制备条件对KF/MgO-Al2O3催化正丁醛自缩合反应性能的影响  

INFLUENCES OF PREPARATION CONDITION ON THE CATALYTIC PERFORMANCE OF KF/MgO-Al_2O_3 FOR n-BUTANAL SELF-CONDENSATION

作　　者：何茜[1] 吴丽丽[1] 安华良[1] 赵新强[1] 王延吉[1] 

机构地区：[1]河北工业大学化工学院,绿色化工与高效节能河北省重点实验室,天津300130

出　　处：《精细石油化工》2017年第1期1-6,共6页Speciality Petrochemicals

基　　金：国家自然科学基金项目(21476058)

摘　　要：采用等体积浸渍法制备了负载型KF催化剂,考察了载体种类和制备条件对催化剂性能的影响。适宜的制备条件是:以MgO-Al_2O_3为载体,KF负载量为15.0%(质量分数),在600℃焙烧5h。其中,MgO-Al_2O_3是以硝酸镁和硝酸铝为前驱体(n(Mg)/n(Al)为3∶1)、在N2气氛中500℃焙烧4h制备而成。以此条件下制备的KF/MgO-Al_2O_3为催化剂,催化正丁醛自缩合合成辛烯醛的反应,正丁醛的转化率为96.8%,辛烯醛的收率和选择性分别为84.5%和87.3%。Supported KF catalysts were prepared by incipient-wetness impregnation and the effects of the kinds of support and preparation conditions on the catalytic performance of the supported KF catalysts were investigated.The suitable preparation conditions of KF/MgO-Al2O3 were obtained as follows：loading amount of KF of 15.0%（w）,calcination temperature of 600℃and calcination time of 6h.MgO-Al2O3 was prepared by calcinating a mixture of magnesium nitrate and aluminum nitrate with a Mg/Al（molar ratio）of 3∶1at calcination temperature of 500℃and calcination time of 4hin an atmosphere of N2.The conversation of n-butanal,the yield and the selectivity of 2-ethyl-2-hexenal were separately 96.8%,84.5%and 87.3% over KF/MgO-Al2O3 prepared under above conditions.

关 键 词：正丁醛 辛烯醛 羟醛缩合 制备条件 氟化钾 酸碱双功能催化剂 

分 类 号：O643.36[理学—物理化学]