Extraction and recovery of cerium（Ⅳ） and thorium（Ⅳ） from sulphate medium by an α-aminophosphonate extractant
来源期刊：JOURNAL OF RARE EARTHS2017年第1期
论文作者：卢有彩 张志峰 李艳玲 廖伍平
文章页码：34 - 40
摘 要：In the present work, a novel α-aminophosphonate extractant（Cextrant 230） was synthesized for the extraction and recovery of cerium and thorium from sulphate medium. The introduction of amine group into the phosphate molecule would enhance the extraction of Ce（Ⅳ） and Th（Ⅳ）. The effects of extractant concentration, H2SO4 concentration and temperature on the metal extraction were investigated in detail. It was found that the extraction of Ce（Ⅳ）, Th（Ⅳ） and REs（La, Gd, Yb） in sulphate medium decreased in the following order: Ce（Ⅳ）>Th（Ⅳ）>REs（Ⅲ）. A solvent extraction process to extract and recover cerium and thorium from bastnasite leaching was proposed, in which the purities of cerium and thorium products reached 99.9% and 99% with yield of 92% and 98%, respectively.
卢有彩1,2，张志峰1，李艳玲1，廖伍平1
1. State Key Laboratory of Rare Earth Resource Utilization,ERC for the Separation and Purification of REs and Thorium,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences2. University of Chinese Academy of Sciences
摘 要：In the present work, a novel α-aminophosphonate extractant（Cextrant 230） was synthesized for the extraction and recovery of cerium and thorium from sulphate medium. The introduction of amine group into the phosphate molecule would enhance the extraction of Ce（Ⅳ） and Th（Ⅳ）. The effects of extractant concentration, H2SO4 concentration and temperature on the metal extraction were investigated in detail. It was found that the extraction of Ce（Ⅳ）, Th（Ⅳ） and REs（La, Gd, Yb） in sulphate medium decreased in the following order: Ce（Ⅳ）>Th（Ⅳ）>REs（Ⅲ）. A solvent extraction process to extract and recover cerium and thorium from bastnasite leaching was proposed, in which the purities of cerium and thorium products reached 99.9% and 99% with yield of 92% and 98%, respectively.
关键词：
