邻苯基苯酚的合成工艺研究

Study on Synthesis of o - phenylphenol

以环己酮为原料,通过缩合制备出双聚体环己烯基环己酮,再经催化脱氢反应,合成出邻苯基苯酚。对缩合催化反应条件进行了优化,双聚体收率达91％;以γ-Al2O3为载体,贵金属Pt为脱氢活性组分,硫酸钾为助催化剂,制备的合成邻苯基苯酚的脱氢催化剂[w(Pt)=0.3％、w(K2SO4)=2％],在350℃反应,选择氢气流速为50 mL/min,邻苯基苯酚收率在90％以上。

Cyclohexenyl cyclohexanone was prepared from cyclohexanone by condensation and dehydrogenation reaction with sulfur acid as catalyst. The condensation reaction conditions were optimized and the yield of cyclohexenyl cyclohexanone is 91 %. Pt supported by γ- Al2O3 with K2SO4 as promotes were prepared and be used as dehydrogenation catalyst. The results shows that: catalyst consists w (Pt)=0.3%, w(K2SO4) =2% , the selectivity of OPP is more than 96% and the yield of OPP is as high as 90% in certain reaction conditions, in which temperature is 350℃ and flux of H2 is 50 mL/min.