Patent
Process for preparing potassium nitrate by metathesis method
TLDR
In this article, a cyclic metallesis reaction is used to prepare the initial raw reaction liquid with common saturation point with ammonium nitrate, potassium chloride and water, adidng fresh water and potassium chloride, separating solid potassium nitrate to obtain the first-stage mother liquid, heating, adding ammonium ionate, negative-pressure evaporation to separate solid ammonium chloride, returning the second-stage mixtures, and repeating said steps.Abstract:
A process for preparing potassium nitrate by metallesis reaction is a cyclic reaction procedure, and includes preparing the initial raw reaction liquid with common saturation point with ammonium nitrate, potassium chloride and water, adidng fresh water and potassium chloride, separating solid potassium nitrate to obtain the first-stage mother liquid, heating, adding ammonium nitrate, negative-pressure evaporation to separate solid ammonium chloride, returning the second-stage mother liquid back to the crystallizing procedure of potassium nitrate, and repeating said steps. Its advantages are low energy consumption, low requirement for purity of raw material, low cost and simple process.read more
Citations
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Process for preparing potassium nitrate by double decomposition method
TL;DR: In this paper, a metathesis method for preparation of potassium nitrate was proposed, where raw potassium chloride, ammonium nitrate and craft water finish their preparation at a certain ratio, they are input into vacuum cooling crystallizer.
Patent
Continuous system and method for producing potassium nitrate through double decomposition method
TL;DR: In this paper, a double decomposition method was used to produce a continuous system and method for producing potassium nitrate through a double-decomposition method, which consisted of a dissolving tank, a vacuum crystallization device, a primary thickener and a primary centrifuge, a material mixing tank and a concentrating preheating device.
Patent
Continuous triple-effect falling-film concentration and vacuum crystallization system and method in potassium nitrate production through double-decomposition method
TL;DR: In this article, a triple-effect falling-film concentration and vacuum crystallization system and a method in potassium nitrate production through doubledecomposition method is proposed. But the method is not suitable for large-scale and continuous production.
Patent
Method for preparing potassium sulfate by double-decomposition closed-cycle process
TL;DR: In this article, a double-decomposition closed-cycle process was proposed for the preparation of ammonium sulfate by adding a hot potassium chloride solution into an ammonium-sulfate solution, cooling a reacted solution, carrying out solid-liquid separation, and further refining on crude solid potassium sulfate.
References
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