US4477588A
Expired / Lapsed
US
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Polyolefin polymerization process and catalyst
Assignee: Phillips Petroleum Co
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Filing: 1982-12-15
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Granted: 1984-10-16
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Expires: 2002-12-15
Abstract
Abstract A catalyst and process for polymerizing olefins wherein the catalyst comprises a titanium-containing component prepared by reacting a magnesium dihalide, 4-phenyl phenol, ethyl benzoate, and titanium tetrabutoxide, and an organoaluminum halide and then reacting that product with a mixture of TiCl 4 , HSiCl 3 , and SiCl 4 .
Inventors
- 👤 Gil R. Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:12
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A catalyst for the polymerization of olefins comprising the product resulting when reactants comprising (a) a magnesium dihalide, (b) 4-phenyl phenol, (c) ethyl benzoate, and (d) titanium tetra-n-butoxide are reacted to form a first catalyst component and said first catalyst component is reacted with an organoaluminum halide comprising ethylaluminum sesquichloride and then the solid product of that reaction is reacted with a mixture of halogen containing compounds comprising TiCl 4 , HSiCl 3 , and SiCl 4 , wherein the sum of the volumes of HSiCl 3 and SiCl 4 in the mixture is about equal to volume of TiCl 4 in the mixture.
Claim 2
Dependent Claim
104 words
A catalyst for the polymerization of olefins comprising the product resulting when reactants comprising (a) a magnesium dihalide, (b) 4-phenyl phenol, (c) ethyl benzoate, and (d) titanium tetra-n-butoxide are reacted to form a first catalyst component and said first catalyst component is reacted with an organoaluminum halide comprising ethylaluminum sesquichloride and then the solid product of that reaction is reacted with a mixture of halogen containing compounds comprising TiCl 4 , HSiCl 3 , and SiCl 4 , wherein the sum of the volumes of HSiCl 3 and SiCl 4 in the mixture is about equal to volume of TiCl 4 in the mixture.
Claim 3
Dependent Claim
13 words
A catalyst according to claim 1 wherein said magnesium dihalide comprises magnesium dichloride.
Claim 4
Dependent Claim
45 words
A catalyst according to claim 2 wherein the sum of the moles of 4-phenyl phenol and the ethyl benzoate employed in the reaction is such that the ratio of said sum to the moles of titanium tetra-n-butoxide is in the range of 5/1 to 1/5.
Claim 5
Dependent Claim
21 words
A catalyst according to claim 3 wherein the molar ratio of the ethyl benzoate to the titanium tetra-n-butoxide is about 1/2.
Claim 6
Dependent Claim
19 words
A catalyst according to claim 4 wherein the volume ratio of HSiCl 3 to SiCl 4 is about 3/1.
Claim 7
Dependent Claim
24 words
A catalyst according to claim 5 wherein the mole ratio of 4-phenyl phenol to titanium tetra-n-butyloxide is in the range of 2/1 to 1/1.
Claim 8
Dependent Claim
23 words
A catalyst according to claim 6 further comprising a cocatalyst comprising triethylaluminum and an ester selected from ethyl anisate and methyl para toluate.
Claim 9
Dependent Claim
23 words
A catalyst according to claim 7 wherein said cocatalyst comprises triethylaluminum, ethyl anisate, and diethylaluminum chloride present in the molar ratio of 2:1:2.
Claim 10
Dependent Claim
14 words
A catalyst according to claim 7 wherein said cocatalyst comprises triethylaluminum and methyl para-toluate.
Claim 11
Dependent Claim
13 words
A catalyst according to claim 9 wherein said cocatalyst further comprises diethylaluminum chloride.
Claim 12
Dependent Claim
31 words
A catalyst according to claim 6 further comprising a cocatalyst consisting essentially of triethylaluminum and methyl para toluate wherein the molar ratio of the former to the latter is about 3/1.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |