Catalytic oxidation of cyclohexane to KA oil by zinc oxide supported manganese 5,10,15,20-tetrakis(4-nitrophenyl)porphyrin

• Manganese 5,10,15,20-tetrakis(4-nitrophonyl) porphyrin shows better activity in cyclohexane oxidation.
• ZnO supported manganese 5,10,15,20-tetrakis(4-nitrophonyl) porphyrin gives better catalytic performance.
• Mn-TNPP/ZnO is easy to recover and keeps at the same activity in recycling.

A series of manganese metalloporphyrins were prepared and tested in cyclohexane oxidation. It has been found that the manganese 5,10,15,20-tetrakis(4-nitrophonyl) porphyrin (Mn-TNPP) presents better catalytic performance. The Mn-TNPP was then immobilized on different supports, and characterized by UV–vis, FT-IR, XRD, TG/DTG and ICP. Among these supported Mn-TNPP catalysts, Mn-TNPP/ZnO exhibits the best selectivity to KA oil and higher turnover number in cyclohexane oxidation. The influence of the reaction conditions and the recycle of the catalysts are discussed. Mn-TNPP/ZnO catalyst presents the average cyclohexane conversion of 7.17%, KA oil selectivity of 91.18%, and the average catalytic turnover number of 6.53 × 104 after six times of recycle under 150 °C and 1.0 MPa.

Zinc oxide supported manganese 5,10,15,20-tetrakis(4-nitrophonyl) porphyrin (Mn-TNPP) presents better catalytic performance in cyclohexane oxidation, it gives the average selectivity to KA oil of 91.18% at the cyclohexane conversion of 7.17%, and the turnover number reaches to 6.53 × 104 after six times of recycle.Figure optionsDownload high-quality image (124 K)Download as PowerPoint slide