摘要
采用浸渍法制备硅钨酸/硅胶催化剂。以环己酮和乙二醇为原料,合成环己酮乙二醇缩酮。考察了环己酮与乙二醇物质的量比、硅钨酸/硅胶催化剂用量、反应时间对收率的影响。结果表明,硅钨酸/硅胶催化剂是合成环己酮乙二醇缩酮的良好催化剂,确定了最佳合成条件:n(环己酮)∶n(乙二醇)=1∶1.4,催化剂用量为反应物料总质量的1.36%,带水剂环己烷用量8 mL,反应时间45 min;在最佳条件下,环己酮乙二醇缩酮的收率可达77.5%。
A new environmental friendly catalyst, H4SiW12O40/silica gel was prepared with the method of impregnation. Cyclohexanone ethylene ketal was synthesized with cyclohexanone and ethylene glycol as the materials and with H4SiW12O40/SG as the catalyst. The effect of the ratio of n （cyclohexanone） ：n （glycol）, catalyst dosage and reaction time on the yield was investigated. The results have shown that silicotungstic acid/ silica gel is a good catalyst for the synthesis of cyclohexanone ethylene ketal. The optimum synthesis conditions were identified： n （cyclohexanone） ：n （glycol） = 1：1.4; mass ratio of catalyst to total reactants： 1.36%, reaction time ： 45 min, volume of water carrying agent cyclohexane ： 8 mL. The yield of cyclohexanone ethyl- ene ketal can be as high as 77.5% at these conditions.
出处
《精细石油化工进展》
CAS
2011年第2期53-55,共3页
Advances in Fine Petrochemicals
基金
湖北省自然科学基金资助项目(2005ABA053)
关键词
环己酮乙二醇缩酮
硅钨酸
硅胶
催化
cyclohexanone ethylene ketal
silicotungstic acid
silica gel
catalysis
