| 简介 |
The present invention relates to a method of recovering europium from a rare earth compound, including the steps of leaching the rare earth compound to obtain a leached liquid; reducing europium from the rare earth compound liquid using metal powder under an acid condition and non-oxidizing atmosphere; precipitating the europium using an acid to convert to a carbonate for leaching; repeating the reducing step and the precipitating step once, twice, or three times; and precipitating the leached material and burning to obtain Eu oxide.(AA, KK) Leaching(BB) (SEG) CL3 solution (1)(CC) Adjusted to pH 3.0(DD) Zn powder(EE) Zn reduction (using column)(FF) H2SO4 (2 weight)(GG, LL) Deposition(HH) Ar atmosphere(II) EuSO_4 (precipitate)(JJ) Converted to carbonate(MM) Calcinating(NN) First purification process(OO) Second purification processCOPYRIGHT KIPO 2014 |
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