US4013822A
Expired / Lapsed
US
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Chromium-containing catalyst systems and their use for the polymerization of olefins
Assignee: Hoechst AG
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Filing: 1975-07-09
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Granted: 1977-03-22
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Expires: 1995-07-09
Abstract
Abstract An olefin polymerization catalyst comprising a chromium compound deposited on a carrier, which chromium compound is complexed with a straight-chain, branched-chain, or cyclic aliphatic hydrocarbon or mixture thereof such that the mol ratio of aliphatic hydrocarbon to chromium compound is 1:2-3, said chromium compound being deposited on said carrier material in an amount between 10.sup. -3 and 10 millimols chromium compound per gram of carrier material, said carrier material also containing a trialkyl, tricycloalkyl, triaryl, monohalodihydrocarbyl, or monoalkoxydihydrocarbyl aluminum compound; a process for preparing such an olefin polymerization catalyst and the use of such catalyst in the polymerization of olefins, particularly ethylene, propylene, 2-methylpropylene and butene-1.
Inventors
- 👤 Hans Feichtinger
- 👤 Hans-Walter Birnkraut
- 👤 Siegfried Lutze
- 👤 Wolfgang Payer
- 👤 Dieter Schnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:36
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
81 words
An olefin polymerization catalyst comprising a chromium compound deposited on a carrier material, which chromium compound is complexed with a straight-chain, branched-chain, or cyclic aliphatic hydrocarbon or mixture thereof such that the mol ratio of aliphatic hydrocarbon to chromium compound is 1:2-3, said chromium compound being deposited on said carrier material in an amount between 10.sup. -3 and 10 millimols chromium compound per gram of carrier material, said carrier material also containing a trialkyl, tricycloalkyl, triaryl, monohalodihydrocarbyl or monoalkyldihydrocarbyl aluminum compound.
Claim 2
Dependent Claim
81 words
An olefin polymerization catalyst comprising a chromium compound deposited on a carrier material, which chromium compound is complexed with a straight-chain, branched-chain, or cyclic aliphatic hydrocarbon or mixture thereof such that the mol ratio of aliphatic hydrocarbon to chromium compound is 1:2-3, said chromium compound being deposited on said carrier material in an amount between 10.sup. -3 and 10 millimols chromium compound per gram of carrier material, said carrier material also containing a trialkyl, tricycloalkyl, triaryl, monohalodihydrocarbyl or monoalkyldihydrocarbyl aluminum compound.
Claim 3
Dependent Claim
15 words
An olefin polymerization catalyst according to claim 1 wherein said chromium compound is chromyl chloride.
Claim 4
Dependent Claim
138 words
An olefin polymerization catalyst comprising a chromium compound deposited on the carrier material, which chromium compound is complexed with a straight-chain, branched-chain or cycloaliphatic hydrocarbon or mixture thereof such that the mol ratio of aliphatic hydrocarbon to chromium compound is 1:2-3, said chromium compound being deposited on said carrier material in an amount between 10.sup. -3 and 10 millimols chromium compound per gram of carrier material, said carrier material also having deposited thereon an organoaluminum compound of the formula AlX.sub.1 Y.sub.m Z.sub.n wherein X is an unsubstituted, aliphatic or cycloaliphatic or aromatic group; Y is an alkoxy group; Z is halogen; 1 equals 2 or 3; n and m are each 0, 1 or 2; 1+n+m equals 3 or the reaction product of triisobutyl aluminum with a diolefin, the chromium/aluminum atomic ratio being in the range of 1:1-200.
