【摘要】 苯酚羟基化联产邻苯二酚和对苯二酚是一条典型的绿色工艺路线.通过对多种金属酸铁酸盐进行筛选,得出以Fe(NO3)3.9H2O为铁源、Cu(CH3COO)2.H2O为铜源,以氨水为沉淀剂,采用共沉淀法制备的Fe-Cu复合金属酸盐催化剂具有最好的催化活性.结果表明,在水作溶剂,催化剂与苯酚的质量比为1∶100,苯酚初始浓度25%,反应温度65℃,苯酚与双氧水的摩尔比为2的条件下,采用Fe-Cu催化剂,苯酚单程转化率可达25%,苯二酚总选择性在90%左右.通过对铁酸盐催化剂的XRD、IR表征,可以看出,Fe-Cu催化剂具有独特的CuFe2O4尖晶石结构,因而具有不同于其它铁酸盐的衍射峰和吸收峰.另外,Fe-Cu催化剂制备简便、原料廉价易得,因此具有良好的工业应用前景.更多还原

【Abstract】 Phenol hydroxylation with aqueous hydrogen peroxide was known as the most effective manufacture in the world.In this paper,a novel catalyst was synthesized via coprecipitation method from an aqueous solution containing Fe(NO₃)₃ 9H₂O and Cu(CH₃COO)₂ H₂O with ammonia.It was shown that phenol conversion was 25% and dihydroxybenzene total selectivity reaches 90% with Fe-Cu as catalyst,water as solvent,1% catalyst/phenol,25% phenol initial concentration,reaction temperature 65℃,phenol/H₂O₂ molar ratio=2.The X-ray diffraction peaks of the catalyst showed that the as-prepared sample has engendered CuFe₂O₄ crystal with spinel structure,which was also confirmed by its IR spectrum.Furthermore,Fe-Cu catalyst was an effective and promising catalyst with its convenient preparation and inexpensive metallic sources.更多还原