固体超强酸SO_4~(2-)-MoO_3-TiO_2的制备及其催化酯化性能研究

ＳＯ2 -4 ＭｘＯｙ 型固体超强酸自问世以来一直受到人们的广泛关注 ,已对其进行了大量的研究。该类催化剂的酸强度高 ,在烷基化、酰基化、裂解、醇脱水、异构化、酯化等反应中有很高的催化活性。最常用的氧化物基体是ＺｒＯ2 和ＴｉＯ2 ,最好的促进剂是ＳＯ2 -4 。也有用ＭｏＯ3作促进剂的1～3] ,得到相应的超强酸催化剂。作者在ＳＯ2 -4 ＴｉＯ2 超强酸的基础上 ,将ＭｏＯ3和ＳＯ2 -4 同时负载在ＴｉＯ2基体上 ,得到ＳＯ2 -4 ＭｏＯ3 ＴｉＯ2 固体超强酸 ,以乙酸异戊酯的合成为探针反应考察了该催化剂的催化酯化活性 ,并与ＳＯ2 -4 …

STUDY ON CATALYTIC PERFORMANCE OF SO_4~(2-)-MoO_3-TiO_2 IN ESTERIFICATION

In this paper a new solid superacid catalyst SO 2- 4 MoO 3 TiO 2 was prepared.The activity of the catalyst in esterification of acetic acid and iso amyl alcohol was measured and compared with that of SO 2- 4 TiO 2 and MoO 3 TiO 2.The results showed that SO 2- 4 MoO 3 TiO 2 had better catalytic performance than SO 2- 4 TiO 2 and MoO 3 TiO 2.There was evident coordination between MoO 3 and SO 2- 4 when they coexisted on TiO 2.