铈磷钼钒杂多酸盐催化过氧化氢氧化环己烷

Ceriummolybdovanadophosphoric Heteropoly Acid Salt Catalytic Oxidation of Cyclohexane with Hydrogen Peroxide

摘要:

用稀土元素铈取代磷钼钒杂多酸合成了Keggin型稀土铈磷钼钒四元杂多酸盐（CeHPMo11VO40•nH2O），采用X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）等方法对该杂多酸盐的结构进行了表征。将其作为催化剂应用于H2O2氧化环己烷制备环己醇和环己酮的反应中。考察了反应条件（催化剂用量、反应温度、反应时间、H2O2用量）对反应的影响。实验结果表明，反应最佳条件为：以0.1mol环己烷为基准，当CeHPMo11VO40•nH2O用量为0.2mmol、反应温度为75℃、反应时间为9h、30%过氧化氢0.2mol环己烷的转化率达到41.29%，环己醇和环己烷的总收率可达27.49%。

Abstract:

Keggin-type rare earth ceriummolybdovanadophosphoric of four yuan heteropoly acid salt (CeHPMo11VO40?nH2O)has been synthesized and characterized by FT-IR, X-ray diffraction. CeHPMo11VO40?nH2O showed highest catalytic activity in the yield of cyclohexanol and cyclohexane when cyclohexane as raw materials, H2O2 as oxidant, the optimum reaction conditions are investigated that (amount of catalyst, reaction temperature, reaction time, H2O2 dosage) 0.1mol cyclohexane as a reference, the amount of CeHPMo11VO40?nH2O is 0.2mmol , added 30% hydrogen peroxide 0.2mol ,the reaction temperature is 75 ℃, though reacting 9h, the conversion of cyclohexane was 41.29%, the total yield of cyclohexanol and cyclohexane up to 27.49%.