Journal
MOLECULAR CATALYSIS
Volume 466, Issue -, Pages 130-137Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2019.01.019
Keywords
Cyclohexane; KA-oil; Hydrotalcite-derived mixed metal oxides; Solvent-free; Selective oxidation
Categories
Funding
- National Natural Science Foundation of China [21676226, 21606186]
- Natural Science Foundation for Distinguished Young Scholars in Hunan Province [2018JJ1023]
- Natural Science Foundation in Hunan Province [2018JJ3144]
- Scientific Research Fund of Hunan Provincial Education Department [17K088, 16C1539]
- Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization
- Engineering Research Centre of Chemical Process Simulation and Optimization of Ministry of Education
- Hunan Key Laboratory of Environment-Friendly Chemical Process Integrated Technology
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Developing a highly efficient and stable catalyst for the selective aerobic oxidation of saturated hydrocarbons to functional compounds is highly desirable in chemical industry. In our present work, hydrotalcite-derived CoMgAlO mixed metal oxides as efficient and stable heterogeneous catalyst for the selective aerobic oxidation of cyclohexane to KA-oil has been developed. The results indicate that hydrotalcite-derived Co-MgAlO mixed metal oxides catalysts are active and selective; the synergistic catalysis of Co3+ and Co2+ can effectively promote the decomposition of cyclohexyl hydroperoxide (CHHP) intermediate to KA-oil. 9.1% of cyclohexane conversion and 82.0% of KA-oil selectivity over 2%Co-MgAIO catalyst with high turnover numbers (3800) was obtained at 423 K and 0.6 MPa for 2 h in this oxidation reaction. Moreover, the hydrotalcite-derived Co-MgAlO catalyst is easy to be separated and recycled, and its catalytic performance was still stable after five runs. The schematic reaction pathway for the oxidation of cyclohexane to KA-oil over Co-MgAlO mixed metal oxides catalyst was also suggested. Maybe this work employing inexpensive hydrotalcite-derived Co-MgAlO as highly efficient and environmentally friendly catalyst for the preparation of KA-oil has potential industrial application prospects.
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