Abstract:Extraction resin was used to prepare high-purity neodymium chloride solution with single hydrochloric acid as desorption reagent. Adsorption, desorption and separation factor of CL-P507, CL-P204, 001×7, 001×8, D113, D900 and DH100 resin on RE3+ and Al3+ were studied. CL-P507 and DH100 were selected as separation resin and aluminum removal resin respectively. The single factor condition experiment shows that feeding method, feed liquor concentration, desorption acid concentration and column diameter ratio have no significant effect on rare earths purity of effluent solution. High feed concentration, high desorption acid concentration and low column diameter ratio can obtain high concentration of high-purity neodymium chloride solution. High-purity neodymium chloride solution (>99.999%) is prepared under the optimum conditions including positive adsorption feeding, feed concentration of liquor of 30.89 g/L, desorption acid concentration of 0.3 mol/L, and column diameter ratio of 20︰1. This preparation method does not use any delay ions, which avoids presence of non-rare earth impurities from source, and provides a technical reference for preparation of high-purity rare earths.