作　　者： ; ; ; ; ; ;

机构地区： 中国科学院广州能源研究所

出　　处： 《现代化工》 2009年第S2期196-199,201,共5页

摘　　要： 采用共沉淀-溶胶凝胶法使Ti配位结合到氰基络合物,制备了双金属固体酸催化剂,并对其催化甲酯化的催化效果进行了测试,结果表明其中Fe-Zn催化活性最高。含Ti纳米络合物优于Fe-Zn催化剂,在相同的条件下(催化剂加入量为质量分数3%、反应温度70℃、醇油摩尔比6∶1、反应时间2 h),TiO2纳米颗粒明显提高了Fe-Zn催化剂的催化作用,废油酸值由140 mg(KOH)/g降到40 mg(KOH)/g,转化率达70%。红外光谱与热分析法证实了Ti连接到络合物;添Ti使催化剂由Zn4[Fe(CN)6]3.3H2O.2(t-BuOH)变为Zn2Ti2[Fe(CN)6]3.3H2O.2(t-BuOH).3TiO2。 Double metal solid acid catalyst are prepared by coprecipitation-solgel method to make titanium integrate into cyano-complex compound and the catalytic effects of the methyl ester catalyzed are tested.The results show that Fe-Zn has the best catalytic ability among the prepared catalysts.And the nano-TiO2 in the catalyst can improve the catalytic ability even more,which 70% of yield can be achieved with 3%wt of catalysts and 6∶1 of methanol to oil ratio under 70℃ after 2 hours of reaction,with the acidic value coming down from 140 mgKOH/g to 40 mgKOH/g.FT-IR and heat analysis confirm that Zn4[Fe(CN)6]3·3H2O·2(t-BuOH) is converted to Zn2Ti2[Fe(CN)6]3·3H2O·2(t-BuOH)·3TiO2 after the addition of Ti.

关 键 词： 废油脂 脂肪酸甲酯 纳米催化剂 氰基络合物

领　　域： [一般工业技术] [石油与天然气工程]