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US3032592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sulfur compounds
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-06-03
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Granted: 1962-05-01
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Expires: 1979-06-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Frantz
- 👤 King I Glass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:44
CPC Classifications
C; C07; C07C; C07C321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A CONTINUOUS PROCES FOR THE PROCUCTION OF DODECYL MERCAPTAN WHICH COMPRISES PASSING A LIQUID PROPYLENE TETRAMER DOWNWARDLY THROUGH A REACTION COLUMN, CONTINUOUSLY INTRODUCING A MIXTURE OF BF3, H2S AND WATER VAPORINTO A VAPOR SPACE IN THE LOWER PORTION OF SAID REACTION COLUMN, PASSING SAID MIXTURE UPWARDLY THROUGH SAID COLUMN COUNTER-CURRENTLY CONTACTING THE DESCENDING PROPYLENE TETRAMER WHILE MAINTAINING THE REACTION TEMPERATURE IN A RANGE FROM ABOUT 20*C. TO ABOUT 100*C. AND REMOVING DOCECYL MERCAPTAN FROM THE LOWER PORTION OF SAID REACTOR COLUMN BY FRACTIONAL DISTILLATION AT A TEMPERATURE BELOW 210*C., THE BF3 BEING EMPLOYED IN THE MOLAR RATIO OF H2S:BF3 OF FROM ABOUT 10:1 TO ABOUT 100:1 AND THE H2O BEING EMPLOYED IN THE MOLAR RATIO OF H2O:BF3 OF FROM ABOUT 0.5:1 TO ABOUT 2:1.
Claim 2
Dependent Claim
124 words
A CONTINUOUS PROCES FOR THE PROCUCTION OF DODECYL MERCAPTAN WHICH COMPRISES PASSING A LIQUID PROPYLENE TETRAMER DOWNWARDLY THROUGH A REACTION COLUMN, CONTINUOUSLY INTRODUCING A MIXTURE OF BF3, H2S AND WATER VAPORINTO A VAPOR SPACE IN THE LOWER PORTION OF SAID REACTION COLUMN, PASSING SAID MIXTURE UPWARDLY THROUGH SAID COLUMN COUNTER-CURRENTLY CONTACTING THE DESCENDING PROPYLENE TETRAMER WHILE MAINTAINING THE REACTION TEMPERATURE IN A RANGE FROM ABOUT 20*C. TO ABOUT 100*C. AND REMOVING DOCECYL MERCAPTAN FROM THE LOWER PORTION OF SAID REACTOR COLUMN BY FRACTIONAL DISTILLATION AT A TEMPERATURE BELOW 210*C., THE BF3 BEING EMPLOYED IN THE MOLAR RATIO OF H2S:BF3 OF FROM ABOUT 10:1 TO ABOUT 100:1 AND THE H2O BEING EMPLOYED IN THE MOLAR RATIO OF H2O:BF3 OF FROM ABOUT 0.5:1 TO ABOUT 2:1.
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) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |