【摘要】 在无溶剂、无相转移催化剂条件下,用钨酸钠或磷钨酸为催化剂,30%过氧化氢作氧源,在一定温度下可以将环己酮或环己醇/环己酮混合物高产率地氧化成己二酸。讨论了30%过氧化氢的量、反应时间、反应温度、催化剂用量、醇酮比和草酸对己二酸产量的影响。结果表明:反应温度为90°C,30%H2O2为0.4 mol,草酸作酸性配体,钨酸钠催化氧化环己酮反应12 h,制得的己二酸的最大产率仅为71.8%。而磷钨酸作催化剂反应8 h,己二酸的最大产率高达95.1%。同时,不用酸性配体,磷钨酸对环己酮或环己酮/环己醇混合液也表现出很高的催化活性,在优化条件下己二酸产率可达87.5%或82%。更多还原

【Abstract】 Cyclohexanone or the mixture of cyclohexanone and cyclohoexanol can be directly oxidized to adipic acid with 30% H₂O₂ in the presence of Na₂WO₄·2H₂O or H₇[P（W₂O₇）₆]·xH₂O without any phase transfer catalyst and organic solvent.The effects of amount of 30% H₂O₂,reaction time,temperature,amount of the catalyst,proportion of cyclohexanone to cyclohoexanol and oxalic acid on the oxidation reaction are investigated.The yield of adipic acid is 71.8% with Na₂WO₄·2H₂O as catalyst and oxalic acid as ligand at（90°C）.When using H₇[P（W₂O₇）₆]·xH₂O as catalyst,95.1% yield of adipic acid can be reached at（90°C）.In the absence of acidic ligand,H₇[P（W₂O₇）₆]·xH₂O can still perform very well in the oxidation of cyclohexanone or the mixture of cyclohexanone and cyclohoexanol.The yield of adipic acid can reach 87.5% or 82% under optimum conditions.更多还原