ZnCl_2/Al_2O_3催化尿素和1,2-丙二醇合成碳酸丙烯酯

Catalytic Synthesis of Propylene Carbonate from Urea and 1,2-Propylene Glycol on ZnCl_2/Al_2O_3

以Al2O3为载体,采用浸渍蒸发法制备了负载型ZnCl2/Al2O3固体酸催化剂,将其应用于催化尿素和1,2-丙二醇合成碳酸丙烯酯,采用XRD、FTIR等手段分析了ZnCl2与载体Al2O3的结合情况,考察了原料配比、反应温度、催化剂用量、反应时间等条件对反应效果的影响。结果表明,在最佳反应条件下,碳酸丙烯酯的收率可达68.2%。

Supported ZnCl2 solid acid catalyst was prepared by the impregnation-evaporation method using γ-Al2O3 as the support.The catalytic performance of the catalyst for the synthesis of propylene carbonate from urea and 1,2-propylene glycol was investigated.The interaction of ZnCl2 and Al2O3 was studied by XRD and FT IR.The effects of feed ratio,reaction temperature,catalyst dosage and reaction time on the yield of the product were studied.The yield of propylene carbonate reached 68.2% on the ZnCl2/Al2O3 catalyst under the optimum reaction conditions.