离子交换树脂去除氯化铝溶液中铁和镓工艺研究

Study on removal of iron and gallium from aluminum chloride solution by ion exchange resin

本文采用离子交换树脂去除“一步酸溶法”提取氧化铝工艺中氯化铝溶出液的铁和镓杂质,考察了四种离子交换树脂去除杂质的能力。试验表明,D201MBP型离子交换树脂的杂质吸附率最高,最佳反应条件为树脂和溶出液质量比为1:10,反应温度70℃,反应时间30min,溶出液浓度1~1.2(原溶出液浓度设为1),Fe和Ga的吸附率可达93%和98%,且Al的损失率仅为3.9%。在室温下,用0.5%盐酸溶液洗脱饱和树脂,可达到良好的再生效果。

In this paper,iron and gallium impurities in aluminum chloride leaching solution were removed by ion exchange resins in the“one-step acid dissolution”process of extracting aluminum oxide.The ability of four ion exchange resins to remove impurities was investigated.The test shows that,D201MBP ion exchange resin has the highest impurity adsorption rate.The optimal reaction conditions are as follows:the mass ratio of resin and dissolved solution is 1:10,the reaction temperature is 70℃,the reaction time is 30min,Dissolution solution concentration 1~1.2(the original dissolution solution concentration is set to 1)The adsorption rate of Fe and Ga can reach 93%and 98%,and the loss rate of Al is only 3.9%.At room temperature,the saturated resin was eluted with 0.5%hydrochloric acid solution,and a good regeneration effect was achieved.