سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۷

نویسنده(ها):

Hossein Kazemian – a. R&D Lab. Of SPAG Co., Technology incubator, Sci & Technol. Park of Tehran University, Tehran, Iran, and NSTRI, P.O.B.: 11365-3486., Tehran – Iran
farshid farhadi – a. R&D Lab. Of SPAG Co., Technology incubator, Sci & Technol. Park of Tehran University, Tehran, Iran, and NSTRI, P.O.B.: 11365-3486., Tehran – Iran
masoud kazemi – Department of Chemistry, Amir Kabir University.(Tehran Polytechnics ), Tehran, IRAN

چکیده:

A powdered natural clinoptilolite-rich tuff was converted to synthetic zeolite A under a hydrothermal
condition by addition of appropriate amounts of industrial grade sodium hydroxide and sodium aluminate.
Effect of different parameters like as temperature, sodium hydroxide concentration, solid/liquid (S/L) ratio
(the ratio of weight of clinoptilolite; g; to the volume of sodium hydroxide solution; ml,), and contact time on
the final product were investigated. The formation of zeolite A was ascertained by X-ray powder diffraction
(XRD) and X-ray florescence (XRF) techniques. According to the results obtained of characterization tests
as well as reaction yield evaluation, it is concluded that: temperature of 80 ºC, sodium hydroxide
concentration of 2N, reaction time of 4 hours, and S/L ratio of 1/18 were the optimized condition to convert
the used natural clinoptilolite to zeolite A with highest phase purity and higher production yield.