Tungsten-molybdenum separation method

The invention discloses a tungsten-molybdenum separation method. The method comprises the following steps that acid is added into a high-concentration tungsten-molybdenum solution, and the pH is adjusted to 6-9; then ammonium salt is added for stirring; the stirred mixture is left to stand at room temperature after the dissolution is completed; filtering is carried out to obtain ammonium paratungstate sodium compound salt precipitate, acid is added, and filtration is carried out to obtain tungstic acid; and a mother liquor of the ammonium paratungstate sodium compound salt precipitate is an ammonium molybdate solution, and ammonium tetramolybdate is obtained through acid precipitation. The method is simple and convenient to operate, the generated ammonium-sodium compound salt precipitate is simple and convenient in treatment, and can be converted into a tungstic acid product by adopting normal-temperature acid regulation. The tungsten-molybdenum separation effect is good, the tungsten-molybdenum mass ratio of