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A Cationic Oligomer as an Organic Template for Direct Synthesis of Aluminosilicate ITH Zeolite
Author(s) -
Lei Chi,
Dong Zhuoya,
Martínez Cristina,
MartínezTriguero Joaquín,
Chen Wei,
Wu Qinming,
Meng Xiangju,
Parvulescu AndreiNicolae,
De Baerdemaeker Trees,
Müller Ulrich,
Zheng Anmin,
Ma Yanhang,
Zhang Weiping,
Yokoi Toshiyuki,
Marler Bernd,
De Vos Dirk E.,
Kolb Ute,
Corma Avelino,
Xiao FengShou
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202003282
Subject(s) - zeolite , aluminosilicate , cationic polymerization , oligomer , selectivity , crystallinity , materials science , chemical engineering , inorganic chemistry , chemistry , organic chemistry , polymer chemistry , catalysis , composite material , engineering
There are a large number of zeolites, such as ITH, that cannot be prepared in the aluminosilicate form. Now, the successful synthesis of aluminosilicate ITH zeolite using a simple cationic oligomer as an organic template is presented. Key to the success is that the cationic oligomer has a strong complexation ability with aluminum species combined with a structural directing ability for the ITH structure similar to that of the conventional organic template. The aluminosilicate ITH zeolite has very high crystallinity, nanosheet‐like crystal morphology, large surface area, fully four‐coordinated Al species, and abundant acidic sites. Methanol‐to‐propylene (MTP) tests reveal that the Al‐ITH zeolite shows much higher selectivity for propylene and longer lifetime than commercial ZSM‐5. FCC tests show that Al‐ITH zeolite is a good candidate as a shape‐selective FCC additive for enhancing propylene and butylene selectivity.