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在原有工作的基础上,根据稀土、铀、钍和锆(铪)-PMBP螯合物的萃取曲线,我们开展了矿石中少量稀土、铀、钍和锆(铪)的PMBP连续萃取分离测定试验。为了能一次萃取,分别连续反萃取,并能有效和快速的去除磷酸根的干扰,我们采用在强碱性溶液中,先以钙为载体,加入过氧化氢使铀、稀土、钍和锆(铪)定量沉淀,然后在4N盐酸介质中,加PMBP使与稀土、铀、钍、锆(铪)生成螯合物,再调pH至5.3-5.5,加苯萃取。苯层相继以pH2.4甲酸反萃稀土,
Based on the previous work, according to the extraction curves of rare earth, uranium, thorium and zirconium (hafnium) -PMBP chelate, we carried out the PMBP continuous extraction and separation test of a small amount of rare earth, uranium, thorium and zirconium . In order to be able to extract once, respectively, continuous stripping, and can effectively and quickly remove the interference of phosphate, we use a strong alkaline solution, first calcium as a carrier, adding hydrogen peroxide so that uranium, rare earth, thorium and zirconium Hafnium) quantitative precipitation, and then in 4N hydrochloric acid medium, add PMBP with rare earth, uranium, thorium, zirconium (hafnium) chelate formation, and then adjusted to pH 5.3-5.5, benzene extraction. The benzene layer was pH2.4 formate extract the rare earth,