Influence of Compressed Carbon Dioxide on the Oxidation of Cyclohexane with Hydrogen Peroxide in Acetic Acid
Liang Gao A , Tao Jiang A B , Buxing Han A , Baoning Zong B C , Xiaoxin Zhang C and Jicheng Zhang AA Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
B Research Institute of Petroleum Processing, Sinopec, Beijing 100083, China.
C Corresponding authors. Email: jiangt@iccas.ac.cn; zongbn@ripp-sinopec.com
Australian Journal of Chemistry 59(3) 225-228 https://doi.org/10.1071/CH05331
Submitted: 7 December 2005 Accepted: 24 February 2005 Published: 24 March 2006
Abstract
The oxidation of cyclohexane with H2O2 in a compressed CO2/acetic acid binary system was studied at 60.0 and 80.0°C, at pressures up to 18 MPa, and with the zeolite TS-1 as catalyst. The phase behaviour of the reaction system was also observed. There are three fluid phases in the reaction system at lower pressure but two at higher pressures. In the three-phase region the yields of the products, cyclohexanol and cyclohexanone, increase considerably with increasing pressure and reaches a maximum near the phase-separating pressure. CO2 can thus enhance the reaction effectively. However, the effect of pressure on the yield is very limited after the transition to a two-phase system.
Acknowledgment
This work was financially supported by National Natural Science Foundation of China (20473105, 20332030).
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