US2698336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of crude wax oxidates
Assignee: Sinclair Refining Co
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Filing: 1950-08-16
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Granted: 1954-12-28
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Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 Nelson John Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:34
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN THE PURIFICATION OF CRUDE WAX ACID COMPOSITIONS CHARACTERIZED BY SAPONIFICATION NUMBERS IN THE RANGE OF ABOUT 100 TO 500, HIGH CONTENT OF FATTY ACIDS HAVING UPWARDS OF 18 CARBON ATOMS PER MOLECULE AND OBTAINED BY OXIDATION OF C34 TO C55 MICROCRYSTALLINE WAX, THE STEPS OF EXTRACTING THE CRUDE OXIDATE WITH A LOWER BOILING OXYGEN-CONTAINING ORGANIC POLAR SOLVENT AT A RATIO OF SOLVENT TO OXIDATE OF BETWEEN ABOUT 6:1 TO 10:1 BY WEIGHT AND UNDER CONDITIONS OF TEMPARATURE AND PRESSURE WHEREBY THE SOLVENT IS MAINTAINED IN LIQUID PHASE, SEPARATING THE EXTRACT PHASE, RECOVERING THE OXIDATE THEREFROM, EXTRACTING THE POLAR SOLVENT-EXTRACTED OXIDATED WITH A SATURATED HYDROCARBON SOLVENT OF THE GROUP CONTAINING THREE TO TWELVE CARBON ATOMS PER MOLECULE AT A RATIO OF SOLVENT TO OXIDATE BETWEEN ABOUT 2:1 TO 12:1 BY WEIGHT AND UNDER CONDITIONS OF TEMPERATURE AND PRESSURE WHEREBY THE SOLVENT IS MAINTAINED IN LIQUID PHASE, WASHING THE WAX OXIDATE WITH WATER AND A MINERAL ACID SUBSEQUENT TO AN EXTRACTION STEP, AND RECOVERING THE PURIFIED WAX ACIDS FROM THE SOLVENT MIXTURE.
Claim 2
Dependent Claim
171 words
IN THE PURIFICATION OF CRUDE WAX ACID COMPOSITIONS CHARACTERIZED BY SAPONIFICATION NUMBERS IN THE RANGE OF ABOUT 100 TO 500, HIGH CONTENT OF FATTY ACIDS HAVING UPWARDS OF 18 CARBON ATOMS PER MOLECULE AND OBTAINED BY OXIDATION OF C34 TO C55 MICROCRYSTALLINE WAX, THE STEPS OF EXTRACTING THE CRUDE OXIDATE WITH A LOWER BOILING OXYGEN-CONTAINING ORGANIC POLAR SOLVENT AT A RATIO OF SOLVENT TO OXIDATE OF BETWEEN ABOUT 6:1 TO 10:1 BY WEIGHT AND UNDER CONDITIONS OF TEMPARATURE AND PRESSURE WHEREBY THE SOLVENT IS MAINTAINED IN LIQUID PHASE, SEPARATING THE EXTRACT PHASE, RECOVERING THE OXIDATE THEREFROM, EXTRACTING THE POLAR SOLVENT-EXTRACTED OXIDATED WITH A SATURATED HYDROCARBON SOLVENT OF THE GROUP CONTAINING THREE TO TWELVE CARBON ATOMS PER MOLECULE AT A RATIO OF SOLVENT TO OXIDATE BETWEEN ABOUT 2:1 TO 12:1 BY WEIGHT AND UNDER CONDITIONS OF TEMPERATURE AND PRESSURE WHEREBY THE SOLVENT IS MAINTAINED IN LIQUID PHASE, WASHING THE WAX OXIDATE WITH WATER AND A MINERAL ACID SUBSEQUENT TO AN EXTRACTION STEP, AND RECOVERING THE PURIFIED WAX ACIDS FROM THE SOLVENT MIXTURE.
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US1885199A
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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) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |