Catalyst | χ (%)a | Si (%)c | [V, Co and/or Mn] (ppb)d | χ (%)b |
|---|
Ol | One | Others | V | Co | Mn |
|---|
AlPO4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
VAlPO4 | 5.9 | 69.2 | 28.6 | 1.8 | 11 | – | – | 0.04 |
VAPO-5 | 6.3 | 60.5 | 35.0 | 1.0 | 390 | – | – | 0.8 |
V2O5 | 2.1 | 51.3 | 44.6 | 4.1 | 610 | – | – | 1.1 |
VAlPO
e4
| 5.7 | 68.7 | 28.9 | 2.4 | 15 | – | – | 0.09 |
CoAPO4 [22] | 3.8 | 91.3 | 7.4 | 1.3 | – | 24 | – | 0.03 |
MnAPO4 [22] | 4.1 | 93.6 | 5.6 | 0.8 | – | – | 0 | 0.01 |
CoMnAPO4 [22] | 5.2 | 60.7 | 33.7 | 0.5 | – | 15 | 8 | 0.04 |
- Cyclohexane 100 mL, VAlPO4 berlinite catalyst 5 mg, acetic acid solvent 40 mL, O2 pressure 0.1 MPa, 348 K, 4 h
- a,b χ: Cyclohexane conversion in normal and leaching test, respectively; c Si: Ol, cyclohexanol; One, cyclohexanone; Others, C4–C6 diacids and their esters; d Concentrations of metal ion leaked into solution; e VAlPO4 berlinite catalyst recycled for the fifth time as a catalyst in the reaction batch
