US3310593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the quality of dealkylated aromatic compounds
Assignee: Gulf Research and Development Co
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Filing: 1965-06-23
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Granted: 1967-03-21
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Expires: 1985-06-23
Abstract
No abstract record available.
Inventors
- 👤 Elwood E Nelson
- 👤 Rodney E Peterson
- 👤 Eldon M Sutphin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:15
CPC Classifications
C; C07; C07C; C07C15/00; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/16; C07C4/18; C07C7/00; C07C7/148; C07C7/163; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/38; C07C2523/40; C07C2523/70; C07C2523/74; C10; C10G; C10G2400/00; C10G2400/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS FOR THE PRODUCTION OF HYPERPURE DEALKYLATED AROMATIC COMPOUNDS WHICH COMPRISES HEATING A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF AN ALKYL AROMATIC COMPOUND AND A MIXTURE OF ALKYL AROMATIC COMPOUNDS AND ABOUT A 1.5 TO 20 MOLAR EXCESS OF HYDROGEN TO A TEMPERATURE AND PRESSURE BETWEEN ABOUT 1000* TO 1800*F. AND 100 TO 1000 P.S.I.G. FOR ABOUT ONE TO 600 SECONDS; SUBJECTING THE EFFLUENT MIXTURE WHICH IS SUBSTANTIALLY FREE OF ORGANIC SULFUR COMPOUNDS TO A TEMPERATURE AND PRESSURE BETWEEN ABOUT 150* TO 600*F. AND 100 TO 1000 P.S.I.G. IN THE PRESENCE OF A SOLID PARTICULATE MATERIAL SELECTED FROM THE GROUP CONSITING OF METALS, METAL OXIDES AND SULFIDED METALS OF GROUP VI (LEFT COLUMN) AND VIII OF THE PERIODIC TABLE, AND MIXTURE THEREOF, DISTENDED ON A NON-ACIDIC SUPORT; AND SEPARATING THE TREATING EFFLUENT MIXTURE INTO FRACTIONS OF HYPERPURE DEALKYLATED AROMATIC COMPOUNDS.
Claim 2
Dependent Claim
142 words
A PROCESS FOR THE PRODUCTION OF HYPERPURE DEALKYLATED AROMATIC COMPOUNDS WHICH COMPRISES HEATING A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF AN ALKYL AROMATIC COMPOUND AND A MIXTURE OF ALKYL AROMATIC COMPOUNDS AND ABOUT A 1.5 TO 20 MOLAR EXCESS OF HYDROGEN TO A TEMPERATURE AND PRESSURE BETWEEN ABOUT 1000* TO 1800*F. AND 100 TO 1000 P.S.I.G. FOR ABOUT ONE TO 600 SECONDS; SUBJECTING THE EFFLUENT MIXTURE WHICH IS SUBSTANTIALLY FREE OF ORGANIC SULFUR COMPOUNDS TO A TEMPERATURE AND PRESSURE BETWEEN ABOUT 150* TO 600*F. AND 100 TO 1000 P.S.I.G. IN THE PRESENCE OF A SOLID PARTICULATE MATERIAL SELECTED FROM THE GROUP CONSITING OF METALS, METAL OXIDES AND SULFIDED METALS OF GROUP VI (LEFT COLUMN) AND VIII OF THE PERIODIC TABLE, AND MIXTURE THEREOF, DISTENDED ON A NON-ACIDIC SUPORT; AND SEPARATING THE TREATING EFFLUENT MIXTURE INTO FRACTIONS OF HYPERPURE DEALKYLATED AROMATIC COMPOUNDS.
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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |