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Method for preparing potassium nitrate and ammonia chloride by double decomposition

A double decomposition method and ammonium nitrate technology, applied in the field of preparing potassium nitrate crystals and ammonium chloride crystals, can solve the problems of uncommon engineering applications

Active Publication Date: 2007-01-10
四川米高化肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main deficiency of adopting the evaporation method in the above patents is: it is not universal in engineering application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: Potassium nitrate crystals and ammonium chloride crystals were prepared by double decomposition method using potassium chloride and ammonium nitrate as raw materials. In the process cycle, potassium nitrate mother liquor is mixed with ammonium nitrate, and the composition of the mixture is shown in the table.

[0011] composition

[0012] When the evaporation temperature is 100°C, the evaporation pressure is about 540mmHg column, and the specific gravity of the evaporation solution is about 1.36.

Embodiment 2

[0013] Embodiment 2: In embodiment 1, when the evaporation temperature is 105° C., the evaporation pressure is about 630 mmHg column, and the specific gravity of the evaporation solution is about 1.37.

Embodiment 3

[0014] Embodiment 3: In embodiment 1, when the evaporation temperature is 110° C., the evaporation pressure is about 725 mmHg column, and the specific gravity of the evaporation solution is about 1.38.

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PUM

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Abstract

This invention relates to a method for preparing KNO3 and NH4Cl taking KCl and NH4NO3 as the raw materials and applying a de-analyzing method, in which, in the mixed solution of KNO3 mother solution and NH4NO3, evaporation of water and crystallization of NH4Cl are finished in the process of evaporation and crystallization, the mixed solution is evaporated in a continuous evaporator under 100-120deg.C and evaporation pressure of 540-935mmHg.

Description

technical field [0001] The invention relates to a method for preparing potassium nitrate crystals and ammonium chloride crystals by using potassium chloride and ammonium nitrate as raw materials through double decomposition. Background technique [0002] Potassium nitrate and ammonium chloride are of significant value to crops as fertilizers. Ammonium chloride is a quick-acting nitrogen fertilizer, which is widely used in paddy fields as a single application or as a nitrogen nutrient of low-concentration NPK compound fertilizer. Potassium-containing ammonium chloride fertilizer is more efficient. Potassium nitrate, as a new type of nitrogen-potassium compound fertilizer, has excellent nutritional characteristics and is recognized as the most ideal fertilizer for tobacco, vegetables and flowers so far. At the same time, it is the most ideal "quality element" for crops such as sugar crops, oil crops, starch, fiber, leaves, and beans. [0003] U.S. Patent No. 3,595,609 (pate...

Claims

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Application Information

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IPC IPC(8): C01C1/16C01D9/10
Inventor 刘国才王建军胡元刚赖致知郑勤学张国金林振清
Owner 四川米高化肥有限公司
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