硅酸盐学报2017，Vol.45Issue(8)：1183-1189,7.DOI:10.14062/j.issn.0454-5648.2017.08.18
方沸石水热制备白榴石
Preparation of Leucite from Analcime by Hydrothermal Method
摘要
Abstract
Leucite samples were prepared with analcime in K2CO3 solution by a hydrothermal method.Abundant K+ in leucite is beneficial to the application in agriculture as a slow-releasing fertilizer.The samples were characterized by X-ray diffraction,Fourier transform infrared spectrometry,flame photometry and scanning electron microscopy,respectively.The results show that more leucite phases appear in the samples when the temperature increases.The conversion rate of K+ increases as the reaction time increases from 1 h to 3 h.The content of K2O remains stable when the reaction time increases to 10 h.The maximum conversion rate ofK+ is 74.42％ when analcime reacts with 4 mol/L K2CO3 solution (KAlSi2Or/K2CO3 mole ratio=1.0:8.8) at 120 ℃ for 4 h.Based on the kinetic analysis by shrinking core model and the corresponding experiments,it is indicated the reaction rate could be controlled by product layer diffusion.关键词
方沸石/白榴石/水热法/转化率Key words
analcime/leucite/hydrothermal method/conversion rate分类
化学工程引用本文复制引用
常倩倩,马鸿文,刘昶江,原江燕..方沸石水热制备白榴石[J].硅酸盐学报,2017,45(8):1183-1189,7.基金项目
中央高校基本科研业务专项资金资助(2652016059). （2652016059）
