摘要
研究了蒙脱土(MMT)负载硝酸铁制备的固体酸催化剂(Fe2O3/H-MMT)在四氢呋喃(THF)开环聚合中的催化性能。考察了催化剂的制备条件和乙酸酐用量对催化活性和聚四氢呋喃(PTHF)粘均相对分子质量的影响。结果表明,在酸化处理用酸浓度为3.00 mo.lL-1,Fe2O3负载量为18%(质量分数),焙烧温度为400℃下制备的催化剂,反应5 h,催化活性为1.17 g.g-1Cat.h-1。催化活性随乙酸酐用量的增加而增大。催化剂的制备条件对PTHF的相对分子质量影响不大,受乙酸酐用量的影响。
The ring - opening polymerization of THF was catalyzed by loaded montmorillonite （ Fe2O3/H -MMT）. The conditions for the preparation of catalyst and polymerization of PTHF were studied. The results indicated that the catalytic activity would reach 1.17 g·g^-1 Cat·h^-1 under 50 ℃ for 4 h when the acidity of solution used in acidification 3. 00 mol·L^-1, Fe2O3 loading 18% , and the roasting temperature 400 ℃. The catalytic activity was enhanced as n（ Ac2O） ：n（THF） increased. The viscosity -average molecular weight of the PTHF was seldom affected by the preparation conditions of catalyst, but it was affected by n（ Ac2O）：n （THF）.
出处
《化工时刊》
CAS
2010年第1期23-25,共3页
Chemical Industry Times
关键词
PTHF
开环聚合
固体酸催化
蒙脱土
PTHF ring - opening polymerization non - homogeneous catalyst montmorillonite
