In some specific cases, sodium nitrate is a colorless transparent or white micro yellow diamond crystal, which tastes bitter and salty. In the production process, many chemical reactions will be used, so some impurities like silicon may remain in it. The desilication techniques are as follows:

1. Prepare the mixed solution of ammonia water and ammonium fluoride, add sodium nitrate into the mixed solution, with high silicon content and water content, ensure that the remaining ammonia in the added solution is about 1%, filter and separate out silicic acid.

2. After the mother liquor of ammonium fluoride is obtained, it is concentrated and dried to obtain ammonium fluoride, which is then introduced into anhydrous hydrogen fluoride to produce ammonium hydrogen fluoride. So far, the desilication of sodium nitrate has been completed and can be used.

After desilication, sodium nitrate can be put into use. Pay attention to its desilication skills. It is a dangerous chemical. When using it, please be careful to avoid problems.