SEPARATION OF Ta AND Nb BY EXTRACTION WITH SEC-OCTANOL-HF-H2SO4 SYSTEM
来源期刊：中国有色金属学报(英文版)1996年第3期
论文作者：Chen Huifang He Wannian Zhang Yuqi
文章页码：40 - 43
Key words：sec-octanol; Ta; Nb; extraction
Abstract: Research work for the technology of separation of Ta and Nb with extraction by means of secondary octanol-HF-H2SO4 system has been conducted. When the material acidity was HF 4 mol/L and H2SO4 4mol/L, the distribution ratios of Ta and Nb were 15.0 and 3.2 correspondingly ,and Ta and Nb were extracted simultaneously into the organic phase; while at a lower acidity ,the sec-octanol system has a stronger extracting power for Ta than for Nb. When the material acidity was HF 1 mol/L and H2SO41.5 mol/L, the distribution ratios of Ta and Nb were 6.85 and 0.032 respectively, and the separation coefficient went up to 214,which resulted in a good separation of Ta and Nb.
