Method for improving yield of oxalic acid precipitation rare earth

The invention relates to the technical field of rare earth element extraction and separation, in particular to a method for improving the yield of oxalic acid precipitation rare earth. The invention discloses a method for improving the yield of oxalic acid precipitation rare earth. The solubility of rare earth oxalate is reduced by reducing the temperature of oxalic acid precipitation mother liquor and reducing the acidity of the oxalic acid precipitation mother liquor. The temperature of the oxalic acid precipitation mother liquor is 40-45 DEG C. The acidity of the oxalic acid precipitation mother liquor is controlled at the pH value of 2.0-2.5. The invention aims to improve the yield of oxalic acid precipitation rare earth series products. 本发明涉及稀土元素提取与分离技术领域，尤其涉及一种提高草酸沉淀稀土收率的方法。一种提高草酸沉淀稀土收率的方法，通过降低草酸沉淀母液温度，降低草酸沉淀母液酸度来降低稀土草酸盐的溶解度。所述草酸沉淀母液温度为40-45℃。所述草酸沉淀母液酸度控制在pH值为2.0-2.5。本发明的目的在于提高草酸沉淀稀土系列产品的收率。