PROCESS FOR PREPARING FLUORINE-FREE CERIUM NITRATE

摘要

FIELD: technology of rare earth elements. SUBSTANCE: after ceriumis extracted with organic solvent from fluorine containing solution, acid nitrate solution is treated with reagent to pH of 3.0-5.2. The reagent is alkali metal or ammonium hydroxide or carbonate. Cerium hydroxide or carbonate is also used for treating nitrate solution. The result achieved comprises improving economic process parameters and increasing the degree of purification from fluorine. EFFECT: more efficient preparation process. 3 cl