US3265755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorption process
Assignee: Shell USA Inc
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Filing: 1962-03-19
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Granted: 1966-08-09
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Harry D Evans
- 👤 Richard J Schoofs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:54
CPC Classifications
C; C10; C10G; C10G25/00; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A CONTINUOUS CYCLIC ADSORPTION PROCESS COMPRISING ADSORPTION IN A PLURALITY OF SEQUENTIALLY OPERATING ZONES EACH PROVIDED WITH AN ADSORBENT SELECTIVE FOR AROMATIC AND WHEREIN EACH ZONE, STEPWISE AND IN TURN, PASSES THROUGH THE FOLLOWING STEPS: (A) A PARAFFIN FEED STEAM CONTAINING AROMATICS IS INTRODUCED INTO THE ZONE AND A PARAFFIN STEAM ESSENTIALLY FREE FROM AROMATICS IS RECOVERED THERE FROM, (B) A TEAM COMPRISING ISOMERIZATE AND AROMATICS IS INTRODUCED IN AN AMOUNT SUFFICIENT TO HEAT AT LEAST A PORTION OF THE ZONE AND A FURTHER AMOUNT OF PARAFFIN ESSENTIALLY FREE FROM AROMATICS IS RECOVERED THEREFROM, (C) A HOT ISOMERIZATE STEAM IS INTRODUCED INTO THE AT LEAST PARTIALLY HEATED ZONE IN AN AMOUNT SUFFICIENT TO ELUTE THE SELECTIVELY ADSORBED AROMATICS AND A MIXTURE COMPRISING ISOMERIZATE AND AROMATICS IS RECOVERED FROM THE ZONE AS THE PRODUCT OF THE PROCESS, AND (D) A PORTION OF THE COLD PARAFFIN STEAM ESSENTIALLY FREE FRON AROMATICS RECOVERED FROM STEP A IS PASSED THROUGH THE ZONE IN AN AMOUNT SUFFICIENT TO COOL AT LEAST A PORTION OF THE ZONE AND A STEAM COMPRISING ISOMERIZATE AND AROMATICS IS RECOVERED FROM THE AT LEAST PARTIALLY COOLED ZONE, AND INTRODUCED AS THE HEATING MATERIAL FOR STEP B.
Claim 2
Dependent Claim
196 words
A CONTINUOUS CYCLIC ADSORPTION PROCESS COMPRISING ADSORPTION IN A PLURALITY OF SEQUENTIALLY OPERATING ZONES EACH PROVIDED WITH AN ADSORBENT SELECTIVE FOR AROMATIC AND WHEREIN EACH ZONE, STEPWISE AND IN TURN, PASSES THROUGH THE FOLLOWING STEPS: (A) A PARAFFIN FEED STEAM CONTAINING AROMATICS IS INTRODUCED INTO THE ZONE AND A PARAFFIN STEAM ESSENTIALLY FREE FROM AROMATICS IS RECOVERED THERE FROM, (B) A TEAM COMPRISING ISOMERIZATE AND AROMATICS IS INTRODUCED IN AN AMOUNT SUFFICIENT TO HEAT AT LEAST A PORTION OF THE ZONE AND A FURTHER AMOUNT OF PARAFFIN ESSENTIALLY FREE FROM AROMATICS IS RECOVERED THEREFROM, (C) A HOT ISOMERIZATE STEAM IS INTRODUCED INTO THE AT LEAST PARTIALLY HEATED ZONE IN AN AMOUNT SUFFICIENT TO ELUTE THE SELECTIVELY ADSORBED AROMATICS AND A MIXTURE COMPRISING ISOMERIZATE AND AROMATICS IS RECOVERED FROM THE ZONE AS THE PRODUCT OF THE PROCESS, AND (D) A PORTION OF THE COLD PARAFFIN STEAM ESSENTIALLY FREE FRON AROMATICS RECOVERED FROM STEP A IS PASSED THROUGH THE ZONE IN AN AMOUNT SUFFICIENT TO COOL AT LEAST A PORTION OF THE ZONE AND A STEAM COMPRISING ISOMERIZATE AND AROMATICS IS RECOVERED FROM THE AT LEAST PARTIALLY COOLED ZONE, AND INTRODUCED AS THE HEATING MATERIAL FOR STEP B.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |