US2854473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing acrylonitrile
Assignee: Goodrich Corp
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Filing: 1957-03-26
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Granted: 1958-09-30
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Expires: 1977-03-26
Abstract
No abstract record available.
Inventors
- 👤 David C Spaulding
- 👤 Fred J Wherley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:18
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD FOR PREPARING ACRYLONITRILE WHICH COMPRISES PASSING A MIXTURE OF ACETYLENE AND HYDROGEN CYANIDE THROUGH A FLUIDIZABLE CATALYST MATERIAL COMPRISING ABOUT 30 TO 80 VOLUME PERCENT OF A CARBONACEOUS MATERIAL HAVING A PARTICLE SIZE OF ABOUT 0.1 TO 0.003 INCH AND CONTAINING ABOUT 1 TO 20 WEIGHT PERCENT OF AN ALKALI METAL HYDROXIDE AND ABOUT 70 TO 20 VOLUME PERCENT OF A MATERIAL HAVING AN AVERAGE PARTICLE SIZE FROM ABOUT 0.03 TO 0.0025 INCH SELECTED FROM THE CLASS CONSISTING OF SODIUM METASILICATE AND SAND AT A RATE SUFFICIENT TO FLUIDIZE SAID CATALYST MATERIAL AND AT A TEMPERATURE OF ABOUT 500 TO 640*C. AND THEREAFTER RECOVERING THE RESULTING ACRYLONITRILE.
Claim 2
Independent Claim
109 words
A METHOD FOR PREPARING ACRYLONITRILE WHICH COMPRISES PASSING A MIXTURE OF ACETYLENE AND HYDROGEN CYANIDE THROUGH A FLUIDIZABLE CATALYST MATERIAL COMPRISING ABOUT 30 TO 80 VOLUME PERCENT OF A CARBONACEOUS MATERIAL HAVING A PARTICLE SIZE OF ABOUT 0.1 TO 0.003 INCH AND CONTAINING ABOUT 1 TO 20 WEIGHT PERCENT OF AN ALKALI METAL HYDROXIDE AND ABOUT 70 TO 20 VOLUME PERCENT OF A MATERIAL HAVING AN AVERAGE PARTICLE SIZE FROM ABOUT 0.03 TO 0.0025 INCH SELECTED FROM THE CLASS CONSISTING OF SODIUM METASILICATE AND SAND AT A RATE SUFFICIENT TO FLUIDIZE SAID CATALYST MATERIAL AND AT A TEMPERATURE OF ABOUT 500 TO 640*C. AND THEREAFTER RECOVERING THE RESULTING ACRYLONITRILE.
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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |