| 简介 |
Solutions of rare-earth organophosphates in an organic solvent are prepared by reacting, in such solvent, a rare-earth compound selected from among the rare-earth oxides, hydroxides, carbonates and hydroxycarbonates with an organophosphorus acid and in the presence of a reaction promoter selected from among water, nitric, hydrochloric, acetic, formic and propionic acids and the rare-earth salts of these acids; utilizing a reaction promoter simplifies the method, reduces the reaction time and provides a solution in which the residual solids content may be low. |
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