US3291850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodealkylation of alkyl aromatic hydrocarbons
Assignee: Universal Oil Products Co
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Filing: 1965-09-20
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Granted: 1966-12-13
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Don B Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:52
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/18; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26; C07C2523/70; C07C2523/74; C07C2523/755; C10; C10G; C10G2400/00; C10G2400/30; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/905; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A HYDRODEALKYLATION PROCESS WHICH COMPRISES REACTING AN ALKYL AROMATIC HYDROCARBON WITH HYDROGEN AT HYDRODEALKYLATION CONDITIONS, THEREBY FORMING A REACTION MIXTURE CONTAINING DEALKYLATED AROMATIC HYDROCARBONS, HYDROGEN AND METHANE, COMMINGLING STEAM WITH SAID MIXTURE AND CATALYTICALLY REACTING THE SAME WITH AT LEAST A PORTION OF THE METHANE CONTENT OF THE MIXTURE TO CONVERT METHANE TO HYDROGEN AND CARBON OXIDES, SEPARATING THE RESULTANT HYDROGEN-ENRICHED REACTION MIXTURE INTO A GASEOUS PHASES AND A LIQUID HYDROCARBON PHASE, SEPARATING CARBON OXIDES FROM SAID GASEOUS PHASE TO INCREASE THE HYDROGEN CONCENTRATION OF THE LATTER, THEREAFTER SUPPLYING THE GASEOUS PHASE TO THE AFORESAID HYDROALKYLATION STEP TO FURNISH HYDROGEN THEREFOR, AND RECOVERING THE DESIRED DEALKYLATED AROMATIC HYDROCARBON FROM SAID LIQUID PHASE.
Claim 2
Dependent Claim
112 words
A HYDRODEALKYLATION PROCESS WHICH COMPRISES REACTING AN ALKYL AROMATIC HYDROCARBON WITH HYDROGEN AT HYDRODEALKYLATION CONDITIONS, THEREBY FORMING A REACTION MIXTURE CONTAINING DEALKYLATED AROMATIC HYDROCARBONS, HYDROGEN AND METHANE, COMMINGLING STEAM WITH SAID MIXTURE AND CATALYTICALLY REACTING THE SAME WITH AT LEAST A PORTION OF THE METHANE CONTENT OF THE MIXTURE TO CONVERT METHANE TO HYDROGEN AND CARBON OXIDES, SEPARATING THE RESULTANT HYDROGEN-ENRICHED REACTION MIXTURE INTO A GASEOUS PHASES AND A LIQUID HYDROCARBON PHASE, SEPARATING CARBON OXIDES FROM SAID GASEOUS PHASE TO INCREASE THE HYDROGEN CONCENTRATION OF THE LATTER, THEREAFTER SUPPLYING THE GASEOUS PHASE TO THE AFORESAID HYDROALKYLATION STEP TO FURNISH HYDROGEN THEREFOR, AND RECOVERING THE DESIRED DEALKYLATED AROMATIC HYDROCARBON FROM SAID LIQUID PHASE.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |