Extract potassium nitrate from npk fertilizer

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SUMMARY

Extracting potassium nitrate from NPK fertilizer (20-20-20) is technically feasible but not practical. The discussion highlights that while the fertilizer contains nitrogen and potassium, it does not guarantee the presence of potassium nitrate. The consensus is that purchasing potassium nitrate directly is a more efficient solution than attempting extraction.

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Hello i have NPK fertilizer 20-20-20 and i want to extract potassium nitrate crystal from it is that possible and if so how can I do it??
 
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Why? Why not just buy some potassium nitrate? What's the application here?
 
Perhaps the OP intends to add some sulfur and charcoal...
Buying some compounds on a particular list is monitored, remember.
 
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Just because the fertilizer contains N and K doesn't necessarily mean it contains potassium nitrate.

Technically yes, it is doable. Practically it is much easier to buy the potassium nitrate itself.
 

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