A novel process of extraction and separation of
RE and Mn from Panxirare earth mud
RE and Mn from Panxirare earth mud
(1.Institute of Nuclear Energy Technology,Tsinghua University,
Beijing 102201, China；
2.Institute of Applied Chemistry,
Jiangxi Academy of Sciences,Nanchang 330029,China)
Beijing 102201, China；
2.Institute of Applied Chemistry,
Jiangxi Academy of Sciences,Nanchang 330029,China)
Abstract: A novel process to extract and separate rare earth (RE) and manganese (Mn) from Panxi rare earth mud was developed. The process involves roasting the mud at 480℃ with NH4Cl as chlorinating agent, and leaching the calcine with hot water to obtain a rare earth chloride solution. After the solution was further purified,HD(DIBM)P (P507) was applied as extractant to separate RE and Mn.By seven stages of fractional extraction,the RECl3 and MnCl2 solutions with 99.8% purity were obtained.Finally,the purified RECl3 and MnCl2 solution were precipitated by NH4HCO3 to obtain a crystal RE2(CO3)3 and MnCO3 products respectively.
Key words: rare earth mud;extraction and separation;Mn and RE