摘要
以硅酸钠为硅源、硫酸铝为铝源、CTAB为模板剂,采用水热法合成了骨架负载型固体酸Al-MCM-41介孔分子筛催化剂,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)和红外(IR)方法对其进行了表征,同时研究了该催化剂在二芳基乙烷合成反应中的催化性能。考察了各种反应因素的影响,确定其最佳合成条件为:原料m(苯乙烯)∶m(二甲苯)=1∶7.5,催化剂用量为1%(总投料质量分数),反应时间为3 h,反应温度为140℃,产率可达87.1%,比传统催化剂浓硫酸提高了17%。研究结果表明,该催化剂是替代液体酸合成二芳基乙烷的理想固体酸催化剂。
Al-MCM-41 mesoporous sieves were synthesized by using Na2SiO3 as silica source,Al2（SO4）3 as aluminum source,and cetyltrimethylammonium bromide（CTAB） as template under hydrothermal condition.The Al-MCM-41 mesoporous sieves were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and infrared spectroscopy（IR）.The synthesis of diphenylethane over Al-MCM-41 catalyst and its catalytic performance were investigated.The results show that the optimal conditions were the mass percent of catalyst was 1% of the feed stock;molar ratio of xylene to styrene was 7.5∶1;reaction temperature was 140 ℃ and reaction time 3 h.The yield of diphenylethane under such conditions was about 87.1%,which was 17% higher than the yield when traditional sulfuric acid was used as catalyst.The results show that Al-MCM-41 is a promising solid acid catalyst for the synthesis of diphenylethylane instead of liquid acid.
出处
《应用化学》
CAS
CSCD
北大核心
2009年第12期1404-1408,共5页
Chinese Journal of Applied Chemistry
基金
新疆自治区科技攻关重大专项项目(200732139)
校博士启动基金(BS080115)资助项目
