US3226422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing unsaturated nitriles
Assignee: Knapsack AG
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Filing: 1964-04-15
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Granted: 1965-12-28
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Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Sennewald Kurt
- 👤 Vogt Wilhelm
- 👤 Kandler Joachim
- 👤 Sommerfeld Rolf
- 👤 Sorbe Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:51
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/005; B01J8/0055; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192; B01J8/18; B01J8/1836; B01J8/1845; B01J8/1863; B01J8/24; B01J8/245; B01J8/38; B01J8/384; B01J8/388; C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/00168; B01J2208/00256; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A ONE-STAGE PROCESS FOR THE MANUFACTURE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE BYREACTING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE, RESPECTIVELY, WITH A GAS MIXTURE OF AMMONIA AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF AIR AND OXYGEN AT ABOUT 300*C. TO 500*C. UNDER A PRESSURE OF ABOUT 0.3 TO 10 ABSOLUTE ATMOSPHERES ON CATALYSTS APPLIED TO A CARRIER SELECTED FROM THE GROUP CONSISTING OF SILICIC ACID, PULVERIZED PUMICE, KIESELGUHR, ALUMINUM OXIDE, SILICON CARBIDE AND MIXTURES THEREOF, AND WITH A RESIDENCE TIME ON THE CATALYST BETWEEN 0.2 AND 50 SECONDS, THE IMPROVEMENT OF CARRYING OUT SAID REACTION ON SAID CATALYST CONSISTING OF FE2O3, BI2O3, MOO3 AND P2O5, WITGH AN ATOMIC PORPORTION OF THE OXIDE FROMING ELEMENTS OF
Claim 2
Dependent Claim
129 words
IN A ONE-STAGE PROCESS FOR THE MANUFACTURE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE BYREACTING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE, RESPECTIVELY, WITH A GAS MIXTURE OF AMMONIA AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF AIR AND OXYGEN AT ABOUT 300*C. TO 500*C. UNDER A PRESSURE OF ABOUT 0.3 TO 10 ABSOLUTE ATMOSPHERES ON CATALYSTS APPLIED TO A CARRIER SELECTED FROM THE GROUP CONSISTING OF SILICIC ACID, PULVERIZED PUMICE, KIESELGUHR, ALUMINUM OXIDE, SILICON CARBIDE AND MIXTURES THEREOF, AND WITH A RESIDENCE TIME ON THE CATALYST BETWEEN 0.2 AND 50 SECONDS, THE IMPROVEMENT OF CARRYING OUT SAID REACTION ON SAID CATALYST CONSISTING OF FE2O3, BI2O3, MOO3 AND P2O5, WITGH AN ATOMIC PORPORTION OF THE OXIDE FROMING ELEMENTS OF
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |