Patent US512269A successfully refreshed from Google Patents.
Patent US3296097A successfully refreshed from Google Patents.
US3296097A
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Predictive control of distillation column internal reflux
Assignee: Phillips Petroleum Co
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Filing: 1962-04-23
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Granted: 1967-01-03
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Expires: 1982-04-23
Abstract
No abstract record available.
Inventors
- 👤 Dale E Lupfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:10
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A PROCESS WHEREIN A MULTICOMPONENT FEED STREAM IS SEPARATED IN A FRACTIONAL DISTILLATION COLUMN INTO AN OVERHEAD VAPOR STREAM AND A LIQUID BOTTOM PRODUCT STREAM HAVING A SPECIFIED PURITY, SAID OVERHEAD STREAM IS CONDENSED, SOME OF THE CONDENSED OVERHEAD IS RECYCLED TO SAID COLUMN AS AN EXTERNAL REFLUX STREAM, AND SOME OF SAID CONDENSED OVERHEAD IS YIELDED AS A DISTILLATE PRODUCT STREAM HAVING A SPECIFIED PURITY, A CONTROL METHOD THEREFOR COMPRISING THE STEPS OF MEASURING A PROCESS VARIABLE INDICATIVE OF THE FLOW RATE OF SAID FEED STREAM; MEASURING THE AMOUNTS OF FEED COMPONENTS IN SAID EED STREAM; PRODUCING SIGNALS PROPORTIONAL TO SAID MEASUREMENTS; COMBINING SAID SIGNALS TOGETHER WITH SIGNALS PROPORTIONAL TO CONSTANTS IN A STATISTICALLY DERIVED EQUATION BASED ON THE EXPRESSION:
Claim 2
Dependent Claim
122 words
IN A PROCESS WHEREIN A MULTICOMPONENT FEED STREAM IS SEPARATED IN A FRACTIONAL DISTILLATION COLUMN INTO AN OVERHEAD VAPOR STREAM AND A LIQUID BOTTOM PRODUCT STREAM HAVING A SPECIFIED PURITY, SAID OVERHEAD STREAM IS CONDENSED, SOME OF THE CONDENSED OVERHEAD IS RECYCLED TO SAID COLUMN AS AN EXTERNAL REFLUX STREAM, AND SOME OF SAID CONDENSED OVERHEAD IS YIELDED AS A DISTILLATE PRODUCT STREAM HAVING A SPECIFIED PURITY, A CONTROL METHOD THEREFOR COMPRISING THE STEPS OF MEASURING A PROCESS VARIABLE INDICATIVE OF THE FLOW RATE OF SAID FEED STREAM; MEASURING THE AMOUNTS OF FEED COMPONENTS IN SAID EED STREAM; PRODUCING SIGNALS PROPORTIONAL TO SAID MEASUREMENTS; COMBINING SAID SIGNALS TOGETHER WITH SIGNALS PROPORTIONAL TO CONSTANTS IN A STATISTICALLY DERIVED EQUATION BASED ON THE EXPRESSION:
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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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |