合成一系列稀土杂多酸盐,考察了其在环己酮氧化合成己二酸反应中的活性.结果表明,K_8H_3[La(PW_(11)O_(39_)_2]·25H_2O在环己酮氧化合成己二酸的过程中显示了较高的催化活性,反应8h,己二酸的收率可达71.9%.考察了温度,时间,反应物加入量,过氧化氢加入量,催化剂加入量等一系列条件对反应的影响,确定了最佳反应条件.
In this work,a serialof heteropolyoxometallateswith rare earth were synthesized and used in the synthesis of adipic acid from cyclohexanone. Their catalyticactivity was evaluated and the result showed that K_8H_3[La(PW_(11)O_(39_)_2]·25H_2O isthe best of all catalystsbecause of its high catalyticactivity. It was also found that when the reaction time was 8h,a high yield of 71.9% of adipic acid can be obtained. Besides,the optimum reaction conditions were determined by examining the effect of reaction conditions such as reaction temperature,time,amount of cyclohexanone and H_2O_2,and catalyst dosage.
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