US3077491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of triarylphosphates
Assignee: FMC Corp
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Filing: 1959-10-26
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Granted: 1963-02-12
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Expires: 1979-10-26
Abstract
No abstract record available.
Inventors
- 👤 Seglin Leonard
- 👤 Sklar George
- 👤 Ralph A White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:25
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF MAKING A TRIARYLPHOSPHATE WHICH COMPRISES REACTING PHOSPHORUS OXYCHLORIDE AND A HYDROXYBENZENE SELECTED FROM THE GROUP CONSISTING OF PHENOL, ALKYL PHENOLS IN WHICH THE ALKYL GROUPS HAVE FROM 1 TO 4 CARBON ATOMS, MIXTURES OF SAID PHENOL WITH SAID ALKYL PHENOLS, AND MIXTURES OF SAID ALKYL PHENOLS, IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, MAGNESIUM CHLORIDE, ZINC CHLORIDE AND MIXTURES OF SAID CHLORIDES, DISTILLING THE REACTION MIXTURE AT A STILL POT TEMPERATURE OF FROM 220 TO 300*C. TO DRIVE OFF UNREACTED HYDROXYBENZENE AND THE BULK OF THE TRIARYLPHOSPHATE OVERHEAD, MIXING THE DISTILLATION RESIDUE FROM SAID DISTILLATION WITH SAID HYDROXYBENZENE AND PHOSPHOROUS OXYCHLORIDE AND THUS UTILIZING SAID DISTILLATION RESIDUE TO CATALYZE THE REACTION BETWEEN SAID HYDROXYBENZENE AND PHOSPHORUS OXYCHLORIDE TO PRODUCE ADDITIONAL QUANTITIES OF SAID TRIARYLPHOSPHATE.
Claim 2
Independent Claim
134 words
THE METHOD OF MAKING A TRIARYLPHOSPHATE WHICH COMPRISES REACTING PHOSPHORUS OXYCHLORIDE AND A HYDROXYBENZENE SELECTED FROM THE GROUP CONSISTING OF PHENOL, ALKYL PHENOLS IN WHICH THE ALKYL GROUPS HAVE FROM 1 TO 4 CARBON ATOMS, MIXTURES OF SAID PHENOL WITH SAID ALKYL PHENOLS, AND MIXTURES OF SAID ALKYL PHENOLS, IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, MAGNESIUM CHLORIDE, ZINC CHLORIDE AND MIXTURES OF SAID CHLORIDES, DISTILLING THE REACTION MIXTURE AT A STILL POT TEMPERATURE OF FROM 220 TO 300*C. TO DRIVE OFF UNREACTED HYDROXYBENZENE AND THE BULK OF THE TRIARYLPHOSPHATE OVERHEAD, MIXING THE DISTILLATION RESIDUE FROM SAID DISTILLATION WITH SAID HYDROXYBENZENE AND PHOSPHOROUS OXYCHLORIDE AND THUS UTILIZING SAID DISTILLATION RESIDUE TO CATALYZE THE REACTION BETWEEN SAID HYDROXYBENZENE AND PHOSPHORUS OXYCHLORIDE TO PRODUCE ADDITIONAL QUANTITIES OF SAID TRIARYLPHOSPHATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |