超稳Y沸石封装磷钨酸的制备、表征及其催化性能

化工学报 ›› 2010, Vol. 61 ›› Issue (6): 1463-1468.

• 催化、动力学与反应器 • 上一篇下一篇

超稳Y沸石封装磷钨酸的制备、表征及其催化性能

曾湘;袁霞;吴剑;罗和安

湘潭大学化工学院

出版日期:2010-06-05 发布日期:2010-06-05

Preparation, characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite

ZENG Xiang;YUAN Xia;WU Jian; LUO He’an

Online:2010-06-05 Published:2010-06-05

摘要/Abstract

摘要： 采用“瓶中造船”方法制备了超稳Y沸石封装的磷钨酸催化剂PW-USY，并用FT-IR、UV-vis，N2吸附，NH3-TPD等手段对其进行了表征，并与浸渍法制备的负载催化剂PW/USY进行了比较，结果表明在超稳Y沸石超笼中成功合成了具有Keggin结构的12-磷钨酸。在以H2O2为氧源的环己酮氨肟化反应中，封装型磷钨酸催化剂表现出较好的催化活性，选择性较纯磷钨酸有所降低。封装型磷钨酸催化剂重复使用5次后，催化性能没有明显的下降，较负载型磷钨酸而言能较好地解决活性组分流失的问题，显示出潜在的应用前景。

关键词:

磷钨酸, 瓶中造船, 氨肟化

Abstract:

Phosphotungstic acid encapsulated in ultra stable Y zeolite (PW-USY) was prepared by the “ship in the bottle” synthesis.The obtained catalysts were characterized with FT-IR, ICP, UV-vis, N2-adsorption, XRD and SEM techniques.Compared with immobilized catalysts (PW/USY), it was demonstrated that encapsulation of Keggin-type 12-phosphotungstic acid in the supercage of USY zeolite was realized.In the ammoximation of cyclohexanone system with H2O2 as oxygen source, PW-USY showed better catalytic activity than PW/USY.Moreover, the catalytic performance of PW-USY did not drop apparently after using five times, and could solve the leakage problem of active component in polar reaction media better than immobilized catalysts (PW/USY).

Key words:

磷钨酸, 瓶中造船, 氨肟化

曾湘, 袁霞, 吴剑, 罗和安. 超稳Y沸石封装磷钨酸的制备、表征及其催化性能 [J]. 化工学报, 2010, 61(6): 1463-1468.

ZENG Xiang, YUAN Xia, WU Jian, LUO He’an. Preparation, characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite[J]. CIESC Journal, 2010, 61(6): 1463-1468.

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超稳Y沸石封装磷钨酸的制备、表征及其催化性能

Preparation, characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite

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