalytic composition is between 1 and 150 second, the polymerization being carried out at a temperature of between 160° C. and 350° C. under a pressure of between 400 bars and 3,000 bars.
Claim 6
Dependent Claim
43 words
The process according to claim 1, wherein the dihalogenoalkane has the formula X(CH 2 ) n X' wherein X and X', which may be the same or different, are each a halogen atom, and n is an integer of from 1 to 10.
Claim 7
Dependent Claim
49 words
The process according to claim 1, wherein the catalytic composition further comprises at least one activator selected from compounds of the following formulas: AlR 3 ; RR'Al--O--AlR"R'"; R--SiH 2 --O--AlR'R"; and mixtures thereof, in which R, R', R", and R'" are alkyl groups having 1 to 12 carbon atoms.
Claim 8
Dependent Claim
78 words
A process for the preparation of a catalytic composition for the polymerization of olefins comprising: at least partial electrochemical oxidation of aluminum in a solvent of at least one α,ω-dihalogenoalkane, and simultaneously, the electrochemical reduction of a compound of titanium (IV), wherein the dihalogenoalkane has the formula X(CH 2 ) n X' wherein X and X', which may be the same or different, are each a halogen atom, and n is an integer of from 1 to 10.
Claim 9
Dependent Claim
78 words
A process for the preparation of a catalytic composition for the polymerization of olefins comprising: at least partial electrochemical oxidation of aluminum in a solvent of at least one α,ω-dihalogenoalkane, and simultaneously, the electrochemical reduction of a compound of titanium (IV), wherein the dihalogenoalkane has the formula X(CH 2 ) n X' wherein X and X', which may be the same or different, are each a halogen atom, and n is an integer of from 1 to 10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-11-22 | 1997-05-24 | 1997-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-22 | 2001-05-24 | 2001-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-22 | 2005-05-24 | 2005-11-23 | $7700.00 | Window Closed / Lapsed |