硫酸铁与三氯化铝固体超强酸对戊烷异构化的催化性能研究

ISOMERIZATION OF PENTANE ON SOLID SUPER ACID——AlCl_3Fe_2(SO_4)_3 MIXTURE

本文论述了硫酸铁与三氯化铝混合催化剂对戊烷异构化反应的影响,详细研究了催化剂的制备条件和对戊烷的异构化反应及反应速率的影响.试验结果表明:等摩尔的无水硫酸铁与三氯化铝混合得到的催化剂,能使戊烷在15～18℃下异构化反应,25h后,戊烷转化率72.3%.AlCl_3·Fe_2(SO_4)_3的催化活性与水合硫酸铁脱水温度、比表面,催化剂的组成等有关,当水合硫酸铁的脱水温度在386℃左右.AlCl_3/Fe_2(SO_4)_3≥3/7时,混合物催化活性高,催化活性中心主要在Fe_2(SO_4)上,而且等摩尔AlCl_3和Fe_2(SO_4)_3的混合物是固体超强酸,其最高酸度为-14.52<Ho<-13.75。

The preparation and properties of a series of solid super acid,AlCl_3·Fe_2(SO_4)_3,have been reported.The mixture showed a strong acidity with-14.52<Ho<-13.75.By use of the Fe_2(SO_4)_3 and the AlCl_3, a solid super acid named as AlCl_3·Fe_2(SO_4)_3 could be produced.The isomerization of n-pentane was studied at 15～18℃.After 25 hours, The conversion rate of pentane was 72.3%.