一种新的具有在 ZSM-5 和β沸石之间的孔体系的铝硅酸盐分子筛。

A new aluminosilicate molecular sieve with a system of pores between those of ZSM-5 and beta zeolite.

机构信息

Instituto de Tecnología Química (UPV-CSIC), Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas, Valencia 46022, Spain.

出版信息

J Am Chem Soc. 2011 Jun 22;133(24):9497-505. doi: 10.1021/ja2015394. Epub 2011 May 27.

DOI:10.1021/ja2015394

PMID:21591745

Abstract

A new aluminosilicate zeolite (ITQ-39) has been synthesized. This is an extensively faulted structure with very small domains that makes the structure elucidation very difficult. However, a combination of adsorption spectroscopy and reactivity studies with selected probe molecules suggests that the pore structure of ITQ-39 is related to that of Beta zeolite, with a three-directional channel system with large pores (12-MR), but with an effective pore diameter between those of Beta and ZSM-5, or a three-directional channel system with interconnected large (12-MR) and medium pores (10-MR). The pore topology of ITQ-39 is very attractive for catalysis and shows excellent results for the preparation of cumene by alkylation of benzene, while it can be a promising additive for FCC.

摘要

一种新型的铝硅酸盐沸石（ITQ-39）已经被合成。这是一种具有非常小的域的广泛缺陷结构，使得结构阐明非常困难。然而，吸附光谱学和对选定探针分子的反应性研究的结合表明，ITQ-39 的孔结构与 Beta 沸石有关，具有三维通道系统和大孔（12-MR），但有效孔径在 Beta 和 ZSM-5 之间，或者具有相互连接的大孔（12-MR）和中孔（10-MR）的三维通道系统。ITQ-39 的孔拓扑结构对催化非常有吸引力，并在苯的烷基化制备异丙苯方面表现出优异的结果，同时它也可以成为 FCC 的一种有前途的添加剂。