US2847476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydration of acetylene using cadmium pyrophosphate catalyst
Assignee: Escambia Chemical Corp
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Filing: 1953-03-27
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Granted: 1958-08-12
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Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Steadman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:55
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/1808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD FOR HYDRATING ACETYLENES TO CARBONYL COMPOUNDS WHICH COMPRISES REACTING AN ACETYLENE WITH STEAM AT A TEMPERATURE BETWEEN 300* AND 440*C. IN THE PRESENCE OF A CADMIUM PYROPHOSPHATE CATALYST PREPARED BY HEATING CADMIUM AMMONIUM PHOSPHATE TO REMOVE AMMONIA AND WATER, THE HEATING BEING CONTINUED UNTIL THE REMAINING CADMIUM PHOSPHATE HAS THE EMPIRICAL FORMULA CD2P2O7, PELLETING THE RESULTING PYROPHOSPHATE WITH A VOLATILE ORGANIC LUBRICANT, AND HEATING THE PELLETS TO FORM A POROUS CATALYST STRUCTURE.
Claim 2
Independent Claim
74 words
THE METHOD FOR HYDRATING ACETYLENES TO CARBONYL COMPOUNDS WHICH COMPRISES REACTING AN ACETYLENE WITH STEAM AT A TEMPERATURE BETWEEN 300* AND 440*C. IN THE PRESENCE OF A CADMIUM PYROPHOSPHATE CATALYST PREPARED BY HEATING CADMIUM AMMONIUM PHOSPHATE TO REMOVE AMMONIA AND WATER, THE HEATING BEING CONTINUED UNTIL THE REMAINING CADMIUM PHOSPHATE HAS THE EMPIRICAL FORMULA CD2P2O7, PELLETING THE RESULTING PYROPHOSPHATE WITH A VOLATILE ORGANIC LUBRICANT, AND HEATING THE PELLETS TO FORM A POROUS CATALYST STRUCTURE.
References Cited (Backward Citations)
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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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |