【摘要】 利用三缺位Keggin型杂多酸[A-α-PW9O34]9-和{[FeШ(OH2)2]3(A-α-PW9O34)2}9-的四丁基铵盐为催化剂,H2O2为氧化剂,催化环己烯氧化反应.考察了反应时间、H2O2与环己烯的摩尔比和催化剂的用量等因素对反应的影响.结果表明,在1,2-二氯乙烷为10 mL、H2O2(质量分数30%)与环己烯的摩尔比为2、反应温度为35℃、反应时间为6 h和[(C4H9)4N]9[A-α-PW9O34]为催化剂的条件下,环己烯氧化反应的转化率为55%,主要产物是环氧环己烷,其选择性达99%以上;而以[(C4H9)4N]9{[FeШ(OH2)2]3(A-α-PW9O34)2}为催化剂时,环己烯氧化反应的转化率为17%,主要产物是2-环己烯-1-酮,选择性达99%以上.更多还原

【Abstract】 The oxidation of cyclohexene with 30%(mass fraction) hydrogen peroxide was catalyzed by trivacant Keggin-type polyoxometalates tetra-butylammonium salts [A-α-PW9O34]9-and {[FeШ(OH2)2]3·(A-α-PW9O34)2}9-.The effects of reaction conditions such as molar ratio of cyclohexene to H2O2,reaction time and catalyst amount on the catalyst activity were investigated.The catalyst [(C4H9)4N]9[A-α-PW9O34] shows a high selectivity(≥99%) for cyclohexene oxide with the cyclohexene conversion of 55%.The catalyst [(C4H9)4N]9{[FeШ(OH2)2]3(A-α-PW9O34)2} shows a cyclohexene conversion of 17% and a 2-cyclohexene-1-one selectivity of 99%.更多还原