US4260708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphite in MgX2 supported TiX3 /AlCl3 catalyst system
Assignee: Phillips Petroleum Co
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Filing: 1978-09-01
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Granted: 1981-04-07
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Expires: 1998-09-01
Abstract
Abstract A catalyst system is made up of a catalyst and a cocatalyst. The catalyst component comprises a magnesium chloride support, a titanium trichloride, an aluminum trichloride and an organic phosphite. The cocatalyst comprises an organoaluminum compound. Exemplary of such a system is a MgCl 2 supported TiCl 3 .1/3AlCl 3 plus triphenyl phosphite as the catalyst and triethylaluminum plus diethylaluminum chloride and ethyl anisate as the cocatalyst. Such catalyst systems give both high productivity and low solubles in the polymerization of propylene. For ethylene polymerization, the cocatalyst can simply be triethylaluminum.
Inventors
- 👤 Lawrence M. Fodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:30
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/02; C08F4/022; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
A polymerization process comprising contacting propylene under polymerization conditions with a catalyst which forms on milling MgCl 2 , TiCl 3 , AlCl 3 and an aryl phosphite to form a first component which first component is combined with a cocatalyst formed by contacting a trialkyl aluminum compound, a dihydrocarbylaluminum chloride, and a para-alkoxy benzoic acid ester, said MgCl 2 being present in an amount within the range of 50 to 95 weight percent, said TiCl 3 being present in an amount within the range of 2 to 20 weight percent, said AlCl 3 being present in an amount of 0.1 to 10 weight percent and said organic phosphite being present in an amount of 1 to 20 weight percent, based on the total weight of said first component.
Claim 2
Dependent Claim
129 words
A polymerization process comprising contacting propylene under polymerization conditions with a catalyst which forms on milling MgCl 2 , TiCl 3 , AlCl 3 and an aryl phosphite to form a first component which first component is combined with a cocatalyst formed by contacting a trialkyl aluminum compound, a dihydrocarbylaluminum chloride, and a para-alkoxy benzoic acid ester, said MgCl 2 being present in an amount within the range of 50 to 95 weight percent, said TiCl 3 being present in an amount within the range of 2 to 20 weight percent, said AlCl 3 being present in an amount of 0.1 to 10 weight percent and said organic phosphite being present in an amount of 1 to 20 weight percent, based on the total weight of said first component.
Claim 3
Dependent Claim
18 words
A method according to claim 1 wherein said polymerization conditions comprise a temperature of 71° to 85° C.
Claim 4
Dependent Claim
19 words
A method according to claim 1 wherein said cocatalyst is formed by contacting triethylaluminum, diethylaluminum chloride, and ethyl anisate.
Claim 5
Dependent Claim
12 words
A method according to claim 3 wherein said phosphite is triphenyl phosphite.
Claim 6
Dependent Claim
21 words
A method according to claim 4 wherein a mole ratio of said triethylaluminum:diethylaluminum chloride:ethyl anisate is within the range of 2-7:2-5:1.
Claim 7
Dependent Claim
27 words
A method according to claim 5 wherein said TiCl 3 and AlCl 3 are TiCl 3 ·1/3AlCl 3 formed by the reduction of TiCl 4 with aluminum.
Claim 8
Dependent Claim
31 words
A method according to claim 6 wherein said catalyst is formed by ball milling said MgCl 2 , TiCl 3 , AlCl 3 , and phosphite to form said first component.
Claim 9
Dependent Claim
30 words
A method according to claim 1 wherein a mole ratio of said organoaluminum compounds to said TiCl 3 plus said AlCl 3 is within the range of 50:1 to 400:1.
References Cited (Backward Citations)
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US4107412A
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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) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |