摘要
采用新工艺制备固体超强酸SO42-/SnO2-Nb2O5,将其应用于松油酯化反应。催化剂最佳制备条件:Nb2O5引入(SnO2质量分数)3%,浸渍硫酸浓度1.5 mol/L,500℃焙烧3.0 h;最佳反应条件:n(松油醇):n(乙酸酐)=1.0:1.2,催化剂用量(松油醇质量分数)5%,50℃反应3.0 h;并采用FT-IR、XRD、TG-DTA对催化剂进行表征。结果表明:催化剂可使得松油醇转化率达94.3%,乙酸松油酯选择性达86.2%,新工艺制备的催化剂较沉淀法和sol-gel法的活性高。
Use a new technology to prepare Soild superacid of SO4^2-/SnO2-Nb2 O5. Applied it to catalyze the esterification of terpine- oL The optimum preparation conditions for the catalyst are:content of Nb2O5 3% (mass fraction in SuO2 ), impregnated with 1.5 moL./L, calcinated at 500℃ for 3 h. The optimum reaction conditions for the estarification of terpineol are:n (terpineol) :n (acetic anhydride)= 1. 0:1. 2,catalyst quantity 5% (mass fraction in terpineol) ,react at 50 ℃ for 3 h. These catalysts were characterized by XRD,FT-IR and TG-DTA. The results show that:the conversion of terpincol reached 94. 3%and the Selectivity of Terpinyl acetate reached 86. 2% in the reaction, the new method is much better than precipitation and sol-gel in preparation of catalyst.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2012年第6期940-947,共8页
Chemical Research and Application
基金
肇庆市科技计划项目(2009G013)资助
肇庆市科技创新计划项目(2011G28)资助
广东省普通高校工程技术开发中心建设项目(GCZX-B0902)资助
关键词
新工艺
固体超强酸
五氧化二铌
酯化
乙酸松油酯
制备
表征
New technology
Soild superacid
Niobium pentaoxide
Esterify
Terpinyl
Preparation
Characterization