Patent US2621204A successfully refreshed from Google Patents.
US2621204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acrylonitrile
Assignee: Celanese Corp
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Filing: 1950-01-26
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Granted: 1952-12-09
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Expires: 1970-01-26
Abstract
No abstract record available.
Inventors
- 👤 Alexander F Maclean
- 👤 Donald E Pickart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:46
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A PROCESS FOR THE PRODUCTION OF ACRYLONITRILE WHEREBY A MIXTURE OF HYDROGEN CYANIDE AND ACETYLENE IS PASSED THROUGH AN AQUEOUS SOLUTION OF A CATALYST FOR SAID REACTION, THE STEPS WHICH COMPRISE PASSING THE MIXTURE OF REACTION GASES FROMED BY SAID REACTON AND THE AQUEOUS CATALYST SOLUTION THROUGH AN AROMATIC LIQUID HYDROCARBON ABSORBENT IN WHICH THE AQUESOUS CATALYST SOLUTION IS INSOLUBLE, ABSORBING THE ACRYLONITRILE IN THE ABSORBENT SO AS TO SEPARATE THE ACRYLONITRILE AS FORMED FROM BOTH THE AQUEOUS SOLUTION AND THE UNREACTED HYDROGEN CYANIDE AND ACETYLENE, AND SEPARATING THE ACRYLONITRILE FROM THE LIQUID ABSORBENT.
Claim 2
Dependent Claim
95 words
IN A PROCESS FOR THE PRODUCTION OF ACRYLONITRILE WHEREBY A MIXTURE OF HYDROGEN CYANIDE AND ACETYLENE IS PASSED THROUGH AN AQUEOUS SOLUTION OF A CATALYST FOR SAID REACTION, THE STEPS WHICH COMPRISE PASSING THE MIXTURE OF REACTION GASES FROMED BY SAID REACTON AND THE AQUEOUS CATALYST SOLUTION THROUGH AN AROMATIC LIQUID HYDROCARBON ABSORBENT IN WHICH THE AQUESOUS CATALYST SOLUTION IS INSOLUBLE, ABSORBING THE ACRYLONITRILE IN THE ABSORBENT SO AS TO SEPARATE THE ACRYLONITRILE AS FORMED FROM BOTH THE AQUEOUS SOLUTION AND THE UNREACTED HYDROGEN CYANIDE AND ACETYLENE, AND SEPARATING THE ACRYLONITRILE FROM THE LIQUID ABSORBENT.
References Cited (Backward Citations)
US2404163A
Cited
US2324854A
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US2500403A
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US2409124A
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US2385327A
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US2392303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |