超强酸催化剂MoO_3/ZrO_2-SiO_2的表征及活性评价
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摘要
用浸渍法成功制得固体超强酸催化剂MoO3/ZrO2-SiO2,通过XRD、BET、TEM和DSC-TG等方法对其形貌结构和性能方面进行表征,发现此种催化剂主要以无定型形态存在且热稳定性良好。通过酯化反应找到它的最佳制备工艺条件pH值为10,陈化时间2h,活性物质浸渍2h后在850K温度下焙烧3h,活性组分的负载量为6%。
The solid superacid catalyst MoO_3/ZrO_2-SiO_2 was successfully prepared by impregnation method. The morphology,structure and properties of the catalyst were characterized by XRD,BET, TEM and DSC-TG. It was found that the catalyst mainly existed in amorphous form and had good thermal stability. Through esterification reaction, the optimum preparation conditions were found as follows: pH value 10, aging time 2 h, soaking active substance 2 h,roasting at 850 K for 3 h, and loading of active ingredient 6%.
The solid superacid catalyst MoO_3/ZrO_2-SiO_2 was successfully prepared by impregnation method. The morphology,structure and properties of the catalyst were characterized by XRD,BET, TEM and DSC-TG. It was found that the catalyst mainly existed in amorphous form and had good thermal stability. Through esterification reaction, the optimum preparation conditions were found as follows: pH value 10, aging time 2 h, soaking active substance 2 h,roasting at 850 K for 3 h, and loading of active ingredient 6%.
引文
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[2]Hue W,MiaoC X,Gao Z.Study on AlCl3 as catalyst in synthysis[J].Cattal let,1996,37:187.
[3]Hino M,Arata K.Reaction of Butane to Isobutane Catalyzed by Iron oxide Treated with Sulafte Ion Solid Su Peracid Caatlsy[J].Chem Lett,1979,1259-1260.
[4]蒋文伟.超强酸催化剂的研究进展[J].精细化工,1997,14(1):46-49.
[5]张小曼,崔永春.磁性SO2-/ZrO2固体超强酸催化合成丁酸丁酯的研究[J].精细化工,2002,19(7):400-402.