Saltpeter: Difference between revisions
added some stuff on production methods, and an image of raw niter |
Added similar potassium carbonate reaction. Added bacterial oxidation production method. Added bat guano section. |
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=== Potassium Hydroxide & Nitric Acid === | === Potassium Hydroxide & Nitric Acid === | ||
Potassium hydroxide can be used to neutralize nitric acid, producing aqueous | [[Potassium hydroxide]] or [[potassium carbonate]] can be used to neutralize [[nitric acid]], producing aqueous potassium nitrate in the reactions shown below. Be sure to perform the reactions slowly and/or with temperature control, as it is highly exothermic. | ||
KOH + HNO<sub>3</sub> → KNO<sub>3</sub> + H<sub>2</sub>O | KOH + HNO<sub>3</sub> → KNO<sub>3</sub> + H<sub>2</sub>O | ||
K<sub>2</sub>CO<sub>3</sub> + 2 HNO<sub>3</sub> → 2 KNO<sub>3</sub> + H<sub>2</sub>O + CO<sub>2</sub> | |||
=== Bacterial Oxidation === | |||
Certain strains of aerobic bacteria are capable of oxidizing some nitrogen-containing molecules to nitrates. [[Urea]] (found in urine) and [[ammonia]] are common biological sources of oxidizable nitrogen. Historically, potassium nitrate was produced on scale in [[Niter bed|niter beds]] by using naturally occurring bacteria to oxidize nitrogen-rich animal waste into nitrates which were then recovered through [[solvent extraction]] and [[recrystallization]] with water and hardwood [[Wood ash|ash]]. Bacterial oxidation is the primary mechanism which forms natural deposits. | |||
=== Bat Guano === | |||
Bat guano is often rich in nitrates due to the bat's diet and bacterial oxidation. Nitrate can be extracted from bat guano in a similar manner to niter bed material. | |||
== Uses == | == Uses == | ||
Revision as of 18:52, 9 May 2025
Potassium nitrate, also known as saltpeter, is a chemical compound with the chemical formula KNO3. It is an ionic salt of potassium ions K+ and nitrate ions NO3−, and is therefore an alkali metal nitrate. It is a source of nitrogen and it occurs in nature as a mineral, niter.
Production
Mineral Sources
Saltpeter minerals can be found in collected mineral deposits, and purified into usable saltpeter
Potassium Hydroxide & Ammonium Nitrate
Potassium Hydroxide & Nitric Acid
Potassium hydroxide or potassium carbonate can be used to neutralize nitric acid, producing aqueous potassium nitrate in the reactions shown below. Be sure to perform the reactions slowly and/or with temperature control, as it is highly exothermic.
KOH + HNO3 → KNO3 + H2O
K2CO3 + 2 HNO3 → 2 KNO3 + H2O + CO2
Bacterial Oxidation
Certain strains of aerobic bacteria are capable of oxidizing some nitrogen-containing molecules to nitrates. Urea (found in urine) and ammonia are common biological sources of oxidizable nitrogen. Historically, potassium nitrate was produced on scale in niter beds by using naturally occurring bacteria to oxidize nitrogen-rich animal waste into nitrates which were then recovered through solvent extraction and recrystallization with water and hardwood ash. Bacterial oxidation is the primary mechanism which forms natural deposits.
Bat Guano
Bat guano is often rich in nitrates due to the bat's diet and bacterial oxidation. Nitrate can be extracted from bat guano in a similar manner to niter bed material.
Uses
Major uses of potassium nitrate are in fertilizers, tree stump removal, rocket propellants and fireworks, and it is one of the major components of gunpowder.
Dependencies
See also
References
| This article uses material from the Wikipedia article Potassium_nitrate, which is released under the Creative Commons Attribution-ShareAlike 3.0 Unported License (view authors). | 
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| This article uses material from the Wikipedia article Niter, which is released under the Creative Commons Attribution-ShareAlike 3.0 Unported License (view authors). |
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