US2592646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration and preconditioning of a methanethiol synthesis catalyst
Assignee: Pure Oil Co
•
Filing: 1948-10-07
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Granted: 1952-04-15
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Expires: 1968-10-07
Abstract
No abstract record available.
Inventors
- 👤 Richmond T Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:18
CPC Classifications
C; C07; C07C; C07C321/00; B; B01; B01J; B01J38/00; B01J38/04; B01J38/12; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10S; Y10S252/00; Y10S252/18; Y10S502/00; Y10S502/514
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD OF REGENERATING A CATALYST WHICH HAS ACCUMULATED A DEPOSIT OF CARBONACEOUS AND OTHER GENERALLY INHIBITORY SUBSTANCES BY LONG EXPOSURE TO REACTION CONDITIONS IN THE SYNTHESIS OF METHANETHIOL FROM METHYL ALCOHOL AND HYDROGEN SULFIDE WHICH COMPRISES, BURNING OFF FOREIGN MATERIALS FROM THE CATALYST IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE AT LEAST 25* C. BELOW THE SINTERING TEMPERATURE OF THE CATALYST, SUBJECTING THE CATALYST TO AN ATMOSPHERE OF METHYL ALCOHOL VAPOR, MAINTAINING THE CATALYST IN SAID ATMOSPHERE FOR A PERIOD OF 0.2 TO 2.0 HOURS AT A TEMPERATURE ABOUT 50* TO 150* C. BELOW OPPERATING TEMPERATURE FOR THE METHANETHIOL SYNTHESIS OPERATION, THEREBY TO REGENERATE THE CATALYST, ELIMINATE ITS INDUCTION PERIOD AND CONDITION ITS SURFACE FOR FURTHER USE.
Claim 2
Independent Claim
118 words
THE METHOD OF REGENERATING A CATALYST WHICH HAS ACCUMULATED A DEPOSIT OF CARBONACEOUS AND OTHER GENERALLY INHIBITORY SUBSTANCES BY LONG EXPOSURE TO REACTION CONDITIONS IN THE SYNTHESIS OF METHANETHIOL FROM METHYL ALCOHOL AND HYDROGEN SULFIDE WHICH COMPRISES, BURNING OFF FOREIGN MATERIALS FROM THE CATALYST IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE AT LEAST 25* C. BELOW THE SINTERING TEMPERATURE OF THE CATALYST, SUBJECTING THE CATALYST TO AN ATMOSPHERE OF METHYL ALCOHOL VAPOR, MAINTAINING THE CATALYST IN SAID ATMOSPHERE FOR A PERIOD OF 0.2 TO 2.0 HOURS AT A TEMPERATURE ABOUT 50* TO 150* C. BELOW OPPERATING TEMPERATURE FOR THE METHANETHIOL SYNTHESIS OPERATION, THEREBY TO REGENERATE THE CATALYST, ELIMINATE ITS INDUCTION PERIOD AND CONDITION ITS SURFACE FOR FURTHER USE.
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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) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |