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US4040980A
Expired / Lapsed
US
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Reduced copper catalyst on support
Assignee: Wyeth Holdings LLC
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Filing: 1975-11-28
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Granted: 1977-08-09
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Expires: 1995-11-28
Abstract
Abstract For making supported copper catalyst, useful in hydration of nitriles to produce amides, a cuprous compound e.g. cuprous chloride is impregnated into a support material, e.g. alumina, using acrylonitrile or acetonitrile as the imbibing solvent which is then removed by evaporation. The cuprous compound in the support is reduced to copper in situ, by contact with a reducing agent e.g. sodium borohydride.
Inventors
- 👤 Ken Matsuda
- 👤 William Austin Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:53
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A method of making reduced copper catalyst supported on a water-insoluble, porous catalyst support, said method comprising the steps: a. impregnating said catalyst support with a solution of cuprous compound dissolved in a solvent selected from acetonitrile and acrylonitrile, and b. evaporating the solvent from the support, leaving cuprous compound deposited on the support, and c. reducing the cuprous compound on the support to copper in situ by contacting the impregnated support with a reducing agent.
Claim 2
Independent Claim
76 words
A method of making reduced copper catalyst supported on a water-insoluble, porous catalyst support, said method comprising the steps: a. impregnating said catalyst support with a solution of cuprous compound dissolved in a solvent selected from acetonitrile and acrylonitrile, and b. evaporating the solvent from the support, leaving cuprous compound deposited on the support, and c. reducing the cuprous compound on the support to copper in situ by contacting the impregnated support with a reducing agent.
Claim 3
Dependent Claim
16 words
A method defined by claim 1 wherein the reducing agent is aqueous solution of sodium borohydride.
Claim 4
Dependent Claim
13 words
A method defined by claim 1 wherein the cuprous compound is cuprous chloride.
Claim 5
Dependent Claim
16 words
A method defined by claim 2 wherein the defined aqueous solution of borohydride contains sodium hydroxide.
Claim 6
Dependent Claim
13 words
A method defined in claim 1 wherein the defined catalyst support is alumina.
Claim 7
Dependent Claim
13 words
A method defined by claim 2 wherein the cuprous compound is cuprous chloride.
Claim 8
Dependent Claim
21 words
A method defined by claim 1 wherein the steps (a) and (b) are repeated before the step (c) is carried out.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |