US4072727A
Expired / Lapsed
US
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Silver-cadmium-zinc alloy catalyst for hydrogenation of acrolein to allyl alcohol
Assignee: Celanese Corp
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Filing: 1976-08-13
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Granted: 1978-02-07
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Expires: 1996-08-13
Abstract
Abstract This invention provides a silver-cadmium-zinc alloy catalyst which is highly selective for hydrogenation of α,β-unsaturated carbonyl compounds to the corresponding α,β-unsaturated alcohol derivatives. Acrolein is hydrogenated to allyl alcohol in 70 percent yield at 100 percent conversion.
Inventors
- 👤 Thomas H. Vanderspurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:08
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A catalyst composition consisting essentially of a silver-cadmium-zinc alloy on a carrier substrate, wherein the atomic ratio of silver to cadmium in the alloy is in the range of between about 0.1 and 3 to 1, and the zinc is contained in the alloy in a quantity between about 0.001 and 30 weight percent, based on the total weight of alloy, and wherein the silver-cadmium-zinc alloy exhibits an X-ray diffraction pattern which is substantially free of detectable unalloyed metal crystallite lines.
Claim 2
Dependent Claim
81 words
A catalyst composition consisting essentially of a silver-cadmium-zinc alloy on a carrier substrate, wherein the atomic ratio of silver to cadmium in the alloy is in the range of between about 0.1 and 3 to 1, and the zinc is contained in the alloy in a quantity between about 0.001 and 30 weight percent, based on the total weight of alloy, and wherein the silver-cadmium-zinc alloy exhibits an X-ray diffraction pattern which is substantially free of detectable unalloyed metal crystallite lines.
Claim 3
Dependent Claim
56 words
A catalyst composition in accordance with claim 1 wherein the atomic ratio of silver to cadmium in the alloy is in the range of between about 0.4 and 2.2 to 1, and the zinc is contained in the alloy in a quantity between about 0.01 and 15 weight percent, based on the total weight of alloy.
Claim 4
Dependent Claim
34 words
A catalyst composition in accordance with claim 1 wherein the quantity of carrier substrate in the catalyst is in the range between about 5 and 99.5 weight percent, based on the total catalyst weight.
Claim 5
Dependent Claim
14 words
A catalyst composition in accordance with claim 1 wherein the carrier substrate is alumina.
Claim 6
Dependent Claim
14 words
A catalyst composition in accordance with claim 1 wherein the carrier substrate is silica.
Claim 7
Dependent Claim
22 words
A catalyst composition in accordance with claim 1 wherein the silver-cadmium-zinc alloy consists of more than about 50 percent γ-phase silver-cadmium-zinc crystallites.
Claim 8
Dependent Claim
35 words
A catalyst composition in accordance with claim 1 wherein the silver-cadmium-zinc alloy consists substantially of α-phase silver-cadmium-zinc alloy crystallites, and the X-ray diffraction pattern of the α-phase silver-cadmium-zinc alloy crystallites does not exhibit line splitting.
Claim 9
Dependent Claim
38 words
A catalyst composition in accordance with claim 1 wherein the silver-cadmium-zinc alloy consists essentially of α-phase, γ-phase and ε-phase silver-cadmium-zinc alloy crystallites, and the X-ray diffraction pattern of the α-phase silver-cadmium-zinc alloy crystallites does not exhibit line splitting.
Claim 10
Dependent Claim
36 words
A catalyst in accordance with claim 1 wherein the silver-cadmium-zinc alloy consists essentially of α-phase and γ-phase silver-cadmium-zinc alloy crystallites, and the X-ray diffraction pattern of the α-phase silver-cadmium zinc crystallites does not exhibit line splitting.
Claim 11
Dependent Claim
118 words
An improved hydrogenation process for converting acrolein into allyl alcohol which comprises reacting acrolein with hydrogen in the vapor phase at a temperature between about 0° C and 300° C and a pressure between about 15 and 15,000 psi in the presence of a silver-cadmium-zinc alloy on a carrier substrate, wherein the atomic ratio of silver to cadmium in the alloy is in the range of between about 0.1 and 3 to 1, and the zinc is contained in the alloy in a quantity between about 0.001 and 30 weight percent, based on the total weight of alloy, and wherein the silver-cadmium-zinc alloy exhibits an X-ray diffraction pattern which is substantially free of detectable unalloyed metal crystallite lines.
Claim 12
Dependent Claim
118 words
An improved hydrogenation process for converting acrolein into allyl alcohol which comprises reacting acrolein with hydrogen in the vapor phase at a temperature between about 0° C and 300° C and a pressure between about 15 and 15,000 psi in the presence of a silver-cadmium-zinc alloy on a carrier substrate, wherein the atomic ratio of silver to cadmium in the alloy is in the range of between about 0.1 and 3 to 1, and the zinc is contained in the alloy in a quantity between about 0.001 and 30 weight percent, based on the total weight of alloy, and wherein the silver-cadmium-zinc alloy exhibits an X-ray diffraction pattern which is substantially free of detectable unalloyed metal crystallite lines.
References Cited (Backward Citations)
US2763696A
Cited
US3363982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |