US2805244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acrylonitrile
Assignee: Escambia Chemical Corp
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Filing: 1954-11-29
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Granted: 1957-09-03
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Expires: 1974-11-29
Abstract
No abstract record available.
Inventors
- 👤 Jr James F Gabbett
- 👤 Thomas R Steadman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:46
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE PROCESS OF PRODUCING ACRYLONITRILE FROM THE HYDROGEN CYANIDE AND AN ACETYLENE STREAM WHICH COMPRISES PASSING AN ACETYLENE STREAM CONTAINING LESS THAN ABOUT 5 PERCENT OXYGEN OVER CHARCOAL HEATED TO A TEMPERATURE BETWEEN ABOUT 175*C. AND THE TEMPERATURE AT WHICH ACETYLENE BEINGS TO OXIDIXE TO EFFECT SUBSTANTIALLY COMPLETE REMOVAL OF OXYGEN FROM SAID ACETYLENE STREAM, PASSING THE RESULTANT OXYGEN-FREE ACETYLENE STREAM AND HYDROGEN CYANIDE OVER A SUPPORT CARRYING A CATALYST SELECTED FROM ATHE GROUP CAONSISTING OF THE ALKALI METAL HYDROXIDES, CYANIDES AND CARBONATES MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 450*C. AND 700*C. AND RECOVERING THE ACRYLONITRILE PRODUCED.
Claim 2
Dependent Claim
97 words
THE PROCESS OF PRODUCING ACRYLONITRILE FROM THE HYDROGEN CYANIDE AND AN ACETYLENE STREAM WHICH COMPRISES PASSING AN ACETYLENE STREAM CONTAINING LESS THAN ABOUT 5 PERCENT OXYGEN OVER CHARCOAL HEATED TO A TEMPERATURE BETWEEN ABOUT 175*C. AND THE TEMPERATURE AT WHICH ACETYLENE BEINGS TO OXIDIXE TO EFFECT SUBSTANTIALLY COMPLETE REMOVAL OF OXYGEN FROM SAID ACETYLENE STREAM, PASSING THE RESULTANT OXYGEN-FREE ACETYLENE STREAM AND HYDROGEN CYANIDE OVER A SUPPORT CARRYING A CATALYST SELECTED FROM ATHE GROUP CAONSISTING OF THE ALKALI METAL HYDROXIDES, CYANIDES AND CARBONATES MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 450*C. AND 700*C. AND RECOVERING THE ACRYLONITRILE PRODUCED.
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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |