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US4579836A
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Exhaustively prepolymerized supported alpha-olefin polymerization catalyst
Assignee: BP Corp North America Inc
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Filing: 1985-05-22
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Granted: 1986-04-01
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Expires: 2005-05-22
Abstract
Abstract An exhaustively prepolymerized supported olefin polymerization catalyst component comprises solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing catalyst particles which have been contacted with an olefin monomer and an organo-aluminum co-catalyst under exhaustive prepolymerization conditions at an Al/Ti atomic ratio such that the weight of prepolymer formed is less than 10 times the weight of such catalyst particles and the resulting prepolymerized catalyst particles essentially are inactive to further polymerization.
Inventors
- 👤 Gregory G. Arzoumanidis
- 👤 Sam S. Lee
- 👤 Benjamin S. Tovrog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:09
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/904
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
66 words
An exhaustively prepolymerized supported olefin polymerization catalyst component comprising solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing catalyst particles which have been contacted with an olefin monomer and an organo-aluminum co-catalyst under exhaustive prepolymerization conditions at an Al/Ti atomic ratio such that the weight of prepolymer formed is less than 10 times the weight of such catalyst particles and the resulting prepolymerized catalyst particles essentially are inactive to further polymerization.
Claim 2
Dependent Claim
66 words
An exhaustively prepolymerized supported olefin polymerization catalyst component comprising solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing catalyst particles which have been contacted with an olefin monomer and an organo-aluminum co-catalyst under exhaustive prepolymerization conditions at an Al/Ti atomic ratio such that the weight of prepolymer formed is less than 10 times the weight of such catalyst particles and the resulting prepolymerized catalyst particles essentially are inactive to further polymerization.
Claim 3
Dependent Claim
19 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the Al/Ti atomic ratio is about 0.2 to 1.3.
Claim 4
Dependent Claim
19 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the Al/Ti atomic ratio is about 0.4 to 0.9.
Claim 5
Dependent Claim
19 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the Al/Ti atomic ratio is about 0.5 to 0.8.
Claim 6
Dependent Claim
27 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the weight of prepolymer is about 0.1 to about 7 times the weight of the catalyst particles.
Claim 7
Dependent Claim
27 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the weight of prepolymer is about 0.5 to about 5 times the weight of the catalyst particles.
Claim 8
Dependent Claim
25 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the resulting prepolymerized catalyst particles show a Static Tube Activity Test of less than 1.
Claim 9
Dependent Claim
24 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the resulting prepolymerized catalyst particles show a Granulometer Activity Test of less than 1.
Claim 10
Dependent Claim
33 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the prepolymerization conditions include a temperature of about 30° to about 140° F. and a pressure of about 5 to about 100 psig.
Claim 11
Dependent Claim
33 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the prepolymerization conditions include a temperature of about 60° to about 135° F. and a pressure of about 15 to about 40 psig.
Claim 12
Dependent Claim
33 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the prepolymerization conditions include a temperature of about 70° to about 100° F. and a pressure of about 20 to about 35 psig.
Claim 13
Dependent Claim
15 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the organo-aluminum co-catalyst comprises trialkylaluminum.
Claim 14
Dependent Claim
15 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the organo-aluminum co-catalyst comprises triethylaluminum.
Claim 15
Dependent Claim
29 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein the solid catalyst component comprises a hydrocarbon-insoluble particles containing magnesium, titanium and chlorine together with an electron donor compound.
Claim 16
Dependent Claim
17 words
The exhaustively prepolymerized supported catalyst component of claim 1 wherein during prepolymerization no co-catalyst modifier is used.
Claim 17
Dependent Claim
72 words
An exhaustively prepolymerized supported olefin polymerization catalyst component comprising solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing, electron-donor-containing catalyst particles which have been contacted with propylene monomer and an trialkyl aluminum co-catalyst under exhaustive prepolymerization conditions at an Al/Ti atomic ratio between about 0.2 and 1.3 such that the weight of prepolymer formed is less than 10 times the weight of such catalyst particles and the resulting prepolymerized catalyst particles essentially are inactive to further polymerization.
Claim 18
Dependent Claim
72 words
An exhaustively prepolymerized supported olefin polymerization catalyst component comprising solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing, electron-donor-containing catalyst particles which have been contacted with propylene monomer and an trialkyl aluminum co-catalyst under exhaustive prepolymerization conditions at an Al/Ti atomic ratio between about 0.2 and 1.3 such that the weight of prepolymer formed is less than 10 times the weight of such catalyst particles and the resulting prepolymerized catalyst particles essentially are inactive to further polymerization.
Claim 19
Dependent Claim
15 words
The exhaustively prepolymerized supported catalyst component of claim 16 wherein the prepolymerization co-catalyst is triethylaluminum.
Claim 20
Dependent Claim
19 words
The exhaustively prepolymerized supported catalyst component of claim 16 wherein the Al/Ti atomic ratio is about 0.4 to 0.9.
Claim 21
Dependent Claim
29 words
The exhaustively prepolymerized supported catalyst component of claim 18 wherein the prepolymerization temperature is about 70° to about 100° F. and wherein during prepolymerization no co-catalyst modifier is used.
Claim 22
Dependent Claim
24 words
The exhaustively prepolymerized supported catalyst component of claim 16 wherein the resulting prepolymerized catalyst particles show a Granulometer Activity Test of less than 1.
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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |