US4295999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst
Assignee: Union Carbide Chemicals and Plastics Technology LLC
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Filing: 1980-05-21
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Granted: 1981-10-20
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Expires: 2000-05-21
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 molecule 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
2026-11-09 01:27
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/14; B01J31/143; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
100 words
A process for the preparation of a catalyst suitable for polymerization reactions which process comprises: (a) impregnating a silica or alumina support with a transition metal salt decomposable upon calcination to the oxide wherein said metal salt is selected from the group consisting of vanadium, titanium, chromium or 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 range from about 200° C. to about 600° C.
Claim 2
Dependent Claim
100 words
A process for the preparation of a catalyst suitable for polymerization reactions which process comprises: (a) impregnating a silica or alumina support with a transition metal salt decomposable upon calcination to the oxide wherein said metal salt is selected from the group consisting of vanadium, titanium, chromium or 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 range from about 200° C. to about 600° C.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein 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 claim 2 wherein the impregnated support is heated in hydrogen at about 300° C.-500° C.
Claim 5
Dependent Claim
13 words
The process of claims 1, 2 or 3 wherein the support is silica.
Claim 6
Dependent Claim
20 words
The process of claims 1, 2 or 3 wherein the calcination is carried out in a neutral or oxidizing atmosphere.
Claim 7
Dependent Claim
16 words
The process of claims 1, 2 or 3 wherein the calcination is carried out in air.
Claim 8
Dependent Claim
55 words
The process of claims 1, 2 or 3 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 9
Dependent Claim
55 words
The process of claims 1, 2 or 3 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) of the total catalyst.
Claim 10
Dependent Claim
93 words
A catalyst suitable for polymerization reactions prepared by: (a) impregnating a silica or alumina support with a transition metal salt decomposable upon calcination to the oxide wherein said metal salt is selected from the group consisting of vanadium, titanium, chromium or 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 ranging from about 200° C. to about 600° C.
Claim 11
Dependent Claim
93 words
A catalyst suitable for polymerization reactions prepared by: (a) impregnating a silica or alumina support with a transition metal salt decomposable upon calcination to the oxide wherein said metal salt is selected from the group consisting of vanadium, titanium, chromium or 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 ranging from about 200° C. to about 600° C.
Claim 12
Dependent Claim
31 words
The catalyst of claim 9 wherein 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 13
Dependent Claim
18 words
The catalyst of claim 10 wherein the impregnated support is heated in hydrogen at about 300° C.-500° C.
Claim 14
Dependent Claim
13 words
The catalyst of claims 9, 10 or 11 wherein the support is silica.
Claim 15
Dependent Claim
20 words
The catalyst of claims 9, 10 or 11 wherein the calcination is carried out in a neutral or oxidizing atmosphere.
Claim 16
Dependent Claim
16 words
The catalyst of claims 9, 10 or 11 wherein the calcination is carried out in air.
Claim 17
Dependent Claim
55 words
The catalyst of claims 9, 10 or 11 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 18
Dependent Claim
55 words
The catalyst of claims 9, 10 or 11 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) of the total catalyst.
References Cited (Backward Citations)
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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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |