Optimization of a single step method for synthesize of zeolite A from natural clinoptilolite and industrial grade chemicals
Publish place: Iran International Zeolite Conference
Publish Year: 1387
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ZEOLITE01_020
تاریخ نمایه سازی: 30 دی 1387
Abstract:
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.
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Authors
Hossein Kazemian
a. R&D Lab. Of SPAG Co., Technology incubator, Sci & Technol. Park of Tehran University, Tehran, Iran, and NSTRI, P.O.B.: ۱۱۳۶۵-۳۴۸۶., 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.: ۱۱۳۶۵-۳۴۸۶., Tehran – Iran
masoud kazemi
Department of Chemistry, Amir Kabir University.(Tehran Polytechnics ), Tehran, IRAN
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