Patent US2584861A successfully refreshed from Google Patents.
US2584861A
Expired / Lapsed
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Method of separating organic carboxylic acids from hydrocarbon oil compositions
Assignee: Shell Development Co
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Filing: 1949-11-18
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Granted: 1952-02-05
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Expires: 1969-11-18
Abstract
No abstract record available.
Inventors
- 👤 Garner Philip James
- 👤 Donovan Barry Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:26
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF SEPARATING AND RECOVERING OILSOLUBLE NAPHTHENIC ACIDS FROM MINERAL OIL REFINERY RESIDUES CONTAINING OIL-SOLUBLE METAL SALTS OF NAPHTHENIC ACIDS, WHICH METHOD COMPRISES ACIDIFYING SAID MINERAL OIL REFINERY RESIDUE TO CONVERT THE OIL-SOLUBLE METAL NAPHTHENATES TO OILSOLUBLE NAPHTHENIC ACIDS, CONTACTING THE ACIDIFIED OIL WHILE DISSOLVED IN A LIGHT PETROLEUM DISTILLATE FRACTION WITH AN AQUEOUS ALCOHOLIC SOLUTION OF COMPLEX CUPRIC ETHANOLAMINE SULFATE TO PRODUCE AN AQUEOUS ALCOHOLIC SOLUTION OF COMPLEX CUPRIC ETHANOLAMINE NAPHTHENATES, SEPARATING THE RESULTING AQUEOUS AND MINERAL OIL PHASES, ACIDIFYING THE SEPARATED AQUEOUS PHASE AND SEPARATING THE RESULTING LIBERATED WATER-INSOLUBLE NAPHTHENIC ACIDS FROM THE AQUEOUS PHASE.
Claim 2
Independent Claim
98 words
A METHOD OF SEPARATING AND RECOVERING OILSOLUBLE NAPHTHENIC ACIDS FROM MINERAL OIL REFINERY RESIDUES CONTAINING OIL-SOLUBLE METAL SALTS OF NAPHTHENIC ACIDS, WHICH METHOD COMPRISES ACIDIFYING SAID MINERAL OIL REFINERY RESIDUE TO CONVERT THE OIL-SOLUBLE METAL NAPHTHENATES TO OILSOLUBLE NAPHTHENIC ACIDS, CONTACTING THE ACIDIFIED OIL WHILE DISSOLVED IN A LIGHT PETROLEUM DISTILLATE FRACTION WITH AN AQUEOUS ALCOHOLIC SOLUTION OF COMPLEX CUPRIC ETHANOLAMINE SULFATE TO PRODUCE AN AQUEOUS ALCOHOLIC SOLUTION OF COMPLEX CUPRIC ETHANOLAMINE NAPHTHENATES, SEPARATING THE RESULTING AQUEOUS AND MINERAL OIL PHASES, ACIDIFYING THE SEPARATED AQUEOUS PHASE AND SEPARATING THE RESULTING LIBERATED WATER-INSOLUBLE NAPHTHENIC ACIDS FROM THE AQUEOUS PHASE.
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) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |