Patent EP0129304A2 successfully refreshed from Google Patents.
US2768942A
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US
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Adsorptive distillation process
Assignee: Shell Development Co
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Filing: 1954-07-01
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Granted: 1956-10-30
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Expires: 1974-07-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Stanley Marple
- 👤 Norbert J Foecking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:34
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/143; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B01D15/1807; C; C10; C10G; C10G25/00; C10G25/06; C10G25/11; B01D15/20; B01D15/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF SEPARATING ORGANIC SUBSTANCES WHICH FORM CLOSE-BOILING MIXTURES DIFFICULT TO SEPARATE BY ORDINARY FRACTIONAL DISTILLATION, WHICH COMPRISES ADSORPTIVELY DISTILLING A FEED MIXTURE OF SAID SUBSTANCES WHILE CONTACTING IT WITH A DESCENDING COUNTERCURRENTLY FLOWING SLURRY OF A SOLID ADSORBENT AND AT LEAST AN EQUAL PROPORTION OF LIQUID WHICH IS AT LEAST 25* C. HIGHER BOILING THAN THE END BOILING POINT OF THE MIXTURE OF ORGANIC SUBSTANCES AND WHICH IS OF THE SAME CHEMICAL CLASS AS THE ONE OF THE ORGANIC SUBSTANCES WHICH IS LESS READILY ADSORBED BY THE ADSORBENT, AND CONTINUOUSLY REMOVING AN OVERHEAD VAPOR
Claim 2
Independent Claim
96 words
THE METHOD OF SEPARATING ORGANIC SUBSTANCES WHICH FORM CLOSE-BOILING MIXTURES DIFFICULT TO SEPARATE BY ORDINARY FRACTIONAL DISTILLATION, WHICH COMPRISES ADSORPTIVELY DISTILLING A FEED MIXTURE OF SAID SUBSTANCES WHILE CONTACTING IT WITH A DESCENDING COUNTERCURRENTLY FLOWING SLURRY OF A SOLID ADSORBENT AND AT LEAST AN EQUAL PROPORTION OF LIQUID WHICH IS AT LEAST 25* C. HIGHER BOILING THAN THE END BOILING POINT OF THE MIXTURE OF ORGANIC SUBSTANCES AND WHICH IS OF THE SAME CHEMICAL CLASS AS THE ONE OF THE ORGANIC SUBSTANCES WHICH IS LESS READILY ADSORBED BY THE ADSORBENT, AND CONTINUOUSLY REMOVING AN OVERHEAD VAPOR
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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |