Hydroformylation of cyclohexene over catalysts under different reaction time.
| Entry | Catalyst | Conversion of cyclohexene (%) | Selectivity (%) | |
|---|---|---|---|---|
| Aldehyde | Alcohols | |||
| 1 | Rh/TNTs (1 h) | 6 | 94 | 6 |
| 2 | Rh/TNTs (2 h) | 99 | 93 | 7 |
| 3 | Rh–Ru/TNTs (1 h) | 0 | 0 | 0 |
| 4 | Rh–Ru/TNTs (2 h) | 1 | 0 | 0 |
| 5 | Rh–Ru/TNTs (8 h) | 100 | 100 | 0 |
| 6 | Ru/TNTs (8 h)a,b | 0 | 0 | 0 |
| 7 | Ru–Rh/TNTs (8 h) | 0 | 0 | 0 |
| 8 | Ru–Rh/TNTs (8 h)b | 100 | 94 | 6 |
a
Reaction conditions: cyclohexene = 5 mL, solvent (toluene) = 65 mL, catalyst = 0.40 g, syngas pressure 6 MPa (CO/H2 = 1), T = 100 °C.
b
T = 120 °C.