摘要
Abstract
In this paper,zirconium oxychloride and ammonia as raw material,ethylene glycol-water solution as solvent,a series of oxides were prepared by hydrothermal method under different conditions,the oxide was characterized by IR,SEM characterization.The results show that the direct hydrothermal synthesis of zirconia sample size is small,uniform particles,large surface area.The obtained zirconia solid super acid 0.5 mol/L H2SO4 impregnation treatment.Knowledge superacid catalysts were found by infrared analysis of the samples.Preparation of zirconia supported phosphotungstic acid catalyst prepared catalysts were characterized and the esterification reaction and catalyst recovery and reuse experiments.Catalyst preparation process:the use of 550 ℃ annealing of zirconia immobilized phosphotungstic acid,phosphotungstic acid load of 23％,and then baked in the 100 ℃ air atmosphere.Synthetic methyl optimum reaction conditions:molar ratio of 40 ∶ 1,catalyst amount was 30％t of the acid quality of the reaction time is 4 hours.关键词
ZrO2/磷钨酸/固体超强酸/酯化反应Key words
ZrO2/Phosphotungstic acid/Solid superacid catalyst/Esterification分类
化学化工
