반응이 완료된 후, 반응 용기 내 용액의 온도가 70°C가 될 때까지 방랭하여 0.45 µm 여과지를 가지고 고체를 여과하였다.
Following the effect was finished, the solution ended up being left to cool until the temperature for the solution in the reaction vessel reached 70 °C, and also the solid was filtered with 0.45 µm filter paper.