US3631104A
Expired / Lapsed
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Catalysts for the hydration of nitriles to amides
Assignee: Dow Chemical Co
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Filing: 1969-06-23
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Granted: 1971-12-28
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Expires: 1989-06-23
Abstract
Abstract COPPER OXIDE, COPPER-CHROMIUM OXIDE, COPPERMOLYBDENUM OXIDE OR MIXTURES THEREOF HAVE BEEN FOUND TO BE EXCELLENT HETEROGENEOUS CATALYSTS FOR THE CONVERSION OF NITRILES IN THE PRESENCE OF WATER TO THE CORRESPONDING AMIDES. USING ONE SUCH CATALYST IN A CORRESPONDING ACTOR, ACRYLONITRILE WAS ALMOST 100% CONVERTED TO ACRYLAMIDE DURING MORE THAN SIX WEEKS OF CONTINUOUS OPERATION.
Inventors
- 👤 Clarence E Habermann
- 👤 Ben A Tefertiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:56
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; B01J23/16; B01J23/24; B01J23/26; B01J23/72; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |