US4043946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of supported Raney nickel catalysts by reactive diffusion
Assignee: United States Department of the Interior
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Filing: 1976-07-30
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Granted: 1977-08-23
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Expires: 1996-07-30
Abstract
Abstract A method for making a supported Raney nickel catalyst by casting molten aluminum heated to about 850° C around a nickel substrate in a mold heated to about 1,050° C, retaining the metals in the mold at 1,050° C for about 30 seconds, allowing the mold to cool to ambient temperature, removing the casting from the mold and activating it by leaching with hot sodium hydroxide.
Inventors
- 👤 Philip E. Sanker
- 👤 Laurance L. Oden
- 👤 James H. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:14
CPC Classifications
B; B01; B01J; B01J25/00; B01J25/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A method for producing a Raney nickel catalyst which comprises: placing a nickel substrate within a mold cavity in a casting mold, the edge of the cavity being spaced about 0.5 to about 1.3 mm from the nickel substrate surface; heating the mold to a temperature of from about 950° C to about 1,050° C in a heating zone; pouring into said mold cavity molten aluminum heated to a temperature of about 700° to about 900° C to fill said cavity whereby the molten aluminum contacts the nickel substrate; continuing heating said mold in the heating zone for about 30 seconds after the pouring of the aluminum is completed; removing the mold from the heating zone; allowing the mold to cool to ambient temperature; removing from the mold a structure comprising a nickel substrate, a Ni 2 A1 3 intermediate layer and a NiA1 3 face; and leaching said structure with alkali metal caustic solution to form a Raney nickel catalyst.
Claim 2
Independent Claim
161 words
A method for producing a Raney nickel catalyst which comprises: placing a nickel substrate within a mold cavity in a casting mold, the edge of the cavity being spaced about 0.5 to about 1.3 mm from the nickel substrate surface; heating the mold to a temperature of from about 950° C to about 1,050° C in a heating zone; pouring into said mold cavity molten aluminum heated to a temperature of about 700° to about 900° C to fill said cavity whereby the molten aluminum contacts the nickel substrate; continuing heating said mold in the heating zone for about 30 seconds after the pouring of the aluminum is completed; removing the mold from the heating zone; allowing the mold to cool to ambient temperature; removing from the mold a structure comprising a nickel substrate, a Ni 2 A1 3 intermediate layer and a NiA1 3 face; and leaching said structure with alkali metal caustic solution to form a Raney nickel catalyst.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the mold is heated to 1,050° C.
Claim 4
Dependent Claim
17 words
The method of claim 2 wherein the molten aluminum is at a temperature of about 850° C.
Claim 5
Dependent Claim
21 words
The method of claim 3 wherein the edge of the mold cavity is about 1.3 mm from the nickel substrate surface.
Claim 6
Dependent Claim
20 words
The method of claim 4 wherein the structure is leached with sodium hydroxide solution to form a Raney nickel catalyst.
Claim 7
Dependent Claim
40 words
The method of claim 1 wherein the aluminum has present as a promoting element an element soluble in the molten aluminum selected from the group consisting of palladium, calcium, cerium, copper and magnesium, in an amount up to 5 wt%.
Claim 8
Dependent Claim
30 words
The method of claim 1 wherein the nickel substrate contains a promoter element selected from the group consisting of molybdenum, cobalt and rhenium in an amount up to 5 wt%.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |