Hydrothermal conversion of chrysotile to amorphous silica or brucite

被引：3
|
作者：
Kumada, Nobuhiro [1 ]
Yonesaki, Yoshinori [1 ]
Takei, Takahiro [1 ]
Kinomura, Nobukazu [1 ]
Kobayashi, Masaki [2 ]
Horiguchi, Hirokuni [2 ]
机构：
[1] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Dept Res, Yamanashi 4008511, Japan
[2] Asktechnica Co Ltd, Ichikawamisato, Yamanashi 4093601, Japan
来源：
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2009年 / 117卷 / 1371期
关键词：
Chrysotile; Asbestos; Hydrothermal reaction; POROUS SILICA;
D O I：
10.2109/jcersj2.117.1240
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Chrysotile (Mg3Si2O5(OH)(4)) was treated hydrothermally in acid or alkaline hydroxide solution. By hydrothermal treatment in 1M HCl, HNO3 or H2SO4 solution at 180 degrees C for 48 h chrysotile changed to amorphous silica by complete extraction of magnesium component and its fibrous morphology was held in spite of changing chemical composition. The maximum specific surface area (S-BET) of the fiberous amorphous silica was 127 m(2)/g. It was converted to Mg(OH)(2) by complete dissolution removal of silica component in 20 M NaOH or KOH solution at 180 degrees C for 48 h and the fiberous morphology of chrysotile disappeared. (C) 2009 The Ceramic Society of Japan. All rights reserved.
引用
收藏
页码：1240 / 1242
页数：3
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