Keggin型磷钼钒季铵盐催化氧化苯制苯酚反应研究

采用分步反应、分步酸化法制备了磷钼钒缺位型杂多酸，用（C4H9）4N^＋（以下简写为Bu4N^＋）阳离子取代杂多酸中H^＋作为反荷离子合成了杂多季铵盐（用于苯氧化制苯酚反应）．FT-IR分析反应前后催化剂结构的变化．以苯为原料，乙酸为溶剂，30％H2O2作氧化剂，系统考察了催化剂类型、催化剂用量、氧化剂用量、反应时间及温度对反应的影响．实验结果表明，56．4mmol苯在（Bu4N）5PMo10V2O40用量0．25mmol，30％H2O2用量10mL，溶剂乙酸10mL，70℃条件下回流反应6h，苯酚收率可达到27．9％．

The Catalytic Oxidation of Benzene to Phenol over Molybdovanadophosphoric Quaternary Ammonium with Keggin-type as Catalyst

A series of Molybdovanadophosphoric Quaternary Ammonium with Keggin-type were synthesized by multi-step method and characterized by means of IR.Using 30% aqueous hydrogen peroxide(30%H2O2) as oxidant and aetic acid as solvent,the catalytic oxidation activity for the synthesis of Phenol from Benzene by Molybdovanadophosphoric quaternary ammonium with Keggin-type was investigated.The effects of various parameters including the nature and the amount of the catalysts,reaction temperature and reaction time were ...