US3284527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dealkylation of alkyl-substituted aromatics
Assignee: Monsanto Co
•
Filing: 1963-12-31
•
Granted: 1966-11-08
•
Expires: 1983-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jack M Gill
- 👤 William G Juhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:50
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/20; C07C4/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR THE DEALKYLATION OF ALKYL SUBSTITUTED AROMATIC HUDRCARBONS WHICH COMPRISES PASSING AN ALKYL SUBSTITUTED AROMATIC HYDROCARBON SELECTED FROM THE TIALLY OF ALKYL AROMATIC HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF ALKYL ANTHRACENES, ALKYL PYRENES, ALKYL PHENANTHRENES, ALKYL ANTHRACENES, ALKYLS PYRENES, ALKYL CHRYSENES, AND MIXTURES THEREOF, THROUGH A DEALKYLATION ZONE WHICH IS MAINTAINED AT A TEMPERATURE OF 750 TO 1000* F. AND A PRESSURE OF 400 TO 2500 P.S.I.G., SAID ALKYL SUBSTITUTED AROMATIC HYDROCARBONS BEING PASSED INTO THE DEALKYLATION ZONE CONCURRENTLY WITH A HYDROGEN DONOR, SAID HYDROGEN DONOR BEING A PARTIALLY-HYDROGENEATED AROMATIC HYDROCARBON, AND RECOVERING FROM SAID DEALKYLATON ZONE AROMATIC HYDROCARBONS OF REDUCED MOLECULAR WEIGHT.
Claim 2
Dependent Claim
106 words
A PROCESS FOR THE DEALKYLATION OF ALKYL SUBSTITUTED AROMATIC HUDRCARBONS WHICH COMPRISES PASSING AN ALKYL SUBSTITUTED AROMATIC HYDROCARBON SELECTED FROM THE TIALLY OF ALKYL AROMATIC HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF ALKYL ANTHRACENES, ALKYL PYRENES, ALKYL PHENANTHRENES, ALKYL ANTHRACENES, ALKYLS PYRENES, ALKYL CHRYSENES, AND MIXTURES THEREOF, THROUGH A DEALKYLATION ZONE WHICH IS MAINTAINED AT A TEMPERATURE OF 750 TO 1000* F. AND A PRESSURE OF 400 TO 2500 P.S.I.G., SAID ALKYL SUBSTITUTED AROMATIC HYDROCARBONS BEING PASSED INTO THE DEALKYLATION ZONE CONCURRENTLY WITH A HYDROGEN DONOR, SAID HYDROGEN DONOR BEING A PARTIALLY-HYDROGENEATED AROMATIC HYDROCARBON, AND RECOVERING FROM SAID DEALKYLATON ZONE AROMATIC HYDROCARBONS OF REDUCED MOLECULAR WEIGHT.
References Cited (Backward Citations)
US3177262A
Cited
US3147206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |