US2854468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of alkaline earth metal salts of mono- and dialkyl acid phosphates
Assignee: Shell Development Co
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Filing: 1954-01-07
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Granted: 1958-09-30
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Expires: 1974-01-07
Abstract
No abstract record available.
Inventors
- 👤 Max Nicolaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:23
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR THE SEPARATION OF A MONOALKYL ACID PHOSPHATE FROM A MIXTURE OF A MONOALKYL ACID PHOSPHATE AND A DIALKYL ACID PHOSPHATE, IN WHICH ACID PHOSPHATES EACH ALKYL GROUP CONTAINS FROM 7 TO 18 TO CARBON ATOMS, COMPRISING CONVERTING THE ALKYL-SUBSTITUTED ACID PHOSPLATES TO THE CORRESPONDING SALTS OF AN ALKALINE METAL HAVING AN ATOMIC NUMBER LESS THAN 40, REMOVING SUBSTANTIALLY ALL OF ANY WATER AND ALCOHOL PRESENT, SELECTIVELY EXTRACTING THE RESULTING MIXTURE OF SOLID ALKALINE EARTH METAL SALTS WITH A SOLVENT CONSISTING OF AT LEAST ONE LIQUID UNSUBSTITUTED SATURATED ALIPHATIC HYDROCARBON HAVING AN ELECTRIC DIPOLE MOMENT OF LESS THAN 1.0 DEBYE UNIT AND SEPARATING THE SOLID ALKALINE EARTH METAL SALT OF THE MONOALKYL ACID PHOSPHATE FROM THE RESULTING LIQUID PHASE, WHICH LIQUID PHASE COMPRISES A SOLUTION OF THE ALKALINE EARTH METAL SALT OF THE DIALKYL ACID PHOSPHATE IN THE SOLVENT.
Claim 2
Dependent Claim
141 words
A PROCESS FOR THE SEPARATION OF A MONOALKYL ACID PHOSPHATE FROM A MIXTURE OF A MONOALKYL ACID PHOSPHATE AND A DIALKYL ACID PHOSPHATE, IN WHICH ACID PHOSPHATES EACH ALKYL GROUP CONTAINS FROM 7 TO 18 TO CARBON ATOMS, COMPRISING CONVERTING THE ALKYL-SUBSTITUTED ACID PHOSPLATES TO THE CORRESPONDING SALTS OF AN ALKALINE METAL HAVING AN ATOMIC NUMBER LESS THAN 40, REMOVING SUBSTANTIALLY ALL OF ANY WATER AND ALCOHOL PRESENT, SELECTIVELY EXTRACTING THE RESULTING MIXTURE OF SOLID ALKALINE EARTH METAL SALTS WITH A SOLVENT CONSISTING OF AT LEAST ONE LIQUID UNSUBSTITUTED SATURATED ALIPHATIC HYDROCARBON HAVING AN ELECTRIC DIPOLE MOMENT OF LESS THAN 1.0 DEBYE UNIT AND SEPARATING THE SOLID ALKALINE EARTH METAL SALT OF THE MONOALKYL ACID PHOSPHATE FROM THE RESULTING LIQUID PHASE, WHICH LIQUID PHASE COMPRISES A SOLUTION OF THE ALKALINE EARTH METAL SALT OF THE DIALKYL ACID PHOSPHATE IN THE SOLVENT.
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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |