US2567228A
Expired / Lapsed
US
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Extractive distillation of closeboiling hydrocarbon fractions with hydrotropic solutions
Assignee: Standard Oil Development Co
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Filing: 1949-01-03
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Granted: 1951-09-11
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Expires: 1969-01-03
Abstract
No abstract record available.
Inventors
- 👤 Charles E Morrell
- 👤 Carl S Carlson
- 👤 Joseph F Nelson
- 👤 Stewart Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:22
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR THE SEPARATION OF CLOSE-BOILING HYDROCARBONS WHICH COMPRISES SUBJECTING A HYDROCARBON MIXTURE HAVING A BOILING RANGE OF NOT MORE THAN 50 DEGREES ON THE CENTIGRADE SCALE TO EXTRACTIVE DISTILLATION USING AS EXTRACTION SOLVENT AN AQUEOUS MIXTURE CONTAINING IN SOLUTION AT LEAST 40 PER CENT BY WEIGHT OF A HYDROTROPIC ORGANIC SOLUBILIZER CONSISTING ESSENTIALLY OF A SALT, CONTAINING AT LEAST ONE CYCLIC NUCLEUS AND HAVING AT LEAST ONE WATER SOLUBILIZING GROUP, WHEREBY THE RELATIVE VOLATILITIES OF THE COMPONENTS OF
Claim 2
Dependent Claim
80 words
A PROCESS FOR THE SEPARATION OF CLOSE-BOILING HYDROCARBONS WHICH COMPRISES SUBJECTING A HYDROCARBON MIXTURE HAVING A BOILING RANGE OF NOT MORE THAN 50 DEGREES ON THE CENTIGRADE SCALE TO EXTRACTIVE DISTILLATION USING AS EXTRACTION SOLVENT AN AQUEOUS MIXTURE CONTAINING IN SOLUTION AT LEAST 40 PER CENT BY WEIGHT OF A HYDROTROPIC ORGANIC SOLUBILIZER CONSISTING ESSENTIALLY OF A SALT, CONTAINING AT LEAST ONE CYCLIC NUCLEUS AND HAVING AT LEAST ONE WATER SOLUBILIZING GROUP, WHEREBY THE RELATIVE VOLATILITIES OF THE COMPONENTS OF
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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |