酸处理对铌酸催化剂性能的影响  

Effects of acid treatment on the catalytic properties of niobic acid

作　　者：陈君琴[1] 彭英丹[1] 俞丹群[1] 刘纯山[1] 

机构地区：[1]华东理工大学工业催化研究所,上海200237

出　　处：《工业催化》2004年第8期50-52,共3页Industrial Catalysis

摘　　要：用XRD、原位红外和BET等考察了铌酸经硝酸、磷酸处理后的结构特征、表面酸性以及催化活性。酸处理改变了铌酸的表面酸性和结构特征,同时使铌酸即使在450℃以上热处理也不结晶,并且对2,5 二甲基 2,4 己二烯的Prins缩合反应具有很高的活性和使用寿命。The effects of treatment of niobic acid with nitric acid and phosphoric acid on its surface structure,acidity and catalytic activity were studied using XRD, in situ FT-IR and BET. It was found that acid treatment improved the surface acidity and structure of niobic acid.As the result, no crystallization of niobic acid was observed even it was thermally-treated at over 450 ℃.The acid-treated niobic acid exhibited high activity and long service life for Prins condensation reaction of 2,5-dimethyl-2,4-hexadiene.

关 键 词：铌酸 酸处理 2 5-二甲基-2 4-己二烯 

分 类 号：TQ426.94[化学工程] O614.51[理学—无机化学]