US2867645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkali metal salts of diesters of phosphoric acid
Assignee: Shell Development Co
•
Filing: 1955-01-17
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Granted: 1959-01-06
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Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 Willem Van Eijk
- 👤 Germain Ernest George
- 👤 Max Nicolaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/11; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A PROCESS FOR PREPARING AN ALKALI METAL DIALKYL PHOSPHATE BY REACTING A PHOSPHORUS OXYHALIDE WITH AN ALKANOL HAVING BETWEEN 4 AND 17 CARBON ATOMS IN THE PRESENCE OF AN INERT LIQUID WATER-IMMISCIBLE ALIPHATIC DILUENT SELECTED FROM THE GROUP CONSISTING OF ALKANES AND HALOGENATED ALKANES HAVING BOILING POINTS BETWEEN ABOUT 50* AND ABOUT 170* C., AND MIXTURE THEREOF AND THEREAFTER REACTING THE RESULTING DIALKYL PHOSPHORYL HALIDE WITH AN AQUEOUS SOLUTION OF AN ALAKLI METAL BASE TO HYDROLYZE SAID PHOSPHORYL HALIDE TO THE CORRESPONDING ACID AND TO NEUTRALIZE SAID CORRESPONDING ACID, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE REACTION OF THE PHOSPHORYI HALIDE WITH THE AQUEOUS SOLUTION OF THE ALKALI METAL BASE IN THE PRESENCE OF THE SAME INERT LIQUID WATERIMMISCIBLE ALIPHATIC DILUENT USED IN THE PREPARATION OF THE DIALKYL PHOSPORYL HALIDE SO THAT A SYSTEM CONSISTING ONLY OF TWO LIQUID PHASES IS FORMED.
Claim 2
Dependent Claim
142 words
IN A PROCESS FOR PREPARING AN ALKALI METAL DIALKYL PHOSPHATE BY REACTING A PHOSPHORUS OXYHALIDE WITH AN ALKANOL HAVING BETWEEN 4 AND 17 CARBON ATOMS IN THE PRESENCE OF AN INERT LIQUID WATER-IMMISCIBLE ALIPHATIC DILUENT SELECTED FROM THE GROUP CONSISTING OF ALKANES AND HALOGENATED ALKANES HAVING BOILING POINTS BETWEEN ABOUT 50* AND ABOUT 170* C., AND MIXTURE THEREOF AND THEREAFTER REACTING THE RESULTING DIALKYL PHOSPHORYL HALIDE WITH AN AQUEOUS SOLUTION OF AN ALAKLI METAL BASE TO HYDROLYZE SAID PHOSPHORYL HALIDE TO THE CORRESPONDING ACID AND TO NEUTRALIZE SAID CORRESPONDING ACID, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE REACTION OF THE PHOSPHORYI HALIDE WITH THE AQUEOUS SOLUTION OF THE ALKALI METAL BASE IN THE PRESENCE OF THE SAME INERT LIQUID WATERIMMISCIBLE ALIPHATIC DILUENT USED IN THE PREPARATION OF THE DIALKYL PHOSPORYL HALIDE SO THAT A SYSTEM CONSISTING ONLY OF TWO LIQUID PHASES IS FORMED.
References Cited (Backward Citations)
US2005619A
Cited
US2624750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |