Patent US3674710A successfully refreshed from Google Patents.
US3674710A
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Raney mixed catalyst
Assignee: Siemens AG
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Filing: 1970-05-11
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Granted: 1972-07-04
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Expires: 1990-05-11
Abstract
Abstract A Raney mixed catalyst for use as a fuel cell electrode. The catalyst contains nickel, molybdenum and one of the metals titanium or zirconium. The catalyst is prepared from a Raney alloy, which contains aluminum as the inactive component. The alloy is in at least partially homogeneous quarternary phase.
Inventors
- 👤 Gerhard Richter
- 👤 Magdalena Kroes
- 👤 Angelika Frietzsche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:26
CPC Classifications
B; B01; B01J; B01J25/00; B01J25/02; B01J37/00; B01J37/34
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
30 words
The Raney mixed catalyst of claim 1 comprising 45 to 89.5 percent by weight nickel, 10 to 50 percent by weight molybdenum and 0.5 to 5 percent by weight titanium.
Claim 2
Dependent Claim
30 words
The Raney mixed catalyst of claim 1 comprising 63.5 to 71 percent by weight nickel, 28.5 to 34.6 percent by weight molybdenum and 1 to 2 percent by weight titanium.
Claim 3
Dependent Claim
28 words
The Raney mixed catalyst of claim 1 comprising 69 to 70 percent by weight nickel, 29 percent by weight molybdenum and 1 to 2 percent by weight titanium.
Claim 4
Dependent Claim
30 words
The Raney mixed catalyst of claim 1 comprising 44 to 89 percent by weight nickel, 10 to 50 percent by weight molybdenum and 1 to 12 percent by weight zirconium.
Claim 5
Dependent Claim
30 words
The Raney mixed catalyst of claim 1 comprising 63.3 to 71.2 percent by weight nickel, 28 to 33.9 percent by weight molybdenum and 2 to 4 percent by weight zirconium.
Claim 6
Dependent Claim
28 words
The Raney mixed catalyst of claim 1 comprising 67 to 69 percent by weight nickel, 29 percent by weight molybdenum and 2 to 4 percent by weight zirconium.
Claim 7
Dependent Claim
58 words
The process for preparing a Raney mixed catalyst comprising thrEe active metals, said metals being nickel, molybdenum and a third metal selected from titanium and zirconium which comprises forming a Raney alloy of aluminum, nickel, molybdenum and titanium or zirconium which consists, at least partially, of a homogeneous quarternary phase and dissolving out the aluminum from the alloy.
Claim 8
Dependent Claim
20 words
The process of claim 8, wherein the Raney alloy consists of at least 70 percent of a homogeneous quarternary phase.
Claim 9
Dependent Claim
16 words
The process of claim 8, wherein the Raney alloy is tempered before dissolving out the aluminum.
Claim 10
Dependent Claim
18 words
The process of claim 10, wherein the tempering is at a temperature of between 500* and 1,100* C.
Claim 11
Dependent Claim
16 words
The process of claim 8, wherein the Raney alloy is oxidized after the dissolution of aluminum.
Claim 12
Dependent Claim
18 words
The process of claim 12, wherein an electrochemical oxidation results from a polarization of 100 to 1,000 mV.
Claim 13
Dependent Claim
18 words
The process of claim 12, wherein an electrochemical oxidation results from a polarization of 100 to 150 mV.
Claim 14
Dependent Claim
17 words
The process of claim 12, wherein the oxidation means is selected from air, oxygen or hydrogen peroxide.
Claim 15
Dependent Claim
32 words
The process of claim 8, wherein the Raney alloy consists of 48 to 58 percent aluminum, 5 to 25 percent molybdenum, 20 to 45 percent nickel and 0.25 to 2.5 percent titanium.
Claim 16
Dependent Claim
43 words
The process of claim 16 wherein the Raney alloy consists of at least 70 percent of a homogeneous quarternary phase and contains 52 to 56 percent aluminum, 18 to 22 percent molybdenum, 23 to 27 percent nickel and 0.5 to 1.0 percent titanium.
Claim 17
Dependent Claim
31 words
The process of claim 17, wherein the Raney alloy is completely of a quarternary homogeneous phase and contains 53.4 percent aluminum, 20.4 percent molybdenum, 25.2 percent nickel and 1 percent titanium.
Claim 18
Dependent Claim
32 words
The process of claim 8, wherein the Raney alloy consists of 48 to 58 percent aluminum, 5 to 25 percent molybdenum, 20 to 45 percent nickel and 0.5 to 6 percent zirconium.
Claim 19
Dependent Claim
43 words
The process of claim 19, wherein the Raney alloy consists of at least 70 percent of a homogeneous quarternary phase and contains 52 to 56 percent aluminum, 18 to 22 percent molybdenum, 23 to 27 percent nickel and 1 to 2 percent zirconium.
Claim 20
Dependent Claim
30 words
The process of claim 20, wherein the Raney alloy is completely of a quarternary phase and contains 52.9 percent aluminum, 20.2 percent molybdenum, 24.9 percent nickel and 2 percent zirconium.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |