Organotemplate-Free Synthesis of a High-Silica Zeolite with a TON Structure in the Absence of Zeolite Seeds

A high‐silica zeolite with a TON structure designated as ZJM‐4 was successfully synthesized in the absence of any organic templates and zeolite seeds. Many factors such as the SiO2/K2O ratio, Si/Al ratio, SiO2/H2O in the starting aluminosilicate gels, crystallization temperature, and crystallization...

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Bibliographic Details
Published in:European journal of inorganic chemistry 2016-03, Vol.2016 (9), p.1364-1368
Main Authors: Yeqing Wang, Zhu, Chenqi, Qiu, Jing, Jiang, Fan, Meng, Xiangju, Wang, Xiong, Lei, Chi, Jin, Yinying, Pan, Shuxiang, Xiao, Feng-Shou
Format: Article
Language:English
Subjects:
Aluminosilicates
Aluminum
Aluminum silicates
Catalysts
Crystallization
Isomerization
Seeds
Silicon dioxide
Zeolite building units
Zeolites
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Summary:A high‐silica zeolite with a TON structure designated as ZJM‐4 was successfully synthesized in the absence of any organic templates and zeolite seeds. Many factors such as the SiO2/K2O ratio, Si/Al ratio, SiO2/H2O in the starting aluminosilicate gels, crystallization temperature, and crystallization time strongly influence the formation of the ZJM‐4 zeolite. Interestingly, this synthesis shows very efficient silica utilization in the starting gels (>80 %). Catalytic tests on the isomerization of m‐xylene to p‐xylene show that the ZJM‐4 catalyst has high selectivity to p‐xylene (ca. 80 %), which could be potentially important for industrial applications for the ZJM‐4 zeolite as a candidate catalyst in the future. A high‐silica aluminosilicate zeolite with a TON structure designated as ZJM‐4 was successfully synthesized in the absence of any organic templates and zeolite seeds. This route has efficient silica utilization, and the zeolite product has a stable tetrahedral aluminum species.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201501223