US2836622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of carbonyl fluoride
Assignee: EIDP Inc
•
Filing: 1955-02-18
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Granted: 1958-05-27
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Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 Charles W Tullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/70; C01B32/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE PROCESS FOR THE PREPARATION OF CARBONYL FLUORIDE, COF2, WHEREIN PHOSGENE IS REACTED WITH AT LEAST ONE MOLE, PER MOLE OF PHOSGENE, OF HYDROGEN FLUORIDE AT A TEMPERATURE OF AT LEAST 50*C., THE REACTION PRODUCT, CONTAINING CARBONYL FLUORIDE AND HYDROGEN CHLORIDE, IS BROUGHT INTO CONTACT AT TEMPERATURES ABOVE ABOUT O*C. WITH AT LEAST A STOICHIOMETRIC AMOUNT, BASED ON THE HYDROGEN CHLORIDE AND RESIDUAL HYDROGEN FLUORIDE THEREIN, OF AN INORGANIC CHEMICAL COMPOUND OF THE GROUP CONSISTING OF ALKALI METAL FLUORIDES, SULFUR TRIOXIDE AND PHOSPHORUS PENTOXIDE, SAID COMPOUND BEING UNREACTIVE WITH CARBONYL FLUORIDE BUT REACTIVE WITH HYDROGEN CHLORIDE TO FORM STABLE PRODUCTS; AND THE REACTION PRODUCTS ARE MAINTAINED IN CONTACT WITH SAID INORGANIC CHEMICAL COMPOUND UNTIL SUBSTANTIALLY ALL OF THE HYDROGEN CHLORIDE FORMED IN THE PHOSGENE-HYDROGEN FLUORIDE REACTION IS ABSORBED.
Claim 2
Dependent Claim
128 words
THE PROCESS FOR THE PREPARATION OF CARBONYL FLUORIDE, COF2, WHEREIN PHOSGENE IS REACTED WITH AT LEAST ONE MOLE, PER MOLE OF PHOSGENE, OF HYDROGEN FLUORIDE AT A TEMPERATURE OF AT LEAST 50*C., THE REACTION PRODUCT, CONTAINING CARBONYL FLUORIDE AND HYDROGEN CHLORIDE, IS BROUGHT INTO CONTACT AT TEMPERATURES ABOVE ABOUT O*C. WITH AT LEAST A STOICHIOMETRIC AMOUNT, BASED ON THE HYDROGEN CHLORIDE AND RESIDUAL HYDROGEN FLUORIDE THEREIN, OF AN INORGANIC CHEMICAL COMPOUND OF THE GROUP CONSISTING OF ALKALI METAL FLUORIDES, SULFUR TRIOXIDE AND PHOSPHORUS PENTOXIDE, SAID COMPOUND BEING UNREACTIVE WITH CARBONYL FLUORIDE BUT REACTIVE WITH HYDROGEN CHLORIDE TO FORM STABLE PRODUCTS; AND THE REACTION PRODUCTS ARE MAINTAINED IN CONTACT WITH SAID INORGANIC CHEMICAL COMPOUND UNTIL SUBSTANTIALLY ALL OF THE HYDROGEN CHLORIDE FORMED IN THE PHOSGENE-HYDROGEN FLUORIDE REACTION IS ABSORBED.
References Cited (Backward Citations)
US2526776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |