Patent US4383096A successfully refreshed from Google Patents.
US4383096A
Expired / Lapsed
US
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Method of polymerizing 1-olefins
Assignee: Enron Chemical Co
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Filing: 1980-11-03
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Granted: 1983-05-10
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Expires: 2000-11-03
Abstract
Abstract An olefin polymerization and copolymerization catalyst active in the presence of an alkyl aluminum cocatalyst is prepared by mixing, in the presence of a solvent, particles of a silica or alumina material having reactive surface groups, and a complex of the general formula (MgR2)m(AlR'3)n where R and R' are alkyl groups and m/n is between about 0.5 and 10, inclusive, to form a hydrocarbon insoluble reaction product which is then mixed, in the presence of a solvent, with a titanium, vanadium or zirconium halide, oxyhalide or alkoxyhalide, followed by evaporation of the solvent.
Inventors
- 👤 Mitsuzo Shida
- 👤 Thomas J. Pullukat
- 👤 Raymond E. Hoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:02
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A method of making polymers of one or more 1-olefins which comprises polymerizing said olefins under polymerizing conditions with a catalyst active in the presence of an alkyl aluminum co-catalyst, said catalyst being prepared by mixing, in the presence of a solvent, reactive materials comprising dry particles of silica, said particles having been preactivated by heating at between about 200° C. and 900° C., and a complex of the general formula (MgR 2 ) m (AlR 3 ') n where R and R' are alkyl groups and m/n is between about 0.5 and 10, inclusive, to form a reaction mixture of said solvent and a hydrocarbon insoluble first reaction product, and mixing said reaction mixture with a halide, oxyhalide or alkoxyhalide of tetravalent titanium to form a second reaction product, and evaporating said solvent from said second reaction product, said titanium compound being present in substantially equimolar ratio with respect to said active hydroxyl and oxide groups in said silica and with respect to the total magnesium and aluminum present in said first reaction product.
Claim 2
Independent Claim
175 words
A method of making polymers of one or more 1-olefins which comprises polymerizing said olefins under polymerizing conditions with a catalyst active in the presence of an alkyl aluminum co-catalyst, said catalyst being prepared by mixing, in the presence of a solvent, reactive materials comprising dry particles of silica, said particles having been preactivated by heating at between about 200° C. and 900° C., and a complex of the general formula (MgR 2 ) m (AlR 3 ') n where R and R' are alkyl groups and m/n is between about 0.5 and 10, inclusive, to form a reaction mixture of said solvent and a hydrocarbon insoluble first reaction product, and mixing said reaction mixture with a halide, oxyhalide or alkoxyhalide of tetravalent titanium to form a second reaction product, and evaporating said solvent from said second reaction product, said titanium compound being present in substantially equimolar ratio with respect to said active hydroxyl and oxide groups in said silica and with respect to the total magnesium and aluminum present in said first reaction product.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein m/n is between about 2 and 10.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein said silica particles are preactivated by heating at about 600° C.
Claim 5
Dependent Claim
44 words
The method of claim 1 wherein said titanium compound is chosen from the group consisting of TiCl 4 , Ti(OR")Cl 3 , Ti(OR") 2 Cl 2 , and Ti(OR") 3 Cl, wherein R" is an alkyl group of less than about 20 carbon atoms.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein R has between 2 and 12 carbon atoms.
Claim 7
Dependent Claim
17 words
The method of claim 5 wherein R is butyl, R' is ethyl, and m/n is about 6.5.
Claim 8
Dependent Claim
13 words
The method of claim 6 wherein said titanium compound is TiCl 4 .
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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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |