Niobium, tantalum, and titanium fluoride solutions

被引：1
|
作者：
A. I. Nikolaev
N. V. Kirichenko
V. G. Maiorov
机构：
[1] Russian Academy of Sciences,Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center
来源：
Russian Journal of Inorganic Chemistry | 2009年 / 54卷
关键词：
Niobium; Tantalum; Niobium Oxide; Tantalum Oxide; High Dissolution Rate;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Parameters for the preparation of concentrated tantalum, niobium, and titanium fluoride solutions by dissolution of their oxides or hydroxides in hydrofluoric acid were studied. Anatase titania, niobium oxide, and tantalum oxide calcined to 900°C were found to have high dissolution rates. Solid phases separated upon the dissolution of niobium, tantalum, and titanium oxides in hydrofluoric acid were identified as NbO2F, TaO2F, Ta3O7F, and TiOF2. Niobium hydroxide dissolution in an autoclave at the atmospheric pressure gave various complex salts: NH4NbOF4 and (NH4)3Nb2OF11.
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页码：505 / 511
页数：6
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