Patent US2947774A successfully refreshed from Google Patents.
US2947774A
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Preparation of alkyl pyrophosphate extractants
Assignee: Individual
•
Filing: 1956-04-25
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Granted: 1960-08-02
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Expires: 1976-04-25
Abstract
No abstract record available.
Inventors
- 👤 Charles A Levine
- 👤 William E Skiens
- 👤 George R Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:44
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
106 words
A PROCESS COMPRISING MIXING P2O5 WITH A FIRST ORGANIC SOLVENT-DILUENT TO PRODUCE A SLURRY THEREWITH, ADDING TO SAID SLURRY AN ALCOHOL HAVING A CHAIN LENGTH IN THE RANGE OF 4 TO 17 CARBONS ATOMS AND AT A MOLE RATIO OF 2:1 WITH RESPECT TO SAID P2O5 TO REACT WITH SAID ALCOHOL TO PRODUCE A SOLUTION OF SAID EXTRACTANT COMPOUND HAVING A FINAL CONCENTRATION BELOW ABOUT 30* IN SAID SOLVENT, SEPARATING THE ALKYL PYROPHOSPHATE EXTRACTANT COMPOUND FROM SAID FIRST SOLVENT, AND THEN DILUTING SAID SEPARATED EXTRACTANT COMPOUND WITH A SECOND SOLVENT TO PROVIDE AN EXTRACTANT PHASE USED IN THE EXTRACTION OF METAL VALUES FROM AN AQUEOUS PHASE.
Claim 2
Dependent Claim
106 words
A PROCESS COMPRISING MIXING P2O5 WITH A FIRST ORGANIC SOLVENT-DILUENT TO PRODUCE A SLURRY THEREWITH, ADDING TO SAID SLURRY AN ALCOHOL HAVING A CHAIN LENGTH IN THE RANGE OF 4 TO 17 CARBONS ATOMS AND AT A MOLE RATIO OF 2:1 WITH RESPECT TO SAID P2O5 TO REACT WITH SAID ALCOHOL TO PRODUCE A SOLUTION OF SAID EXTRACTANT COMPOUND HAVING A FINAL CONCENTRATION BELOW ABOUT 30* IN SAID SOLVENT, SEPARATING THE ALKYL PYROPHOSPHATE EXTRACTANT COMPOUND FROM SAID FIRST SOLVENT, AND THEN DILUTING SAID SEPARATED EXTRACTANT COMPOUND WITH A SECOND SOLVENT TO PROVIDE AN EXTRACTANT PHASE USED IN THE EXTRACTION OF METAL VALUES FROM AN AQUEOUS PHASE.
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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |