METHOD FOR PRODUCING AN ORGANIC PHASE COMPOSITION FOR USE IN SOLVENT EXTRACTION OF WATER PHASE RARE EARTH METALS

摘要

method for synthesizing rare earth metal puller. The present invention relates to a rare earth metal extractor containing, as the extractor component, dialkyl diglycol acid which is excellent in the disruption of light rare earth elements is reacted in diglycolic acid (x mol) and an esterifying agent (y mol) at a reaction temperature of 70 ° C or more and for a reaction time of one hour or more such that the molar ratio of y / x is 2.5 or more, and is subjected to vacuum concentration. subsequently, a reaction intermediate is obtained by removing unreacted products and reaction residues. then a nonpolar solvent or low polarity solvent which is an organic solvent to form an organic phase during solvent extraction of rare earth metals and which is capable of dissolving dialkyl diglycol amide acid is added as a reaction solvent, and a product The reaction intermediate is reacted with dialkyl amine (z mol) so that the molar ratio of z / x is 0.9 or more. As a consequence, a rare earth metal extractor is efficiently synthesized at low cost and in high yield without having to use the uneconomical anhydride diglycolic acid and harmful dichloromethane.