2025-04-02 東京科学大学
＜関連情報＞
- https://www.isct.ac.jp/ja/news/umokroggnmdl
- https://www.isct.ac.jp/plugins/cms/component_download_file.php?type=2&pageId=&contentsId=1&contentsDataId=1212&prevId=&key=c3330cc2a9072a6408d75ffa65b97552.pdf
- https://onlinelibrary.wiley.com/doi/10.1002/anie.202424442
ゼオライトブレンディング：アルミノシリケートゼオライトの新しい直接結晶化手法 Zeolite Blending: A New Approach to Direct Crystallization of Aluminosilicate Zeolite
Masato Sawada, Kensuke Okubo, Yao Lu, Samya Bekhti, Hiroto Toyoda, Liang Zhao, Hiroaki Onozuka, Susumu Tsutsuminai, Junko N. Kondo, Hermann Gies, Toshiyuki Yokoi
Angewandte Chemie International Edition Published: 10 February 2025
DOI:https://doi.org/10.1002/anie.202424442
Graphical Abstract
The blending of two types of zeolites, MFI and Beta, as raw material in the interzeolite conversion/transformation method resulted in the collection of the required composite building-units of the CON-type topology, leading to the direct crystallization of the CON-type aluminosilicate with high Al content (Si/Al=20).
Abstract
Various synthesis methods for zeolites have been developed to date; however, precise control over aluminum (Al) content remains a significant challenge. For instance, in the case of CON-type zeolites, it is especially difficult to obtain a Si/Al ratio below a value of approximately 100 by direct synthesis, and below approximately 30 by post-treatment. In this study, we have developed a novel direct synthesis method of the CON-type zeolite having desired Al content by applying the interzeolite conversion/interzeolite transformation, wherein precursor zeolites that possess common composite building units (CBUs) with the target zeolite are employed as the Al and Si source. Initially, a single zeolite was utilized as a precursor, resulting in the successful synthesis of a high Al CON-type zeolite (Si/Al=40). Finally, we developed a novel synthesis method of the CON-type zeolite; blending of two types of zeolites, MFI and Beta, as starting material in the IZC method led to the direct crystallization of the CON-type aluminosilicate with high Al content (Si/Al=20).
