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US4239872A
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Olefine polymerization with supported catalysts
Assignee: Union Carbide Chemicals and Plastics Technology LLC
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Filing: 1979-10-17
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Granted: 1980-12-16
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Expires: 1999-10-17
Abstract
Abstract Polymerization catalysts are prepared by impregnation of a silica or aluminum support with a vanadium, titanium and/or chromium salt decomposable upon calcination to the oxide, calcining the impregnated support at about 500 DEG -700 DEG C., impregnating the calcined support with a solution of aluminum hydride and heating the resultant material to about 300 DEG C.-500 DEG C. in hydrogen. The catalyst is extremely active for the polymerization of lower molecular weight olefins such as ethylene and ethylene-propylene mixtures.
Inventors
- 👤 Lynn H. Slaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:43
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
128 words
In a polymerization process for the production of a normally solid polymer, the steps of contacting a charging stock comprising ethylene or a mixture of ethylene and a mono-olefinic hydrocarbon having 2 to 4 carbon atoms, inclusive, per molecule with a catalyst prepared by: (a) impregnating a silica or alumina support with a transition metal salt decomposable upon calcination to the oxide wherein said metal is selected from the group consisting of vanadium, titanium, chromium and mixtures thereof; (b) calcining the metal impregnated support at a temperature ranging from about 450° C. to about 1000° C.; (c) impregnating the calcined support with a solution of aluminum hydride; and (d) heating the hydride impregnated support in hydrogen at a temperature of from about 200° C. to about 600° C.
Claim 2
Dependent Claim
128 words
In a polymerization process for the production of a normally solid polymer, the steps of contacting a charging stock comprising ethylene or a mixture of ethylene and a mono-olefinic hydrocarbon having 2 to 4 carbon atoms, inclusive, per molecule with a catalyst prepared by: (a) impregnating a silica or alumina support with a transition metal salt decomposable upon calcination to the oxide wherein said metal is selected from the group consisting of vanadium, titanium, chromium and mixtures thereof; (b) calcining the metal impregnated support at a temperature ranging from about 450° C. to about 1000° C.; (c) impregnating the calcined support with a solution of aluminum hydride; and (d) heating the hydride impregnated support in hydrogen at a temperature of from about 200° C. to about 600° C.
Claim 3
Dependent Claim
34 words
The process of claim 1 where, in the catalyst, the metal impregnated support is calcined at about 500° C.-950° C. and the hydride impregnated support is heated in hydrogen at about 250° C.-550° C.
Claim 4
Dependent Claim
18 words
The process of 2 wherein the hydride impregnated support is heated in hydrogen at about 300° C.-500° C.
Claim 5
Dependent Claim
18 words
The process of 2 wherein the hydride impregnated support is heated in hydrogen at about 300° C.-500° C.
Claim 6
Dependent Claim
28 words
The process of claim 1 wherein the temperature ranges from about 0° C. to about 200° C. and the pressure ranges from about atmospheric to about 30,000 psig.
Claim 7
Dependent Claim
30 words
The process of claims 1, 2, 3 or 4 wherein the charging stock is selected from the group consisting of ethylene, ethylene admixed with propylene and ethylene admixed with 1-butene.
Claim 8
Dependent Claim
20 words
The process of claims 1, 2, 3 or 4 wherein the charging stock is ethylene or ethylene admixed with propylene.
Claim 9
Dependent Claim
15 words
The process of claims 1, 2, 3 or 4 wherein the charging stock is ethylene.
Claim 10
Dependent Claim
17 words
The process of claims 1, 2, 3 or 4 where, in the catalyst, the support is silica.
Claim 11
Dependent Claim
24 words
The process of claims 1, 2, 3 or 4 where, in the catalyst, the calcination is carried out in a neutral or oxidizing atmosphere.
Claim 12
Dependent Claim
22 words
The process of claims 1, 2, 3 or 4 where, in the catalyst, the calcination is carried out in an oxidizing atmosphere.
Claim 13
Dependent Claim
20 words
The process of claims 1, 2, 3 or 4 where, in the catayst, the calcination is carried out in air.
Claim 14
Dependent Claim
56 words
The process of claims 1, 2, 3 or 4 wherein the transition metal ranges from about 0.1 to about 20 percent by weight (measured as the metal) of the total catalyst and the aluminum added as aluminum hydride ranges from about 0.1 to about 25 percent by weight (measured as the metal) of the total catalyst.
Claim 15
Dependent Claim
56 words
The process of claims 1, 2, 3 or 4 wherein the transition metal ranges from about 0.5 to about 5 percent by weight (measured as the metal) of the total catalyst and the aluminum added as aluminum hydride ranges from about 1 to about 10 percent by weight (measured as the metal) fo the total catalyst.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |