Preparation and dehydration behaviour of thomsonite with ideal chemical composition |
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| Authors: | A Yamazaki Y Inoue M Koike T Sakamoto R Otsuka |
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| Institution: | (1) Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-Ku, 169 Tokyo, Japan;(2) Faculty of Liberal Arts and Science, Okayma University of Science, 1-1 Ridai-cho, 700 Okayama City, Okayama Pref., Japan |
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| Abstract: | Thomsonite with ideal chemical composition and with an ordered framework structure was synthesised hydrothermally from zeolite Na?A, which was ground to X-ray amorphous, with 0.05 mol dm?3 CaCl2 solution at 200°C. The dehydration behaviour of the prepared thomsonite was examined by TG-DTA. It was revealed that thomsonite lost most of zeolitic water below 450°C in three steps at about 180°, 340° and 390°C. The peak profiles of, the two higher-temperature endotherms were sharp and similar, and the weight loss at each step was approximately equal. |
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| Keywords: | dehydration and preparation of thomsonite 29Si and27Al NMR TG-DTA |
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