A kind of preparation method of potassium nitrate

Abstract

The invention discloses a preparation method of potassium nitrate. The preparation method includes the step of mixing of raw materials, to be specific, mixing raw materials, namely ammonium nitrate and potassium chloride, with water proportionally while dissolving the raw materials to obtain a solution, and adding emulsified potassium chloride into the solution at a certain temperature when dissolved potassium chloride is saturated. By the preparation method which is a way of offsetting one's weakness, potassium ion and nitrate ion in the solution of the raw materials are in balanced matching to the utmost extent; the output rate of potassium nitrate is high, energy consumption and production cost are reduced relatively, and production efficiency is increased.

Description

technical field [0001] The invention relates to a preparation method of potassium nitrate. Background technique [0002] In the large-scale industrial production of potassium nitrate, on the basis of the quality of potassium nitrate products, increasing the yield is one of the key ways to reduce production costs and improve production efficiency. In the experiment of preparing potassium nitrate by conversion method, the yield is mainly related to the amount of evaporated water and the reaction temperature. When the amount of evaporated water is at an appropriate value, the yield is higher. The natural cooling of the standing solution is conducive to the formation of large grains of potassium nitrate, which increases the yield. Increase, but chlorine gas is produced during the reaction process, which pollutes the environment. The orthogonal design method optimizes the experimental scheme and conditions for the conversion method to prepare potassium nitrate, and conducts KNO ...

AI Technical Summary

Problems solved by technology

In the experiment of preparing potassium nitrate by conversion method, the yield is mainly related to the amount of evaporated water and the reaction temperature. When the amount of evaporated water is at an appropriate value, the yield is higher. The natural cooling of the standing solution is conducive to the formation of large grains of potassium nitrate, which increases the yield. increase, but chlorine gas is produced during the reaction, which pollutes the environment

The orthogonal design method optimizes the experimental scheme and conditions for the conversion method to prepare potassium nitrate, and conducts KNO from the factors of material ratio, water evaporation and cooling crystallization temperature. 3 Optimization of preparation conditions, under a corresponding material ratio, water evaporation and cooling crystallization temperature, the yield and purity of potassium nitrate are significantly improved, but this method introduces impurity sodium ions, and the process conditions require high

And the existing relatively common double decomposition method is produced in potassium nitrate production process, because the solubility difference of potassium chloride and ammonium nitrate is bigger, causes its potassium ion and nitrate ion to be unbalanced in the batching process, K in the solution + with NO 3 - Extremely mismatched, causing the potassium nitrate output rate to fail to increase

And the problem that the productive rate that this production method exists in this field is low, can't be solved for a long time, that is to say, existing traditional double decomposition method produces potassium nitrate production technique for improving productive rate, and its technology has developed to a bottleneck