US2552326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing tetraethyl pyrophosphate
Assignee: Monsanto Chemicals Ltd
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Filing: 1947-08-28
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Granted: 1951-05-08
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Expires: 1967-08-28
Abstract
No abstract record available.
Inventors
- 👤 Gennady M Kosolapoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:51
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A PROCESS FOR PRODUCING TETRAETHYL PYROPHOSPHATE BY THE REACTION OF 5 MOLES OF ETHANOL WITH 2 MOLES OF PHOSPHORYL CHLORIDE, WHEREIN THE INITIAL REACTION RESULTING IN THE FORMATION OF HC1 AND SUBSEQUENT SUBSTANTIALLY COMPLETE REMOVAL THEREOF FROM THE REACTION MIXTURE IS CARRIED OUT AT A TEMPERATURE BELOW 25* C., FOLLOWED BY A SUBSEQUENT TREATMENT AT A TEMPERATURE OF FROM 130* C. TO 150* C. RESULTING IN THE FORMATION AND VOLATILIZATION OF ETHYL CHLORIDE FROM THE REACTION MIXTURE, THE STEP OF TREATING, AT LEAST A TEMPERATURE BELOW AN ORGANIC AROMATIC LIQUID, WITH AN AQUEOUS SOLUTION OF A CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES.
Claim 2
Dependent Claim
107 words
IN A PROCESS FOR PRODUCING TETRAETHYL PYROPHOSPHATE BY THE REACTION OF 5 MOLES OF ETHANOL WITH 2 MOLES OF PHOSPHORYL CHLORIDE, WHEREIN THE INITIAL REACTION RESULTING IN THE FORMATION OF HC1 AND SUBSEQUENT SUBSTANTIALLY COMPLETE REMOVAL THEREOF FROM THE REACTION MIXTURE IS CARRIED OUT AT A TEMPERATURE BELOW 25* C., FOLLOWED BY A SUBSEQUENT TREATMENT AT A TEMPERATURE OF FROM 130* C. TO 150* C. RESULTING IN THE FORMATION AND VOLATILIZATION OF ETHYL CHLORIDE FROM THE REACTION MIXTURE, THE STEP OF TREATING, AT LEAST A TEMPERATURE BELOW AN ORGANIC AROMATIC LIQUID, WITH AN AQUEOUS SOLUTION OF A CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |