US2518353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of oils
Assignee: Union Oil Company of California
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Filing: 1947-03-18
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Granted: 1950-08-08
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Expires: 1967-03-18
Abstract
No abstract record available.
Inventors
- 👤 Art C Mckinnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:13
CPC Classifications
C; C10; C10G; C10G31/00; C10G31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A CONTINUOUS PROCESS FOR THE SEPARATION OF NITROGEN BASES FROM HYDROCARBON OIL SOLUTIONS THEREOF WHICH COMPRISES COMBINING A VOLATILE BASE SELECTED FROM THE CLASS OF VOLATILE BASES CONSISTING OF AMMONIA AND THE MONO-, DI- AND TRIMETHYL AMINES AND A STRONG NON-VOLATILE POLYBASIC INORGANIC ACID IN THE PRESENCE OF WATER TO FORM AN AQUEOUS SOLUTIN OF THE NORMAL SALT OF SAID VOLATILE BASE AND SAID NON-VOLATILE ACID, HEATING SAID AQUEOUS SOLUTION AND EVAPORATING THEREBY A PORTION OF SAID VOLATILE BASE TO FORM AN AQUEOUS SOLUTION OF AN ACID SALT OF SAID VOLATILE BASE AND SAID NON-VOLATILE ACID, CONTACTING SAID HYDROCARBON OIL SOLTION OF NITROGEN BASES WITH SAID AQUEOUS SOLUTION OF SAID ACID SALT TO FORM A HYDROCARBON OIL RAFFINATE AND AN EXTRACT CONTAINING SAID NITROGEN BASES AS NORMAL NITROGEN BASE SALTS, SEPARATING SAID RAFFINATE FROM SAID EXTRACT, COMBINING SAID EXTRACT WITH THE EVAPORATED PORTION OF SAID VOLATILE BASE THEREBY REFORMING IN SOLUTION SAID NORMAL SALT AND LIBERATING SAID NITROGEN BASES, REMOVING THE LIBERATED NITROGEN BASES AND RETURNING THE SOLUTION OF NORMAL SALT FOR REUSE IN THE PROCESS.
Claim 2
Dependent Claim
176 words
A CONTINUOUS PROCESS FOR THE SEPARATION OF NITROGEN BASES FROM HYDROCARBON OIL SOLUTIONS THEREOF WHICH COMPRISES COMBINING A VOLATILE BASE SELECTED FROM THE CLASS OF VOLATILE BASES CONSISTING OF AMMONIA AND THE MONO-, DI- AND TRIMETHYL AMINES AND A STRONG NON-VOLATILE POLYBASIC INORGANIC ACID IN THE PRESENCE OF WATER TO FORM AN AQUEOUS SOLUTIN OF THE NORMAL SALT OF SAID VOLATILE BASE AND SAID NON-VOLATILE ACID, HEATING SAID AQUEOUS SOLUTION AND EVAPORATING THEREBY A PORTION OF SAID VOLATILE BASE TO FORM AN AQUEOUS SOLUTION OF AN ACID SALT OF SAID VOLATILE BASE AND SAID NON-VOLATILE ACID, CONTACTING SAID HYDROCARBON OIL SOLTION OF NITROGEN BASES WITH SAID AQUEOUS SOLUTION OF SAID ACID SALT TO FORM A HYDROCARBON OIL RAFFINATE AND AN EXTRACT CONTAINING SAID NITROGEN BASES AS NORMAL NITROGEN BASE SALTS, SEPARATING SAID RAFFINATE FROM SAID EXTRACT, COMBINING SAID EXTRACT WITH THE EVAPORATED PORTION OF SAID VOLATILE BASE THEREBY REFORMING IN SOLUTION SAID NORMAL SALT AND LIBERATING SAID NITROGEN BASES, REMOVING THE LIBERATED NITROGEN BASES AND RETURNING THE SOLUTION OF NORMAL SALT FOR REUSE IN THE PROCESS.
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |