US2994720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction of diisopropyl ether from propylene sulfuric acid extracts
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-09-01
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Granted: 1961-08-01
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Expires: 1975-09-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Hakala
- 👤 Addison W Hubbard
- 👤 Walter R F Guyer
- 👤 Fred W Banes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:10
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A PROCESS FOR THE MANUFACTURE OF DIISOPROPYL ETHER WHEREIN PROPYLENE IS CONTACTED WITH 60-70 WT. PERCENT AQUEOUS SULFURIC ACID TO FORM AN ACID-PROPYLENE EXTRACT, THE IMPROVEMENT WHICH COMPRISES PROMPTLY HEAT SOAKING AT A TEMPERATURE IN THE RANGEE OF 160* TO 230*F. THE EXTRACT TO FORM DIISOPROPYL ETHER AND SIMULTANEOUSLY CONTACTING THE PROPYLENE EXTRACT IN AN EXTRACTION ZONE AT SAID TEMPERATURE WITH AN ETHER-SELECTIVE SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE AND ALKYL SUBSTITUTED BONS OF AT LEAST TEN CARBON ATOMS, NAPHTHENIC HYDROCARBONS, HALOGENATED AROMATICS, AND PHENYL ETHERS, FOR A PERIOD OF 30 TO 200 MINUTES, THEN SEPARATING THE ETHERPERIOD OF 60 TO 200 MINUTES, THEN SEPARATING THE ETHERCONTAINING SOLVENT EXTRACT FROM THE RESULTING ADMIXTURE SOLVENT FROM SAID SOLVENT EXTRACT.
Claim 2
Dependent Claim
121 words
IN A PROCESS FOR THE MANUFACTURE OF DIISOPROPYL ETHER WHEREIN PROPYLENE IS CONTACTED WITH 60-70 WT. PERCENT AQUEOUS SULFURIC ACID TO FORM AN ACID-PROPYLENE EXTRACT, THE IMPROVEMENT WHICH COMPRISES PROMPTLY HEAT SOAKING AT A TEMPERATURE IN THE RANGEE OF 160* TO 230*F. THE EXTRACT TO FORM DIISOPROPYL ETHER AND SIMULTANEOUSLY CONTACTING THE PROPYLENE EXTRACT IN AN EXTRACTION ZONE AT SAID TEMPERATURE WITH AN ETHER-SELECTIVE SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE AND ALKYL SUBSTITUTED BONS OF AT LEAST TEN CARBON ATOMS, NAPHTHENIC HYDROCARBONS, HALOGENATED AROMATICS, AND PHENYL ETHERS, FOR A PERIOD OF 30 TO 200 MINUTES, THEN SEPARATING THE ETHERPERIOD OF 60 TO 200 MINUTES, THEN SEPARATING THE ETHERCONTAINING SOLVENT EXTRACT FROM THE RESULTING ADMIXTURE SOLVENT FROM SAID SOLVENT EXTRACT.
References Cited (Backward Citations)
US2178186A
Cited
GB535111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |