US2746843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydrogen cyanide
Assignee: Distillers Co Yeast Ltd
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Filing: 1952-10-28
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Granted: 1956-05-22
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Expires: 1972-10-28
Abstract
No abstract record available.
Inventors
- 👤 Bellringer Frederick James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0241
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
PROCESS FOR THE MANUFACTURE OF HYDROGEN CYANIDE WHICH COMPRISES PASSING A GASEOUS MIXTURE CONTAINING LESS THAN 5 LITRES OF VAPORISED ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF METHANOL AND FORMALDEHYDE IN 100 LITRES OF SAID MIXTURE, AMMONIA IN AN AMOUNT SUCH THAT THE MOLAR RATIO OF AMMONIA TO SAID ORGANIC COMPOUND IS MORE THAN 1, AND MORE THAN ONE MOLE OF FREE OXYGEN TO EACH ONE MOLE OF SAID ORGANIC COMPOUND CHARGE, AT A TEMPERATURE BETWEEN 340* AND 450* C. OVER A CATALYST COMPRISING MOLYBDENUM OXIDE, THE AMOUNT OF AMMONIA IN THE REACTANT GAS MIXTURE BEING SUCH THAT THE GASEOUS REACTION MIXTURE LEAVING THE REACTOR CONTAINS UNREACTED AMMONIA, NEUTRALISING SAID UNREACTED AMMONIA BEFORE THE ABSORPTION OF THE HYDROGEN CYANIDE PRODUCED AND RECOVERING FREE HYDROGEN CYANIDE BY DISTILLATION.
References Cited (Backward Citations)
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Cited
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US2006981A
Cited
US2429262A
Cited
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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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |