High-efficient Synthesis of Zeolite LTA via a Wet-gel Crystallization Route

doi:10.1007/s40242-017-7008-y

Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (4): 520-524.doi: 10.1007/s40242-017-7008-y

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High-efficient Synthesis of Zeolite LTA via a Wet-gel Crystallization Route

JI Yanyan¹, ZHANG Bing¹, ZHANG Wu², ZHAO Bo¹, LI Hongbo¹, WANG Dongmei³, LI Ying¹

1. School of Environmental and Chemical Engineering, State Key Laboratory of Separation Membranes and Membrane and Processes, Tianjin Polytechnic University, Tianjin 300387, P. R. China;
2. College of Marine and Environment Science, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, P. R. China;
3. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China

Received:2017-01-04 Revised:2017-05-04 Online:2017-08-01 Published:2017-06-05
Contact: JI Yanyan E-mail:jiyanyan@tjpu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China（Nos.21403193，51503148） and the Natural Science Foundation of Tianjin City，China（Nos.14JCQNJC02500，15JCQNJC09000）.

Abstract

Abstract:

Zeolite LTA has been largely used as good adsorbent and detergent builder with a huge amount of demand. Numerous efforts have been devoted to the exploration of new synthetic methods for preparing zeolites more conveniently and efficiently. Herein, we reported a wet-gel crystallization route to synthesize zeolite LTA from simple filtration of the initial reaction mixture followed by heating for crystallization. The products were characterized in detail by means of X-ray diffraction, Raman spectra, scanning electron microscopy and elemental analysis. The yields of the solid products were also investigated, which suggested that the wet-gel method afforded an obvious improvement of products yield compared with the conventional synthesis route. For application as detergent builder, the calcium ion exchange rates of the wet-gel synthesized zeolites were similar with that of conventional LTA zeolites. Therefore the wet-gel route would be potentially important in industry due to its advantages of easy-performing, high-yielding and energy-saving.

Key words: Zeolite LTA, Hydrothermal crystallization, Wet-gel crystallization route, Calcium ion exchange property

JI Yanyan, ZHANG Bing, ZHANG Wu, ZHAO Bo, LI Hongbo, WANG Dongmei, LI Ying. High-efficient Synthesis of Zeolite LTA via a Wet-gel Crystallization Route[J]. Chemical Research in Chinese Universities, 2017, 33(4): 520-524.

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High-efficient Synthesis of Zeolite LTA via a Wet-gel Crystallization Route

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