摘要
用盐酸对富含镧、铈等稀土离子的织金磷矿石进行酸解,以仲辛基苯氧基取代乙酸、环烷酸以及传统的酸性磷类萃取剂2-乙基己基膦酸单2-乙基己基酯和二-(2-乙基己基)磷酸酯为载体、山梨糖醇酐油酸酯和双烯基丁二酰亚胺作混合表面活性剂、磺化煤油作溶剂、盐酸作内相解析剂制成的乳状液膜来对磷矿酸解浸出液中镧、铈等稀土离子进行提取,考察了流动载体浓度、表面活性剂种类及浓度、内相酸浓度、水乳比、油内比对提取率的影响。结果表明:载体浓度为12%,混合表面活性剂浓度为8%,内相解析剂浓度为6 mol.L-1,乳水比为1∶10,油内比为1∶1时,稀土提取率可达76.46%。
Zhijin phosphate rock contained rich lan- thanum and cerium were dissolved by hydrochloric acid and extracted by liquid surfactant membranes. This liquid membrane system contained di（2-ethylhex- ly） phosphate, sec-octyl phenoxy acetic acid, naph- thenic acid and phosphonic acid （ 2-ethylhexly ） -mono （2-ethylhexly） ester as carriers, sorbitol anhydride o- leate and polyisocrotyl suceinimide as mixed surfac- tants, sulfonated kerosene as solvent and hydrochloric acid as strippant. The effects of carriers, surfactants, hydrochloric acid concentration, oil internal ratio and ratios of water to emulsion on recovery of rare earth ions were studied. The results showed that the optimal liq- uid membrane formulation was 12% cartier, 8% mixed surfactants, 6 mol.L-1 hydrochloric acid, ratios of wa- ter to emulsion 1：10 and oil internal ratio 1： 1. The ex- tracting rate of rare earth ions could be raised as high as 76.46% from the leaching solution of phosphate ore which contain 0.26 g·L-1 rare earth ions, and 90% impurities were still in the external aqueous phase.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2013年第3期269-274,共6页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金(51164004)资助
关键词
磷矿
乳状液膜
萃取
稀土
phosphate ore
liquid surfactant membrane
extraction
rare earths
