US2842484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of hydrocarbons
Assignee: Union Oil Company of California
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Filing: 1954-12-30
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Granted: 1958-07-08
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond N Fleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:41
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD FOR RESOLVING A MIXTURE OF CLOSE-BOILING HYDROCARBONS WHICH DIFFER IN CARBON/HYDROGEN RATIO WHICH COMPRISES SUBJECTING SAID MIXTURE TO EXTRACTIVE DISTILLATION IN THE PRESENCE OF A SOLVENT CONSISTING ESSENTIALLY OF (1) A PRIMARY COMPONENT WHICH IS AN ALIPHATIC DINITRILE CONTAINING 3-7 CARBON ATOMS, AND (2) A SECONDARY COMPONENT SELECTED FROM THE GROUP CONSISTING OF MONO-NITRILES AND MONO-AMINES CONTAINING ONE NITROGEN ATOM AND 3 TO 10 CARBON ATOMS, EACH OF SAID SOLVENT COMPONENTS HAVING A BOILING POINT AT LEAST ABOUT 30*C. HIGHER THAN ANY OF SAID HYDROCARBONS, WHEREBY THE VOLATILITY OF THOSE HYDROCARBONS HAVING A RELATIVELY HIGH CARBON/HYDROGEN RATIO IS DECREASED RELATIVE TO THE VOLATILITY OF THOSE HYDROCARBONS HAVING A LOWER CARBON/HYDROGEN RATIO, RECOVERING OVERHEAD FROM SAID DISTILLATION A HYDROCARBON FRACTION HAVING A RELATIVELY LOW CARBON/ HYDROGEN RATIO, AND STRIPPING THE SOLVENT BOTTOMS FROM SAID DISTILLATION TO RECOVER A HYDROCARBON FRACTION HAVING A RELATIVELY HIGH CARBON/HYDROGEN RATIO.
Claim 2
Independent Claim
147 words
A METHOD FOR RESOLVING A MIXTURE OF CLOSE-BOILING HYDROCARBONS WHICH DIFFER IN CARBON/HYDROGEN RATIO WHICH COMPRISES SUBJECTING SAID MIXTURE TO EXTRACTIVE DISTILLATION IN THE PRESENCE OF A SOLVENT CONSISTING ESSENTIALLY OF (1) A PRIMARY COMPONENT WHICH IS AN ALIPHATIC DINITRILE CONTAINING 3-7 CARBON ATOMS, AND (2) A SECONDARY COMPONENT SELECTED FROM THE GROUP CONSISTING OF MONO-NITRILES AND MONO-AMINES CONTAINING ONE NITROGEN ATOM AND 3 TO 10 CARBON ATOMS, EACH OF SAID SOLVENT COMPONENTS HAVING A BOILING POINT AT LEAST ABOUT 30*C. HIGHER THAN ANY OF SAID HYDROCARBONS, WHEREBY THE VOLATILITY OF THOSE HYDROCARBONS HAVING A RELATIVELY HIGH CARBON/HYDROGEN RATIO IS DECREASED RELATIVE TO THE VOLATILITY OF THOSE HYDROCARBONS HAVING A LOWER CARBON/HYDROGEN RATIO, RECOVERING OVERHEAD FROM SAID DISTILLATION A HYDROCARBON FRACTION HAVING A RELATIVELY LOW CARBON/ HYDROGEN RATIO, AND STRIPPING THE SOLVENT BOTTOMS FROM SAID DISTILLATION TO RECOVER A HYDROCARBON FRACTION HAVING A RELATIVELY HIGH CARBON/HYDROGEN RATIO.
References Cited (Backward Citations)
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US2537459A
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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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |