Patent US3558732A successfully refreshed from Google Patents.
US3558732A
Expired / Lapsed
US
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Aromatic hydrocarbon separation by adsorption
Assignee: Universal Oil Products Co
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Filing: 1969-05-12
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Granted: 1971-01-26
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Expires: 1989-05-12
Abstract
Abstract AN IMPROVED ADSORPTIVE-SEPARASTION PROCESS FOR SEPARATING AT LEAST ONE C8 AROMATIC ISOMER FROM A HYDROCARBON FEED CONTAINING A MIXTURE OF C8 AROMATIC ISOMERS WHICH PROCESS EMPLOYS A CRYSTALINNE ALUMINOSILICATE ADSORBENT TO SELECTIVELY ADSORB ONE C8 AROMATIC ISOMER FROM THE FEED. THE IMPROVEMENT BASICALLY COMPRISES EMPLOYING TOLUENE AS A DESORBENT TO INCREASE THE SELECTIVELY OF THE CRYSTALLINE ALUMINOSILICATE THEREBY ALLOWING A MORE EFFICIENT SEPARATION WITH HIGHER PURITY EXTRACT STREAMS.
Inventors
- 👤 Richard W Neuzil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:59
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |