铜掺杂钙铝水滑石催化氧化异丙苯制备异丙苯过氧化氢.

Cu-doped calcium aluminum hydrotalcites of Ca4CuxAl-LDHs（x=0，0. 1，0. 3，0. 5，0. 8，1. 0） were prepared by a coprecipitation method，and its catalytic activity for liquid phase oxidation of cumene to cumene hydroperoxide（CHP） was investigated. Ca4CuxAl-LDHs were characterized by X-ray diffraction， Fourier transform infrared spectroscopy，scanning electron microscope and thermal analysis. The prepared Ca4CuxAl-LDHs remain the layered structure of hydrotalcite. The copper doping results in a smaller pore size and a larger specific surface area. When the feed ratio（catalyst/cumene） is 7. 5 mg/mL，the reaction temperature is 85 ℃，the flow rate of oxygen is 15 mL/min，and the reaction time is 7 h，Ca4Cu0. 5Al-LDHs shows excellent catalytic activity，the conversion of cumene is 34. 5% and the selectivity of CHP is 86. 9%. After being used for five cycles，the conversion of cumene is 31. 2% and the selectivity of CHP is 83. 3%. The study is useful for developing the production method for cumene hydrogen peroxide. [ABSTRACT FROM AUTHOR]