US3789074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle size-ph effects on reduced copper oxide in preparation of acrylamide
Assignee: ChampionX LLC
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Filing: 1972-06-23
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Granted: 1974-01-29
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Expires: 1992-06-23
Abstract
Abstract A process for catalytically hydrolyzing a nitrile to the corresponding amide by contacting a nitrile with an improved reduced copper oxide catalyst.
Inventors
- 👤 V Seale
- 👤 J Svarz
- 👤 L Goretta
- 👤 F Sibert
- 👤 J Newkirk
- 👤 W Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:22
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/72; B01J37/00; B01J37/16; B01J37/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
A process for catalytically hydrolyzing a nitrile from the group consisting of acrylonitrile and methacrylonitrile to the corresponding amide by contacting a reactant feed of nitrile in the presence of water with a reduced copper oxide catalyst; the improvement which comprises preparing said reduced copper oxide catalyst by the following steps: A. preparing a 5 to 20 percent by weight aqueous slurry of copper oxide, said slurry having a pH within the range 9 to 10.5 percent said copper oxide characterized as having a surface area within the range 20 to 100 M2/g; B. reducing said slurry of copper oxide of step (A) in a hydrogen atmosphere to prepare a reduced copper oxide catalyst; and then C. treating the nitrile with said catalyst prepared in step (B) to form the amide.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |