Preparation method of industrial high-grade pure potassium nitrate

A preparation process, the technology of potassium nitrate, applied in the field of preparation of industrialized superior pure potassium nitrate, can solve the problems that cannot be directly applied to industrialized production, the process steps are complicated, and the production efficiency is low, so as to shorten the preparation cost and cycle, and optimize the purification Efficiency, the effect of large product output

Inactive Publication Date: 2018-05-29
山西同杰化学试剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the deficiencies of patent 201410288564.X are: (1) only laboratory production, can not be directly applied to industrial production; (2), the whole production process needs more than seven hours, production efficiency is low, because the heating temperature is too high (3) After the introduction of potassium carbonate, it is necessary to ...

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  • Preparation method of industrial high-grade pure potassium nitrate

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Effect test

Embodiment 1

[0019] Embodiment 1, a kind of preparation technology of industrialized superior grade pure potassium nitrate, the steps are as follows:

[0020] (1) Preparation of purified potassium nitrate aqueous solution

[0021] Pour quantitative deionized water into the potassium nitrate reaction kettle, then turn on the potassium nitrate reaction kettle to stir, after stirring for 2-5 minutes, open the jacketed steam valve of the potassium nitrate reaction kettle to heat, and add deionized water from the feeding hole while heating. The industrial potassium nitrate of 1-1.5 times the water quality, when the temperature of the solution rises to 60-80 ° C, the potassium hydroxide solution with a mass fraction of 20-40% prepared by pure potassium hydroxide is used to adjust the pH of the solution in the potassium nitrate reactor The value is 8.0-8.5, then turn on the discharge pump and related valves, so that the hot solution with a temperature of 60-80 ° C is first filtered through an ult...

Embodiment 2

[0026] Embodiment 2, a kind of preparation technology of industrialized superior grade pure potassium nitrate, the steps are as follows:

[0027] (1) Preparation of purified potassium nitrate aqueous solution

[0028] Pour 100L of deionized water into a 300L potassium nitrate reactor, and then turn on the potassium nitrate reactor to stir. After stirring for 2-5 minutes, open the jacketed steam valve of the potassium nitrate reactor for heating. Add 100Kg of industrial potassium nitrate, when the temperature of the solution rises to 60°C, adjust the pH value of the solution in the potassium nitrate reactor to 8.0 with a potassium hydroxide solution with a mass fraction of 20% prepared by superior pure potassium hydroxide, and then open Discharge pump and related valves, so that the hot solution with a temperature of 60 ° C is first filtered through an ultra-micro filter with a pore size of 0.2 μm, and then enters the flash concentration tank with a mass fraction of 20% prepare...

Embodiment 3

[0031] Embodiment 3, a kind of preparation technology of industrialized superior grade pure potassium nitrate, the steps are as follows:

[0032] (1) preparation of potassium nitrate aqueous solution

[0033] Pour 150L of deionized water into a 500L potassium nitrate reactor, and then turn on the potassium nitrate reactor to stir. After stirring for 2-5 minutes, turn on the jacketed steam valve of the potassium nitrate reactor for heating. Add 220Kg of industrial potassium nitrate, when the temperature of the solution rises to 80°C, adjust the pH value of the solution in the potassium nitrate reactor to 8.5 with a potassium hydroxide solution with a mass fraction of 40% prepared by superior pure potassium hydroxide, and then open The discharge pump and related valves, so that the hot solution with a temperature of 80 ° C is first filtered through an ultra-micro filter with a pore size of 1 μm, and then enters the flash concentration tank with a dilute solution with a mass frac...

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Abstract

The invention discloses a preparation method of industrial high-grade pure potassium nitrate and belongs to the field of inorganic synthesis. The preparation method comprises (1) purified potassium nitrate aqueous solution preparation: adding deionized water and industrial potassium nitrate into a potassium nitrate reactor, heating the mixture to 60-80 DEG C, adjusting solution pH to 8.0-8.5 through a potassium hydroxide solution, filtering the solution through an ultra-micro filter with pore diameters of 0.2-1 micrometer, feeding the filtrate into a flash distillation concentration reactor, and adjusting solution pH of the filtrate to 6.5-7 through dilute nitric acid so that a purified potassium nitrate aqueous solution is obtained, and 2) high-grade pure potassium nitrate preparation: concentrating the purified potassium nitrate aqueous solution, putting the concentrate into a centrifugal machine, carrying out solid-liquid separation to obtain potassium nitrate crystals, putting thepotassium nitrate crystals into a vacuum drier and carrying out drying for 1-2h to obtain the superior grade pure potassium nitrate finished product. The preparation method of the industrial high-grade pure potassium nitrate has simple processes, high production efficiency, low impurity content and high purity.

Description

technical field [0001] The invention belongs to the field of inorganic synthesis, and in particular relates to a preparation process of industrialized superior grade pure potassium nitrate. Background technique [0002] Potassium nitrate is an inorganic chemical product with a wide range of uses. It is a chlorine-free high-quality fertilizer in agriculture. It is widely used in gunpowder, fireworks, metal welding aids, ammonia synthesis catalysts, ceramics, etc. in industry. It is used in food. Used as coloring agent and preservative for meat products; used as diuretic, cooling agent and raw material for the production of penicillin potassium salt, rifampin and other drugs in medicine; in terms of optical glass products, it is used for the production of high-end mobile phone screens and tablet computer displays Raw material for chemically strengthened glass. [0003] At present, the main processes for producing potassium nitrate at home and abroad include sodium nitrate and...

Claims

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Application Information

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IPC IPC(8): C01D9/16C01D9/04
CPCC01D9/16C01D9/04C01P2006/80
Inventor 高同杰司林杰李迎辉肖克强白杨
Owner 山西同杰化学试剂有限公司
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