Patent US4316818A successfully refreshed from Google Patents.
US4316818A
Expired / Lapsed
US
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Polymerization catalyst and process
Assignee: Phillips Petroleum Co
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Filing: 1980-10-06
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Granted: 1982-02-23
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Expires: 2000-10-06
Abstract
Abstract An active olefin polymerization catalyst is produced by halogenating magnesium oxide, contacting the halogenated magnesium oxide product with an alcohol, and treating the product thus produced with a titanium tetrahalide to obtain the catalyst. The catalyst can be combined with a cocatalyst component comprising a metallic hydride or an organometallic compound, e.g., an organoaluminum compound, in the polymerization process.
Inventors
- 👤 Melvin B. Welch
- 👤 Richard E. Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:49
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
A catalyst for the homopolymerization and copolymerization of alpha-olefins characterized as the product obtained by (a) reacting finely divided magnesium oxide at an elevated temperature with a halogenating agent, (b) treating the particulate product obtained in (a) with a monohydric alcohol, and (c) contacting the particulate product formed in (b) with a tetravalent halogenated titanium compound at a temperature and for a period of time sufficient to form a catalyst component (A).
Claim 2
Dependent Claim
72 words
A catalyst for the homopolymerization and copolymerization of alpha-olefins characterized as the product obtained by (a) reacting finely divided magnesium oxide at an elevated temperature with a halogenating agent, (b) treating the particulate product obtained in (a) with a monohydric alcohol, and (c) contacting the particulate product formed in (b) with a tetravalent halogenated titanium compound at a temperature and for a period of time sufficient to form a catalyst component (A).
Claim 3
Dependent Claim
40 words
A catalyst according to claim 1 wherein catalyst component A is combined with a cocatalyst component (B) comprising a metallic hydride or organometallic compound wherein said metal is selected from Groups IA, IIA, and IIIA of the Mendeleev Periodic Table.
Claim 4
Dependent Claim
33 words
A catalyst according to claim 1 wherein said halogenating agent is selected from HX, X 2 , and CX 4 , where X is a halogen and said titanium compound is titanium tetrachloride.
Claim 5
Dependent Claim
40 words
A catalyst according to claim 2 wherein said halogenating agent is selected from HX, X 2 , and CX 4 , where X is a halogen, said titanium compound is titanium tetrachloride, and cocatalyst component B is an organoaluminum compound.
Claim 6
Dependent Claim
24 words
A catalyst according to claim 1 wherein the mole ratio of magnesium oxide to titanium compound is in the range of 0.05:1 to 1.1:1.
Claim 7
Dependent Claim
24 words
A catalyst according to claim 1 wherein said halogenating agent is carbon tetrachloride, said alcohol is methanol, and said titanium compound is titanium tetrachloride.
Claim 8
Dependent Claim
10 words
A catalyst according to claim 5 which additionally contains triethylaluminum.
Claim 9
Independent Claim
101 words
A method of preparing a catalyst component A comprising (a) reacting finely divided magnesium oxide with a halogenating agent under halogenating conditions including an elevated temperature and for a period of time sufficient to form a halogenated magnesium oxide product, (b) treating the particulate product obtained in (a) with a monohydric alcohol, (c) contacting the particulate product obtained in (b) with a tetravalent halogenated titanium compound at a temperature and for a period of time sufficient to form an active catalyst component, and (d) washing the titanium contacted product obtained in (c) with an inert solvent to remove unreacted titanium compound.
Claim 10
Independent Claim
101 words
A method of preparing a catalyst component A comprising (a) reacting finely divided magnesium oxide with a halogenating agent under halogenating conditions including an elevated temperature and for a period of time sufficient to form a halogenated magnesium oxide product, (b) treating the particulate product obtained in (a) with a monohydric alcohol, (c) contacting the particulate product obtained in (b) with a tetravalent halogenated titanium compound at a temperature and for a period of time sufficient to form an active catalyst component, and (d) washing the titanium contacted product obtained in (c) with an inert solvent to remove unreacted titanium compound.
Claim 11
Dependent Claim
73 words
A method according to claim 8 wherein said reacting in (a) is carried out by contacting magnesium oxide with a halogenating agent and an oxygen-containing gas at a temperature in the range of 100° C. to 600° C.; said product of (a) is treated with said alcohol in admixture with an inert carrier gas; and said contacting in (c) is carried out by refluxing with said titanium compound in an inert hydrocarbon solvent.
Claim 12
Dependent Claim
38 words
A catalyst prepared according to claim 8 which is combined with a cocatalyst component B comprising a metallic hydride or organometallic compound wherein said metal is selected from Groups IA, IIA, and IIIA of the Mendeleev Periodic Table.
Claim 13
Dependent Claim
24 words
A process according to claim 8 wherein said halogenating agent is carbon tetrachloride, said alcohol is methanol, and said titanium compound is titanium tetrachloride.
Claim 14
Dependent Claim
11 words
A process according to claim 11 which catalyst additionally contains triethylaluminum.
Claim 15
Dependent Claim
39 words
A process according to claim 8 wherein the product obtained in step (a) is cooled before contacting with alcohol in step (b) and the product obtained in (b) is further cooled before contacting with said titanium compound in (c).
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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) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |