US3256357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control in hydrodealkylation process
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1964-04-17
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Granted: 1966-06-14
•
Expires: 1984-04-17
Abstract
No abstract record available.
Inventors
- 👤 George P Baumann
- 👤 Preiser Aaron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:28
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
THE PROCESS FOR THE THERMAL NON-CATALYTIC HYDRODEALKYLATION OF ALKYL SUBSTITUTED AROMATIC HYDROCARBONS WHICH COMPRISES HEATING THESE HYDROCARBONS WITH 1 TO 6 MOLS OF HYDROGEN PER MOL OF HYDROCARBONS TO A TEMPERATURE IN THE RANGE OF 1050 TO 1300*F., SUPPLYING THE REACTANTS TO A REACTOR HAVING AN L/D RATION OF 10:1 TO 200:1 AND WHICH IS FREE OF EXTRANEOUS SOLIDS, CONTROLLING THE TEMPERATURE IN THE REACTION SO THAT IT DOES NOT EXCEED ABOUT 1400*F. BY ADDING A COOL HYDROGEN-CONTAINING GAS CONTAINING MORE THAN 60 MOL PERCENT HYDROGEN AT SEVERAL POINTS SPACED DOWNSTREAM FROM THE ENTRANCE TO THE REACTOR AND FINALLY QUENCHING THE REACTANTS TO A TEMPERATURE BELOW 1200*F.
Claim 2
Dependent Claim
107 words
THE PROCESS FOR THE THERMAL NON-CATALYTIC HYDRODEALKYLATION OF ALKYL SUBSTITUTED AROMATIC HYDROCARBONS WHICH COMPRISES HEATING THESE HYDROCARBONS WITH 1 TO 6 MOLS OF HYDROGEN PER MOL OF HYDROCARBONS TO A TEMPERATURE IN THE RANGE OF 1050 TO 1300*F., SUPPLYING THE REACTANTS TO A REACTOR HAVING AN L/D RATION OF 10:1 TO 200:1 AND WHICH IS FREE OF EXTRANEOUS SOLIDS, CONTROLLING THE TEMPERATURE IN THE REACTION SO THAT IT DOES NOT EXCEED ABOUT 1400*F. BY ADDING A COOL HYDROGEN-CONTAINING GAS CONTAINING MORE THAN 60 MOL PERCENT HYDROGEN AT SEVERAL POINTS SPACED DOWNSTREAM FROM THE ENTRANCE TO THE REACTOR AND FINALLY QUENCHING THE REACTANTS TO A TEMPERATURE BELOW 1200*F.
Claim 3
Dependent Claim
66 words
THE PROCESS AS DEFINED IN CLAIM 1 IN WHICH THE TEMPERATURE OF THE REACTION MIXTURE IS MEASURE IN CLOSE PROXIMITY TO THE REACTOR INLET AND HYDROGEN CONTAINING GAS IS ADDED DOWNSTREAM OF THE POINT AT WHICH THE TEMPERATURE IS MEASURED, THE AMOUNT OF HYDROGEN-CONTAINING GAS ADDED VARYING IN RESPONSE TO THE TEMPERATURE MEASUREMENT TO MAINTAIN THE TEMPERATURE OF THE REACTION MIXTURE BELOW A RUNAWAY TEMPERATURE LEVEL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |