摘要
以不同浓度的H2SO4对膨润土进行改性,得到酸化膨润土催化剂x%H2SO4-BN(x=20,25,30,35,40),通过XRD,BET,FT-IR,Py-IR和NH3-TPD对膨润土的结构和性质进行表征,证明膨润土经酸化后,骨架结构基本没有变化,但是其比表面和孔容有很大的提高,且弱酸位增多.将其用于催化乙醇(EtOH)和叔丁醇(TBA)合成乙基叔丁基醚(ETBE)的醚化反应.结果表明,30%H2SO4-BN催化活性最好,最佳实验条件:催化剂用量为3.5%(催化剂与叔丁醇的质量百分比),反应温度130℃,原料摩尔比(EtOH:TBA)为2∶1.
Bentonites have been treated by different concentrations H2SO4 solution, and x% H2SO4-BN （x = 20, 25, 30, 35, 40） catalysts are obtained. XRD, BET, FT-IR, Py-IR and NH3-TPD are used to investigate the structure and properties of the bentonites, suggesting that the skeleton structure of the bentonites is not changed. Its surface area and pore volume are greatly improved in turn, and the week acid sites increase. Evaluation reaction of synthesis of ETBE from ethanol （EtOH） and tea-butyl alcohol （TBA） shows that 30% H2SO4-BN have the best catalytic activity, and the optimum experimental condition has been investigated.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2013年第5期413-419,共7页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金(批准号:21062013和21261017)
江西省自然科学基金(批准号:20122BAB203009)
江西省教育厅基金(批准号:GJJ08024)
关键词
酸化膨润土
ETBE
醚化反应
acid activated bentonites
ETBE
etherification
