US2541458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of nitrogen bases
Assignee: Union Oil Company of California
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Filing: 1945-07-09
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Granted: 1951-02-13
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Expires: 1965-07-09
Abstract
No abstract record available.
Inventors
- 👤 Clyde H O Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:20
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/14; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS OF RECOVERING NITROGEN BASES OF A PLURALITY OF TYPES FROM HYDROGEN FRACTIONS CONTAINING THE SAME WHICH COMPRISES EXTRACTING THE HYDROCARBON FRACTION WITH AN EXTRACTIVE SOLVENT COMPRISING AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE CLASS OF COMPOUNDS CONSISTING OF THE VOLATILE ACIDS BOILING BELOW ABOUT 200* C. AND THE NON-VOLATILE ACID SALTS HAVING A REPLACEABLE HYDROGEN AND A MUTUAL SOLVENT FOR SAID EXTRACTIVE SOLVENT AND HYDROCARBONS COMPRISING A COMPOUND SELECTED FROM THE CLASS OF COMPOUNDS CONSISTING OF THE LOW MOLECULAR WEIGHT MONOHYDRIC ALCOHOLS AND KETONES TO REMOVE THE NITROGEN BASES SUBSTANTIALLY COMPLETELY FROM SAID HYDROCARBON FRACTION, WATER WASHING THE EXTRACTED HYDROCARBON RAFFINATE, COMBINING THE RESULTING WASH WATER WITH THE EXTRACT PHASE, SEPARATING THE NITROGEN BASES FROM THE EXTRA AND REUSING THE WATER, SELECTIVE SOLVENT AND MUTUAL SOLVENT IN THE EXTRACTION.
Claim 2
Dependent Claim
133 words
A PROCESS OF RECOVERING NITROGEN BASES OF A PLURALITY OF TYPES FROM HYDROGEN FRACTIONS CONTAINING THE SAME WHICH COMPRISES EXTRACTING THE HYDROCARBON FRACTION WITH AN EXTRACTIVE SOLVENT COMPRISING AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE CLASS OF COMPOUNDS CONSISTING OF THE VOLATILE ACIDS BOILING BELOW ABOUT 200* C. AND THE NON-VOLATILE ACID SALTS HAVING A REPLACEABLE HYDROGEN AND A MUTUAL SOLVENT FOR SAID EXTRACTIVE SOLVENT AND HYDROCARBONS COMPRISING A COMPOUND SELECTED FROM THE CLASS OF COMPOUNDS CONSISTING OF THE LOW MOLECULAR WEIGHT MONOHYDRIC ALCOHOLS AND KETONES TO REMOVE THE NITROGEN BASES SUBSTANTIALLY COMPLETELY FROM SAID HYDROCARBON FRACTION, WATER WASHING THE EXTRACTED HYDROCARBON RAFFINATE, COMBINING THE RESULTING WASH WATER WITH THE EXTRACT PHASE, SEPARATING THE NITROGEN BASES FROM THE EXTRA AND REUSING THE WATER, SELECTIVE SOLVENT AND MUTUAL SOLVENT IN THE EXTRACTION.
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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |