Isomerization of 4,4'-methylenedi (cyclohexylamine) over moderated ruthenium catalyst
Abstract
Abstract A MIXTURE OF THE STEREISOMERS OF 4,4''-METHYLENE-DICYCLOHEXYLAMINE) NOT AT EQUILIBRIUM IS CONVERTED TO A MIXTURE OF STEROISOMERS APPROACHING EQUILIBRIUM RATIO BY HEATING THE MIXTURE OF STEREOISOMERS IN THE ABSENCE OF ADDED AMMONIA TO A TEMPERATURE OF FROM 150* TO 300* C. IN THE PRESENCE OF HYDROGEN AT A PARTIAL PRESSURE OF FROM 50 TO 5500 POUNDS PER SQUARE INCH AND AT A TOTAL PRESSURE OF FROM 500 TO 15,000 POUNDS PER SQUARE INCH IN THE PRESENCE OF FROM 0.001 TO 10 WEIGHT PERCENT OF A RUTHENIUM CATALYST, CALCULATED AS RUTHENIUM METAL AND BASED ON THE STARTING WEIGHT OF MIXED ISOMERS, THE RUTHENIUM BEING SUPPORTED ON AN INERT CARRIER AND HAVING BEEN ALKALI MODERATED WITH FROM 0.1 TO 15 WEIGHT PERCENT OF A BASIC ALKALI METAL COMPOUND CALCULATED AS THE ALKALI METAL.
Inventors
- 👤 L Brake
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |