Patent US4391736A successfully refreshed from Google Patents.
US4391736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-olefin polymerization
Assignee: Phillips Petroleum Co
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Filing: 1981-06-05
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Granted: 1983-07-05
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Expires: 2001-06-05
Abstract
Abstract A process and catalyst for the polymerization of olefins wherein the catalyst comprises the product obtained by reacting a complex of a magnesium dihalide and a tetraalkyl titanate with the product resulting from a reaction between an organometallic compound and a hydroxyl-containing carrier such as silica and then reacting that product with a titanium halide.
Inventors
- 👤 Charles E. Capshew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:02
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A method for producing a catalyst comprising (1) reacting a first component comprising the product of a reaction between a magnesium dihalide and a tetraalkyl titanate with a second component comprising the product of a reaction between a substantially anhydrous particulate hydroxyl-containing refractory carrier and an organometal compound of a metal of Group I to V and then (2) reacting the resulting solid with titanium tetrahalide.
Claim 2
Independent Claim
66 words
A method for producing a catalyst comprising (1) reacting a first component comprising the product of a reaction between a magnesium dihalide and a tetraalkyl titanate with a second component comprising the product of a reaction between a substantially anhydrous particulate hydroxyl-containing refractory carrier and an organometal compound of a metal of Group I to V and then (2) reacting the resulting solid with titanium tetrahalide.
Claim 3
Dependent Claim
27 words
A method according to claim 1 wherein said tetraalkyl titanate is selected from those tetraalkyl titanates in which the alkyl groups contain 1 to 20 carbon atoms.
Claim 4
Dependent Claim
50 words
A method according to claim 2 wherein said organometal compound is selected from organoaluminum compounds of the formula R n AlX 3-n where R is a hydrocarbyl group containing 1 to 20 carbon atoms, X is a halogen, and n is a number in the range of 0 to 3.
Claim 5
Dependent Claim
30 words
A method according to claim 3 wherein said substantially anhydrous hydroxyl-containing refractory carrier is selected from the group consisting of alumina, boria, magnesia, silicia, thoria, titania, silica-alumina, and silica titania.
Claim 6
Dependent Claim
26 words
A method according to claim 4 wherein said magnesium dihalide comprises magnesium dichloride, said tetraalkyl titanate comprises titanium tetraethoxide, and said hydroxyl-containing refractory carrier comprises silica.
Claim 7
Dependent Claim
27 words
A method according to claim 5 wherein said organoaluminum compound is selected from dialkylaluminum chlorides in which the alkyl groups each contain 1 to 6 carbon atoms.
Claim 8
Dependent Claim
13 words
A method according to claim 6 wherein said organoaluminum halide comprises diethylaluminum chloride.
Claim 9
Dependent Claim
13 words
A method according to claim 7 wherein said titanium tetrahalide comprises titanium tetrachloride.
Claim 10
Dependent Claim
12 words
A catalyst produced by the method of any one of claims 1-8.
Claim 11
Dependent Claim
94 words
A catalyst according to claim 9 in combination with a second catalyst produced by reacting magnesium dihalide with a tetraalkyl titanate and then reacting a solution of that product with a precipitating agent selected from the group of organoaluminum compounds of the formula R n AlX 3-n where R is a hydrocarbyl group containing 1 to 20 carbon atoms, X is a halogen, and n is a number between 0 and 3, and then treating the resulting solid with a halide ion exchanging source selected from the group consisting of halides of transition metals.
References Cited (Backward Citations)
US3152088A
Cited
US3168484A
Cited
US3454547A
Cited
US3718636A
Cited
US3943067A
Cited
GB1401708A
Cited
US4089808A
Cited
US4039472A
Cited
US4218339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |