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采用微波晶化法合成了二元CuAl、三元CuAlNi、四元CuAlNiFe、五元CuAlNiFeCo水滑石类化合物 ,并将其用于催化苯酚羟基化制苯二酚 ,结果表明五元配合物的催化性能最好。Cu4NiCoFeAlCO3的XRD和IR表征表明其晶体结构为水滑石结构 ;用TEM观察了五元配合物的晶体形貌。五元水滑石催化苯酚羟基化反应结果表明 ,催化剂活性随其铜含量的增加而增大 ;双氧水的有效利用率随苯酚 双氧水摩尔比的升高而增大。以Cu4NiCoFeAlCO3 为催化剂时 ,在苯酚 催化剂质量比为 1 0、1 0mL水作溶剂、0 5g苯酚、苯酚 双氧水摩尔比为 1∶2条件下 ,苯酚转化率为 62 96% ,苯二酚的选择性达到 97 63 %。
The binary CuAl, ternary CuAlNi, quaternary CuAlNiFe and quinary CuAlNiFeCo hydrotalcites have been synthesized by microwave crystallization and used to catalyze the hydroxylation of phenol to phenol. The catalytic performance of the five-member complexes the best. The XRD and IR characterization of Cu4NiCoFeAlCO3 showed that the crystal structure of the Cu4NiCoFeAlCO3 was hydrotalcite. The crystal morphology of the five-member complex was observed by TEM. The results showed that the catalyst activity increased with the increase of copper content. The effective utilization rate of hydrogen peroxide increased with the molar ratio of phenol and hydrogen peroxide. When Cu4NiCoFeAlCO3 was used as catalyst, the conversion of phenol was 62 96% under the conditions of molar ratio of phenol to catalyst of 10, 10 mL of water and molar ratio of 0 5 g phenol to phenol hydrogen peroxide of 1: 2. The selectivity of hydroquinone Reached 97 63%.