Difference controllable potassium nitrate crystal synthesis method based on cold shock mode

A technology of potassium nitrate and crystal, which is applied in the field of potassium nitrate crystallization, can solve the problems of poor crystal dispersibility, and achieve the effects of low cost, saving exploration cost, and easy large-scale production

Pending Publication Date: 2020-02-21
QILU NORMAL UNIV
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Problems solved by technology

Another 32mL of hot distilled water was added to the suction filter bottle to redissolve the crystals, and the solution was transferred to a beaker and heated slowly until it evaporated to 3 / 4 of the original volume. However, the inventor found that: under the traditional cooling crystallization conditions The obtained crystals are often fine powder particles (such as Figure 5 shown), and the dispersion of crystals is poor

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  • Difference controllable potassium nitrate crystal synthesis method based on cold shock mode
  • Difference controllable potassium nitrate crystal synthesis method based on cold shock mode
  • Difference controllable potassium nitrate crystal synthesis method based on cold shock mode

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Embodiment 1

[0049] A kind of potassium nitrate crystallization method based on temperature gradient, comprising:

[0050] First add 8.5g NaNO to a 500mL beaker 3 And 7.5gKCl, then add 60mL distilled water. Put the beaker on the asbestos net, heat and stir with low heat to dissolve it, and then continue to heat and evaporate to 2 / 3 of the original volume. At this time, more crystals begin to precipitate in the beaker. Filtrate under reduced pressure while hot, and crystals appear in the filtrate soon. Take another 32mL of hot distilled water and add it to the suction filter bottle to redissolve the crystals, transfer the solution to a beaker and heat it slowly until it evaporates to 3 / 4 of the original volume, then add 20ml of absolute ethanol to divide the solution into 4 servings, crystals obtained with 4 cooling methods:

[0051] 1. Potassium nitrate crystals were prepared in an ice-water bath at 0°C, figure 1 . There are many crystal seeds, and the crystal size is small and irreg...

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Abstract

The invention relates to a difference controllable potassium nitrate crystal synthesis method based on a cold shock mode, the difference controllable potassium nitrate crystal synthesis method is a potassium nitrate crystallization method based on temperature gradient intervention, potassium nitrate is used as a widely applied chemical raw material, and in order to obtain better crystal size, morphology and quality, the existing method is mainly improved from the aspects of crystallization process condition optimization and crystal growth kinetics. The improved methods require strict control of experimental conditions, are complex in principle and process, and are not beneficial to large-scale popularization. Therefore, a crystallization improvement method based on temperature gradient intervention is provided, solid-liquid separation is performed, and refined potassium nitrate crystals are prepared. The method is easy and fast to implement, and a good crystallization effect is obtained. Factory production can select suitable production conditions according to own needs.

Description

technical field [0001] The invention belongs to the technical field of potassium nitrate crystallization, and in particular relates to a method for crystallizing potassium nitrate based on temperature intervention. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] As an important chemical raw material, potassium nitrate is widely used in industrial and agricultural production. At present, the potassium nitrate crystals on the Chinese market are mainly prepared by cooling crystallization, and the quality of the products varies, and there are common problems of small crystal particle size and poor crystal form. According to many literature reports, the crystal form of potass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D9/14C01D9/18
CPCC01D9/14C01D9/18
Inventor 李梦华刘国鹏
Owner QILU NORMAL UNIV
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