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Synthesis of NaY Zeolite from Kaolin and Diatomite…
Author:CHENGYuankun1 QIANDong1 ZHENGShuqin2 YAOHua3 TANGKewen2 
Unit:1. College of Chemistry and Chemical Engineering  Central South University  Changsha 410083  China  2. Department of 
Keyword:kaolin  diatomite  in-situ crystallization  zeolite 
Year,volume(Issue):page number:2012,40(8):1204-1209

Abstract: The microporous NaY zeolite was synthesized through in-situ crystallization using kaolin and diatomite in different proportions. The synthesized samples were characterized by X-ray diffraction, scanning electron microscope and N2 adsorption-desorption, respectively. The effect of different n(SiO2):n(Al2O3)(mole ratio), n(Na2O):n(SiO2) and n(H2O):n(Na2O) on the relative crystallinity of the NaY zeolite was investigated when m(kaolin):m(diatomite)(mass ratio) was 6:4 and 2:8. The results show that when m(kaolin):m(diatomite) is 6:4, the relative crystallinity of NaY zeolite firstly increases and then decreases with the increase of the n(SiO2):n(Al2O3). The increase of the n(Na2O):n(SiO2) and the decrease of n(H2O):n(Na2O) in the reaction system could favor the formation of NaY zeolite. When m(kaolin):m(diatomite) is 2:8, the relative crystallinity of NaY zeolite firstly increases and then decreases with increasing the n(SiO2):n(Al2O3). However, the relative crystallinity of NaY zeolite decreases with increasing the n(Na2O):n(SiO2) and decreasing the n(H2O):n(Na2O).

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Foundation item:
国家自然科学基金(20871045);湖南省自然科学基金(11JJ- 2008);博士后基金(20110491240);湖南省科技计划重点资助项目(2010GK2020)。
About The Author:
第一作者:程远坤(1986—),男,硕士研究生。 通信作者:钱 东(1967—),男,博士,教授。
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