Claim 5
Dependent Claim
138 words
An olefin polymerization catalyst comprising a chromium compound deposited on the carrier material, which chromium compound is complexed with a straight-chain, branched-chain or cycloaliphatic hydrocarbon or mixture thereof such that the mol ratio of aliphatic hydrocarbon to chromium compound is 1:2-3, said chromium compound being deposited on said carrier material in an amount between 10.sup. -3 and 10 millimols chromium compound per gram of carrier material, said carrier material also having deposited thereon an organoaluminum compound of the formula AlX.sub.1 Y.sub.m Z.sub.n wherein X is an unsubstituted, aliphatic or cycloaliphatic or aromatic group; Y is an alkoxy group; Z is halogen; 1 equals 2 or 3; n and m are each 0, 1 or 2; 1+n+m equals 3 or the reaction product of triisobutyl aluminum with a diolefin, the chromium/aluminum atomic ratio being in the range of 1:1-200.
Claim 6
Dependent Claim
13 words
A catalyst according to claim 3 wherein said chromium compound is chromyl chloride.
Claim 7
Dependent Claim
13 words
A catalyst according to claim 3 wherein said organoaluminum compound is triethyl aluminum.
Claim 8
Dependent Claim
13 words
A catalyst according to claim 3 wherein said organo-aluminum compound is triisobutyl aluminum.
Claim 9
Dependent Claim
13 words
A catalyst according to claim 3 wherein said organoaluminum compound is tricyclohexyl aluminum.
Claim 10
Dependent Claim
13 words
A catalyst according to claim 3 wherein said organo-aluminum compound is monoethoxydiethyl aluminum.
Claim 11
Dependent Claim
13 words
A catalyst according to claim 3 wherein said organo-aluminum compound is monochlorodiethyl aluminum.
Claim 12
Dependent Claim
13 words
A catalyst according to claim 3 wherein said organoaluminum compound is isoprenyl aluminum.
Claim 13
Dependent Claim
19 words
A catalyst according to claim 1 wherein the atomic ratio of chromium to aluminum in said catalyst is 1:1-200.
Claim 14
Dependent Claim
19 words
A catalyst according to claim 3 wherein the atomic ratio of chromium to aluminum in said catalyst is 1:20-50.
Claim 15
Dependent Claim
26 words
A catalyst according to claim 3 wherein said carrier material is an inorganic carrier material having an internal surface area of 200-1000 square meters per gram.
Claim 16
Dependent Claim
22 words
A catalyst according to claim 13 wherein said carrier material is selected from the group consisting of aluminas, alumina silicates and silicas.
Claim 17
Dependent Claim
27 words
A catalyst according to claim 1 wherein said chromium compound is present on said carrier in an amount of 0.01 to 1 millimol per gram of carrier.
Claim 18
Dependent Claim
14 words
A catalyst according to claim 1 wherein said aliphatic hydrocarbon is a straight-run gasoline.
Claim 19
Dependent Claim
13 words
A catalyst according to claim 1 which has been heated to 80°-300° C.
Claim 20
Dependent Claim
68 words
A process of preparing the catalyst of claim 1 which comprises depositing onto a carrier material a chromium complex by contacting the same with a chromium compound and a straight-chain, branched-chain or cyclic aliphatic hydrocarbon, thereafter heating the carrier material containing chromium complex at 80°-300° C for between 5 and 120 minutes and subsequently depositing onto said carrier material a trialkyl, tricycloalkyl, triaryl, monochlorodihydrocarbyl or monoalkoxydihydrocarbyl aluminum compound.
Claim 21
Dependent Claim
38 words
A process according to claim 18 wherein subsequent to deposit of chromium complex but prior to deposit of the aluminum compound the carrier material containing chromium complex is heated at a temperature in the range of 100°-250° C.
Claim 22
Dependent Claim
19 words
A process for polymerizing an olefin which comprises contacting olefin under polymerization conditions with the catalyst of claim 1.
Claim 23
Dependent Claim
21 words
A process for polymerization of an olefin which comprises contacting an olefin under polymerization conditions with the catalyst of claim 3.
Claim 24
Dependent Claim
21 words
A process according to claim 20 wherein said olefin is selected from the group consisting of ethylene, propylene, 2-methylpropylene and butene-1.
Claim 25
Dependent Claim
22 words
A process according to claim 22 wherein said polymerization is carried out in a substantially oxygen- and water-free environment at 20°-300° C.
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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |