铁镧交联蒙脱土的合成及催化氧化性能  

Synthesis of Fe/La-Cross-Linked Montmorillonite and Its Catalytic Oxidation Performance

作　　者：宋贺[1] 郭祥峰[1] 贾丽华[1] 

机构地区：[1]齐齐哈尔大学,黑龙江齐齐哈尔161006

出　　处：《化学反应工程与工艺》2009年第4期306-310,共5页Chemical Reaction Engineering and Technology

基　　金：黑龙江省自然科学基金(E200530);黑龙江省科技攻关计划资助项目(2004G0332-00)

摘　　要：以临安钠基蒙脱土为原料,制备了铁交联和铁镧复合交联蒙脱土催化剂,利用物理吸附(BET)、扫描电镜(SEM)和X-射线衍射(XRD)对催化剂进行表征,并以铁镧复合交联蒙脱土(Fe/La-PILC)为催化剂,质量分数为30%的过氧化氢水溶液为氧化剂,考察反应时间、催化剂用量和过氧化氢用量对苯甲醇催化氧化制苯甲醛的影响。结果表明:铁镧复合交联蒙脱土形成了比较均一的中孔骨架结构;当苯甲醇与过氧化氢物质的量之比为1:2,Fe/La(200)-PILC(Fe与La物质的量之比为200)质量分数为4%,反应5 h时,苯甲醇转化率和苯甲醛选择性分别为62.1%和86.4%。研究铁镧交联蒙脱土催化剂的催化氧化机理,发现Fe/La-PILC催化氧化苯甲醇的活性氧来自于Fe/La-PILC所吸附的氧。The Fe-linked montmorillonite （Fe-PILC） and Fe/La-cross-linked montmorillonite （Fe/La-PILC） catalysts were synthesized from Linran Na-Mont. And the catalysts were characterized by means of N2-physisorption （BET）, scanning electron microscope （SEM） and X-ray diffraction （XRD）. The oxidation of benzyl alcohol with H2O2 （mass fraction 30%） to benzaldehyde was carried out. The results showed that the framework fabric of homogeneous mesopores was formed in the cross-linked montmorillonite. And the conversion of benzyl alcohol and the selectivity of benzaldehyde reached 62.1% and 86.4%, respectively, under the conditions of molar ratio of alcohol to hydrogen peroxide 1 ： 2, mass fraction of Fe/La（200）-PILC 4% and reaction time 5 h. The active oxygen species in the reaction is the absorbed oxygen of Fe/La-PILC.

关 键 词：铁镧复合交联蒙脱土 苯甲醇 苯甲醛 催化氧化 

分 类 号：TQ203.2[化学工程—有机化工] TQ426.83