Process control for extractive distillation operation having a constant take-off volume product stream
Abstract
Abstract A process for the continuous separation of a feed mixture in a separation zone having a plurality of product streams withdrawn from said separation zone, at least one of said product streams being withdrawn from an upper region of said separation zone and at least one of said product streams being withdrawn from a lower region of said separation zone, said process comprising passing said feed mixture to a column in said separation zone, setting at least one of said product streams of said column at a constant takeoff volume, measuring a property representative of the composition of one of said product streams and converting said measurement to a signal representative of said measurement and using said signal to manipulate the flow rate of said feed mixture in response to such measurement such that such measurement remains substantially constant at a predetermined value.
Inventors
- 👤 George A Mcneill
- 👤 Jerry D Sacks
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |