US2924569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodealkylation of hydrocarbons
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1956-08-01
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Granted: 1960-02-09
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Expires: 1976-08-01
Abstract
No abstract record available.
Inventors
- 👤 Armand M Souby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:41
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A METHOD FOR CONTROLLING AND SUPPRESSING THE FORMATION OF COKE IN A THERMAL DEALKYLATION ZONE IN WHICH AN ALKYLATED AROMATIC HYDROCARBON FEED IS HEATED IN SAID DEALKYLATION ZONE IN THE PRESENCE OF HYDROGEN TO A TEMPERATURE WITHIN THE RANGE BETWEEN ABOUT 1100* AND ABOUT 1600*F. AND AT A PRESSURE WITHIN THE RANGE BETWEEN ABOUT 400 AND ABOUT 1000 POUNDS PER SQUARE INCH GAUGE FOR A TIME WITHIN THE RANGE BETWEEN ABOUT 2 AND ABOUT 120 SECONDS IN THE PRESENCE OF A FLUIDIZED BED OF CATALYTICALLY INERT FINELY DIVED SOLIDS IN WHICH A LIQUID PRODUCT AND A RESIDUE GAS ARE PRODUCED WHICH COMPRISES THE STEPS OF ANALYZING SAID RESIDUE GAS TO OBTAIN A SIGNAL WHICH IS A FUNCTION OF THE METHANE TO HYDROGEN RATIO IN THE RESIDUE GAS, AND EMPLOYING AND SIGNAL TO VARY THE RATIO OF HYDROGEN AND ALKYLATED AROMATIC HYDROCARBON FEED IN SAID THERMAL REACTION ZONE TO PROVIDE A METHANE TO HYDROGEN RATIO IN SAID RESIDUE GAS SUCH THAT THE RATIO OF THE THERMODYNAMIC EQUILIBRIUM METHANE CONCENTRATION TO THE ACTUAL METHANE CONCENTRATION IS ABOVE ABOUT 1.7.
Claim 2
Independent Claim
177 words
A METHOD FOR CONTROLLING AND SUPPRESSING THE FORMATION OF COKE IN A THERMAL DEALKYLATION ZONE IN WHICH AN ALKYLATED AROMATIC HYDROCARBON FEED IS HEATED IN SAID DEALKYLATION ZONE IN THE PRESENCE OF HYDROGEN TO A TEMPERATURE WITHIN THE RANGE BETWEEN ABOUT 1100* AND ABOUT 1600*F. AND AT A PRESSURE WITHIN THE RANGE BETWEEN ABOUT 400 AND ABOUT 1000 POUNDS PER SQUARE INCH GAUGE FOR A TIME WITHIN THE RANGE BETWEEN ABOUT 2 AND ABOUT 120 SECONDS IN THE PRESENCE OF A FLUIDIZED BED OF CATALYTICALLY INERT FINELY DIVED SOLIDS IN WHICH A LIQUID PRODUCT AND A RESIDUE GAS ARE PRODUCED WHICH COMPRISES THE STEPS OF ANALYZING SAID RESIDUE GAS TO OBTAIN A SIGNAL WHICH IS A FUNCTION OF THE METHANE TO HYDROGEN RATIO IN THE RESIDUE GAS, AND EMPLOYING AND SIGNAL TO VARY THE RATIO OF HYDROGEN AND ALKYLATED AROMATIC HYDROCARBON FEED IN SAID THERMAL REACTION ZONE TO PROVIDE A METHANE TO HYDROGEN RATIO IN SAID RESIDUE GAS SUCH THAT THE RATIO OF THE THERMODYNAMIC EQUILIBRIUM METHANE CONCENTRATION TO THE ACTUAL METHANE CONCENTRATION IS ABOVE ABOUT 1.7.
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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |