How to separate potassium nitrate and sodium nitrite?
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Our company has now eliminated a batch of molten salt, which mainly contains potassium nitrate and sodium nitrite. What is the use of this mixture or how to separate it?
It can be sold as waste to manufacturers in this field, or you can separate it yourself, mainly by using the difference in solubility of the two substances. However, if you calculate the cost, the profit may be average, so it is better to sell it directly. Of course, if the quantity is large, you can handle it yourself.
It can be separated by crystallization, but economic accounting must be considered. If necessary, we can work together.
The quantity is relatively large, more than 40 tons. We wanted to separate, but we also took into consideration economic benefits. Want to sell directly, but don’t know which users need it? Please advise, thank you!
Both are cheap, so don't sell them as fertilizers or pyrotechnic oxidizers.
sodium nitrate: 3000/ton potassium nitrate: 4000/ton 40 tons * 3500=140000, minus the expenses, the profit is not much.
After dissolving, add potassium chloride and use the solubility characteristics of sodium chloride to separate its crystals.
It can be separated by utilizing the characteristic that the solubility of potassium nitrate in water increases dramatically as the water temperature rises. However, potassium nitrate is a strong oxidant and can burn and explode when in contact with organic matter. Sodium nitrite is a strong oxidant and has reducing properties. It can also be oxidized when encountering strong oxidants. The two may interact with each other to produce high heat, causing the burning of combustibles. Be very careful if separated. In addition, when sodium nitrite meets acid, it can produce nitrous acid, which is unstable and will decompose into nitrogen oxide, which is toxic.