Patent US3673116A successfully refreshed from Google Patents.
US3673116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Raney mixed catalyst
Assignee: Siemens AG
•
Filing: 1970-05-11
•
Granted: 1972-06-27
•
Expires: 1990-05-11
Abstract
Abstract A Raney mixed catalyst for use as a fuel cell electrode. The catalyst contains nickel, iron 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 one or two homogeneous quaternary phases.
Inventors
- 👤 Gerhard Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:41
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; B; B01; B01J; B01J25/00; B01J25/02; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
28 words
The Raney mixed catalyst of claim 1 comprising a homogeneous phase containing 38 to 75 percent nickel, 24 to 59 percent iron and 1.0 to 3.0 percent titanium.
Claim 2
Dependent Claim
17 words
The Raney mixed catalyst of claim 2 wherein the iron content is from 24 to 34 percent.
Claim 3
Dependent Claim
28 words
ThE Raney mixed catalyst of claim 1 comprising a homo-geneous phase containing 83 to 94 percent nickel, 5 to 14 percent iron and 1 to 3 percent titanium.
Claim 4
Dependent Claim
28 words
The Raney mixed catalyst of claim 1 comprising a homogeneous phase containing 72 to 89 percent nickel, 10 to 25 percent iron and 1 to 3 percent titanium.
Claim 5
Dependent Claim
28 words
The Raney mixed catalyst of claim 1 comprising a homogeneous phase containing 36 to 74 percent nickel, 24 to 59 percent iron and 2 to 5 percent zirconium.
Claim 6
Dependent Claim
16 words
The Raney mixed catalyst of claim 6 wherein the iron content is 25 to 34 percent
Claim 7
Dependent Claim
28 words
The Raney mixed catalyst of claim 1 comprising a homogeneous phase containing 81 to 93 percent nickel, 5 to 14 percent iron and 2 to 5 percent zirconium.
Claim 8
Dependent Claim
28 words
The Raney mixed catalyst of claim 1 comprising a homogeneous phase containing 70 to 88 percent nickel, 10 to 25 percent iron and 2 to 5 percent zirconium.
Claim 9
Dependent Claim
66 words
The process for preparing a Raney mixed catalyst comprising three active metals, said metals being nickel, iron and a third metal selected from titanium and zirconium, which comprises forming a Raney alloy of aluminum, nickel, iron and titanium or zirconium which consists, at least 80 percent, of one or two homogeneous quaternary phases and dissolving out the aluminum from the alloy by a metal hydroxide solution.
Claim 10
Dependent Claim
22 words
The process of claim 10, wherein the Raney alloy ,before dissolving out the aluminum, is tempered at a temperature below 850* C.
Claim 11
Dependent Claim
16 words
The process of claim 10, wherein the Raney alloy is oxidized after the dissolution of aluminum.
Claim 12
Dependent Claim
29 words
The process of claim 12, wherein an electrochemical oxidation results from an anodic polarization over 100 to 1,000 mV measured against a reversible hydrogen electrode in the same solution.
Claim 13
Dependent Claim
17 words
The process of claim 12, wherein the oxidation means is selected from air, oxygen or hydrogen peroxide.
Claim 14
Dependent Claim
41 words
The process of claim 10, wherein the Raney alloy consists at least 80 percent of a homogeneous quaternary phase containing 67 to 70 percent aluminum, 13 to 23 percent nickel, 8.0 to 18 percent iron and 0.3 to 1 percent titanium.
Claim 15
Dependent Claim
41 words
The process of claim 10 wherein the Raney alloy consists at least 80 percent of a homogeneous quaternary phase containing 58 to 60 percent aluminum, 33 to 39 percent nickel, 2 to 6 percent iron and 0.4 to 1.2 percent titanium.
Claim 16
Dependent Claim
41 words
The process of claim 10, wherein the Raney alloy consists at least 80 percent of a homogeneous quaternary phase containing 36 to 40 percent aluminum, 43 to 56 percent nickel, 6 to 16 percent iron and 0.6 to 1.8 percent titanium.
Claim 17
Dependent Claim
41 words
The process of claim 10, wherein the Raney alloy consists at least 80 percent of a homogeneous quaternary phase containing 67 to 70 percent aluminum, 12 to 23 percent nickel, 8 to 18 percent iron and 0.6 to 1.5 percent zirconium.
Claim 18
Dependent Claim
41 words
The process of claim 10, wherein the Raney alloy consists at least 80 percent of a homogeneous quaternary phase containing 58 to 60 percent aluminum, 32 to 39 percent nickel, 2 to 6 percent iron and 0.8 to 2 percent zirconium.
Claim 19
Dependent Claim
41 words
The process of claim 10, wherein the Raney alloy consists at least 80 percent of a homogeneous quaternary phase containing 36 to 40 percent aluminum, 42 to 56 percent nickel, 6 to 16 percent iron and 1.2 to 3 percent zirconium.
Claim 20
Dependent Claim
14 words
The method of claim 10, wherein the aluminum is dissolved out by anodic polarization.
References Cited (Backward Citations)
US2593250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |