US3686077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for separating liquids
Assignee: Stamicarbon BV
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Filing: 1970-04-01
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Granted: 1972-08-22
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Expires: 1990-04-01
Abstract
Abstract A PROCESS FOR THE SEPARATION OF LOWER BOILING POINT LIQUIDS FROM THOSE OF A HIGH BOILING POINT, AND APPARATUS THEREFOR IS DISCLOSED. THE LIQUID MIXTURE IS SUPPLIED TO THE BASE OF THE EXTRACTOR AND PASSED UPWARDS UNDER CONTROLLED TEMPERATURE AND REDUCED PRESSURE IN THE VAPOR STATE THROUGH SEVERAL TUBES, WHOSE LENGTH IS FROM 15 TO 35 TIMES THEIR DIAMETER; THE VAPOR LEAVES THE TUBES AT A VELOCITY APPROACHING THE VELOCITY OF SOUND IN THE VAPOR, AND IS SUBSEQUENTLY CONDENSED. THE LOWER BOILING LIQUID THUS RECOVERED IS OF HIGH PURITY, OFTEN REPRESENTING UP TO 90% OF THE TOTAL LOWER BOILING FRACTION OF THE MIXTURE ENTERING THE EVAPORATOR.
Inventors
- 👤 Hendrik De Koning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:15
CPC Classifications
C; C07; C07D; C07D201/00; C07D201/16; B; B01; B01D; B01D1/00; B01D1/06; B01D1/10; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |