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conferenceseries
.com
Volume 6, Issue 4 (Suppl)
J Material Sci Eng, an open access journal
ISSN: 2169-0022
Materials Congress 2017
June 12-14, 2017
June 12-14, 2017 Rome, Italy
Materials Science and Engineering
9
th
World Congress on
Preparation of leucite from analcime by ion exchange process: An experimental study
Qianqian Chang
China University of Geosciences, China
T
he preparation of leucite from K
+
/Na
+
ions exchange process of analcime in K
2
CO
3
solution was studied. Abundant K
+
in leucite
after exchange is beneficial for the application in agriculture as slow release fertilizers. This is a good method to translate non
water-soluble potassium resources into water-soluble potassium resources. It can solve the problem of the shortage of water-soluble
potassium resources. It is also a new and popular way for the preparation of slow release fertilizers. In this study, X-ray diffraction
(XRD), Fourier transformation infrared spectrometry (FTIR) and scanning electron microscopy (SEM) were utilized to characterize
the as-exchanged samples. Flame photometry was applied to determine the concentrations of potassium oxide. XRD data and FTIR
results determined that leucite was prepared from K
+
/Na
+
ions exchange process of analcime in K
2
CO
3
solution at 60ºC, 90ºC and
120ºC for 1 h, 2 h, 4 h, 6 h and 10 h. The crystal structure of analcime and leucite show that potassium atoms surrounded by six oxygen
atoms in leucite are located in the sites of water molecule in analcime. The preparation of leucite from analcime in K
2
CO
3
solution
is a reversible chemical reaction. The K
+
/Na
+
ions exchange was stabilization at higher temperatures (90ºC and 120ºC) and longer
time according to the K
2
O contents in samples. It turned out that the reaction rate was controlled by product layer diffusion from
the experiments and analysis of kinetics according to shrinking core model. It shows that the potassium oxide of samples maximum
is 17.10% (in theory is 21.58%) obtained from analcime reacted with 4 mol/L K
2
CO
3
solution (KAlSi
2
O
6
/K
2
CO
3
mole ratio=1:10) at
120ºC for 4 h.
Biography
Qianqian Chang is a Post-graduate student at the China University of Geosciences (Beijing) in Material Science and Engineering. Currently, she is working on the
preparation of leucite from analcime by ion exchange. Leucite processed in this method is used as a slow release potassium fertilizer. Preparation of leucite from
analcime by ion exchange of K
+
/Na
+
is significant for the application of analcime in fertilizers, which can not only supply the necessary potassium element to plants
and enhance dissolution of the rock phosphate, but also can reduce the loss of nutrients and water as well as the environmental pollutions compared to traditional
chemical fertilizers.
18910033083@163.comQianqian Chang, J Material Sci Eng 2017, 6:4(Suppl)
DOI: 10.4172/2169-0022-C1-068