盐酸体系中萃取分离砷的研究
来源期刊:中南大学学报(自然科学版)1990年第6期
论文作者:廖平婴 尹周澜
文章页码:673 - 678
关键词:萃取; 分离; 砷
Key words:extraction; seperation; arsenic
摘 要:以TBP,D2EHDTPA及N235为萃取剂,对盐酸体系中含砷及其它金属离子的溶液进行萃取实验,选择了两种合适有机相组成:25%TBP+25%D2EHDTPA+50%磺化煤油及25%N235+50%磺化煤油+25%2-乙基己醇(反萃时加入),能使砷与其它金属离子分离。用选择的有机相对某生产实际溶液进行砷的分离实验,以达到消除污染及综合回收的目的。本文还用红外光谱法探讨了上述萃取剂萃取As(Ⅲ)及As(Ⅴ)的机理。
Abstract: Two proper extractants composed of 25%TBP+25%D2EHDTPA+50% kerosine and 25%N235+50% kerosine+25% 2-ethyl hexanol are proposed in order to separate arsenic from other co-existed metallic cations and reduce its pollution. The mechanism of the extraction of As(Ⅲ) and As(Ⅴ) by TBP and D2EHDTPA is also discussed based on the infrared spectra technique.