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氧化镧复合中孔氧化物的合成、表征及催化性能
引用本文:宋伟明,邓启刚.氧化镧复合中孔氧化物的合成、表征及催化性能[J].石油化工高等学校学报,2008,21(3):13-15,20.
作者姓名:宋伟明  邓启刚
作者单位:齐齐哈尔大学化学化工学院,黑龙江齐齐哈尔,161000
基金项目:黑龙江省青年骨干教师资助项目 
摘    要:以十二烷基硫酸钠(SDS)为模板剂,尿素和乙二胺为介质,当n(La)/n(SDS)/n(CO(NH2)2)/n(H2NCH2CH2NH2)/n(H2O)=1.0:1.0:0.6:1.0:200,反应温度为80℃、反应时间为4h时,用水热法合成了氧化镧/十二烷基硫酸钠复合中孔材料(LaOS)。通过XRD,IR,TG/DTA和N2吸附脱附等方法对样品的晶体结构和表面物性进行了研究。结果表明,合成的氧化镧/十二烷基硫酸钠复合物具有典型的六方中孔结构特征,比表面积为182m^2/g,平均孔径为2.6nm。将氧化镧/十二炕基硫酸钠复合物用于催化正辛醇乙氧基化反应,当LaOS的质量分数为10%,反应温度为120℃,初始反应压力0.5MPa时,环氧乙烷的平均反应速率为3.7mol/(mol·h)。产物正辛醇聚氧乙烯醚相对分子质量分布较窄。

关 键 词:氧化镧/十二烷基硫酸钠  中孔材料  表征  催化  乙氧基化

Synthesis, Characterization and Catalysis Performance of Lanthanum Composite Mesoporous Oxide
SONG Wei-ming,DENG Qi-gang.Synthesis, Characterization and Catalysis Performance of Lanthanum Composite Mesoporous Oxide[J].Journal of Petrochemical Universities,2008,21(3):13-15,20.
Authors:SONG Wei-ming  DENG Qi-gang
Affiliation:SONG Wei-- ming, DENG Qi-- gang (College of Chemistry and Chemical Engineering of Qiqihar University ,Qiqihar Heilongjiang 161006 ,P. R. China)
Abstract:Lanthanum oxide/dodecyl sulfate mesoporous material (LaOS) was synthesized by hydrothermal method with SDS as template and ethylenediamine as medium. The experimental results indicate that the material had the ordered mesoporous pore structure when n(La)/n(SDS)/n(CO(NH2)1)/n(H2NCH2CH2NH2)/n(H20)=1. 0 : 1.0 : 0.6 : 1.0 : 200, stirring at 80 ℃ and 4 h using several measurements such as XRD, IR,TG/DTA,N2 adsorption desorption. The results indicate that the material had the medial pore structure with average pore diameter of 2. 6 nm and the specific surface area of 182 m^2/g. The LaOS materials were used as catalysts in the ethoxylation reaction. The results show that the material was highly catalytic activity. Experiment indicates that the optimum processing parameters are :120 ℃, 0. 5 MPa,mass fraction of 10% catalyst (LaOS) and average reaction rate of epoxy ethane is 3. 7 mol/(mol · h). And narrowed chain distributions of octanol polyoxyethlene were formed in the presence of LaOS catalyst.
Keywords:Lanthanum oxide/dodecyl sulfate  Mesoporous material  Characterize  Catalysis  Ethoxylation
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