US2556228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction for the separation of electrolytes
Assignee: Shell Development Co
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Filing: 1949-07-26
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Granted: 1951-06-12
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Expires: 1969-07-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Mott Souders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:52
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
PROCESS FOR SEPARATING A MIXTURE OF ORGANIC WATER-SOLUBLE ELECTROLYTES HAVING A TENDENCY TO CHANGE THEIR NUMBER OF PROTONS IN THE SAME DIRECTION WHEN DISSOLVED IN WATER, SAID ELECTROLYTES HAVING DIFFERENT DISSOCIATION CONSTANTS, INTO FRACTIONS CONTAINING SAID ELECTROLYTES IN DIFFERENT PROPORTIONS COMPRISING THE STEPS OF CONTACTING SAID MIXTURE IN AN EXTRACTION ZONE IN AQUEOUS SOLUTIONN WITH AN ORGANIC, AT LEAST PARTIALLY WATER-IMMISCIBLE SOLVENT FOR SAID ORGANIC ELECTROLYTES TO PRODUCE AN AQUEOUS PHASE AND A SOLVENT EXTRACT PHASE RICH IN THE ORGANIC SOLVENT; SEPARATING SAID PHASES; CONTACTING THE SEPARATED EXTRACT PHASE WITH SCRUBBING WATER AT A PH BETWEEN ABOUT 7+2 AND THAT OF THE AQUEOUS PHASE IN THE EXTRACTION ZONE TO PRODUCE A SCRUBBED EXTRACT PHASE AND AN ENRICHED WATER PHASE; SEPARATING THE LATTER PHASES; AND INTRODUCING SAID SEPARATED ENRICHED WATER PHASE INTO THE EXTRACTION ZONE.
Claim 2
Dependent Claim
134 words
PROCESS FOR SEPARATING A MIXTURE OF ORGANIC WATER-SOLUBLE ELECTROLYTES HAVING A TENDENCY TO CHANGE THEIR NUMBER OF PROTONS IN THE SAME DIRECTION WHEN DISSOLVED IN WATER, SAID ELECTROLYTES HAVING DIFFERENT DISSOCIATION CONSTANTS, INTO FRACTIONS CONTAINING SAID ELECTROLYTES IN DIFFERENT PROPORTIONS COMPRISING THE STEPS OF CONTACTING SAID MIXTURE IN AN EXTRACTION ZONE IN AQUEOUS SOLUTIONN WITH AN ORGANIC, AT LEAST PARTIALLY WATER-IMMISCIBLE SOLVENT FOR SAID ORGANIC ELECTROLYTES TO PRODUCE AN AQUEOUS PHASE AND A SOLVENT EXTRACT PHASE RICH IN THE ORGANIC SOLVENT; SEPARATING SAID PHASES; CONTACTING THE SEPARATED EXTRACT PHASE WITH SCRUBBING WATER AT A PH BETWEEN ABOUT 7+2 AND THAT OF THE AQUEOUS PHASE IN THE EXTRACTION ZONE TO PRODUCE A SCRUBBED EXTRACT PHASE AND AN ENRICHED WATER PHASE; SEPARATING THE LATTER PHASES; AND INTRODUCING SAID SEPARATED ENRICHED WATER PHASE INTO THE EXTRACTION ZONE.
Claim 3
Dependent Claim
121 words
PROCESS OF SEPARATING PENICILLIN FROM AN AQUEOUS ACIDIC SOLUTION CONTAINING IT TOGETHER WITH ORGANIC ACIDS HAVING DIFFERENT DISSOCIATION CONSTANTS, COMPRISING THE STEP OF CONTACTING SAID ACIDIC AQUEOUS SOLUTION WITH AN ORGANIC SOLVENT FOR PENICILLIN HAVING A SOLUBILITY IN WATER AT NORMAL ROOM TEMPERATURE LESS THAN ABOUT 25% TO PRODUCE AN AQUEOUS RAFFINATE PHASE AND A SOLVENT EXTRACT PHASE RICH IN SAID ORGANIC SOLVENT; SEPARATING SAID PHASES; SCRUBBING SAID SEPARATED SOLVENT EXTRACT PHASE IN A SCRUBBING ZONE WITH SCRUBBING WATER TO PRODUCE AN ENRICHED AQUEOUS PHASE IN EQUILIBRIUM WITH SAID SOLVENT EXTRACT PHASE, THE PH OF THE WATER BEING SUCH THAT THE SAID ENRICHED AQUEOUS PHASE HAS A PH BETWEEN THAT OF THE ORIGINAL AQUEOUS SOLUTION AND THAT OF SUBSTANTIALLY NUETRAL WATER.
Claim 4
Dependent Claim
121 words
PROCESS OF SEPARATING PENICILLIN FROM AN AQUEOUS ACIDIC SOLUTION CONTAINING IT TOGETHER WITH ORGANIC ACIDS HAVING DIFFERENT DISSOCIATION CONSTANTS, COMPRISING THE STEP OF CONTACTING SAID ACIDIC AQUEOUS SOLUTION WITH AN ORGANIC SOLVENT FOR PENICILLIN HAVING A SOLUBILITY IN WATER AT NORMAL ROOM TEMPERATURE LESS THAN ABOUT 25% TO PRODUCE AN AQUEOUS RAFFINATE PHASE AND A SOLVENT EXTRACT PHASE RICH IN SAID ORGANIC SOLVENT; SEPARATING SAID PHASES; SCRUBBING SAID SEPARATED SOLVENT EXTRACT PHASE IN A SCRUBBING ZONE WITH SCRUBBING WATER TO PRODUCE AN ENRICHED AQUEOUS PHASE IN EQUILIBRIUM WITH SAID SOLVENT EXTRACT PHASE, THE PH OF THE WATER BEING SUCH THAT THE SAID ENRICHED AQUEOUS PHASE HAS A PH BETWEEN THAT OF THE ORIGINAL AQUEOUS SOLUTION AND THAT OF SUBSTANTIALLY NUETRAL WATER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |