Patent US4287477A successfully refreshed from Google Patents.
Patent US3213152A successfully refreshed from Google Patents.
US3213152A
Expired / Lapsed
US
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Process for producing an aromatic concentrate from a mixed hydrocarbon stock
Assignee: Ashland LLC
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Filing: 1963-04-15
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Granted: 1965-10-19
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Expires: 1983-04-15
Abstract
No abstract record available.
Inventors
- 👤 William H Gammon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:15
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C07; C07C; C07C15/00; C07C15/02; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C10G2300/00; C10G2300/10; C10G2300/1096; C10G2400/00; C10G2400/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A PROCESS FOR PRODUCING AN AROMATIC CONCENTRATE CONTAINING A LARGE PROPORTION OF BICYCLIC AROMATICS AND LESS THAN 5% OF PARAFFINS, WHICH COMPRISES FRACTIONATING A MIXED HYDROCARBON STOCK CONTAINING PARAFFINS AND BICYCLIC NAPHTHENES TO PRODUCE A FRACTION HAAVING AN END BOILING POINT BETWEEN ABOUT 400 AND 450*F. AND A 95% POINT NO HIGHER THAN ABOUT 425*F. SO THAT A SUBSTANTIAL PORTION OF THE BICYCLIC AROMATIC COMPOUNDS OBTAINABLE UPON A DEHYDROGENATION OF THE BICYCLIC NAPHTHENES IN SAID FRACTION BOILS HIGHER THAN ALL BUT A SMALL PORTION OF THE PARAFFINS PRESENT IN SAID STOCK, DEHYDROGENATING SAID FRACTION OVER A DEHYDROGENATION CATALYST TO CONVERT AT LEAST A PORTION OF THE BICYCLIC NAPHTHENES THEREIN TO THE CORRESPONDING AROMATICS, AND FRACTIONATING THE DEHYDROGENATED FRACTION TO PRODUCE A SUBSTANTIALLY AROMATIC CONCENTRATE HAVING AN INITIAL BOILING POINT ABOVE ABOUT 400*F. AND A PARAFFIN CONTENT LESS THAN 5% AND A LOWER BOILING PARAFFIN-CONTAINING FRACTION.
Claim 2
Dependent Claim
145 words
A PROCESS FOR PRODUCING AN AROMATIC CONCENTRATE CONTAINING A LARGE PROPORTION OF BICYCLIC AROMATICS AND LESS THAN 5% OF PARAFFINS, WHICH COMPRISES FRACTIONATING A MIXED HYDROCARBON STOCK CONTAINING PARAFFINS AND BICYCLIC NAPHTHENES TO PRODUCE A FRACTION HAAVING AN END BOILING POINT BETWEEN ABOUT 400 AND 450*F. AND A 95% POINT NO HIGHER THAN ABOUT 425*F. SO THAT A SUBSTANTIAL PORTION OF THE BICYCLIC AROMATIC COMPOUNDS OBTAINABLE UPON A DEHYDROGENATION OF THE BICYCLIC NAPHTHENES IN SAID FRACTION BOILS HIGHER THAN ALL BUT A SMALL PORTION OF THE PARAFFINS PRESENT IN SAID STOCK, DEHYDROGENATING SAID FRACTION OVER A DEHYDROGENATION CATALYST TO CONVERT AT LEAST A PORTION OF THE BICYCLIC NAPHTHENES THEREIN TO THE CORRESPONDING AROMATICS, AND FRACTIONATING THE DEHYDROGENATED FRACTION TO PRODUCE A SUBSTANTIALLY AROMATIC CONCENTRATE HAVING AN INITIAL BOILING POINT ABOVE ABOUT 400*F. AND A PARAFFIN CONTENT LESS THAN 5% AND A LOWER BOILING PARAFFIN-CONTAINING FRACTION.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |