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Production process of potassium fluoride

A production process, potassium fluoride technology, applied in the direction of alkali metal fluoride, calcium/strontium/barium halide, calcium/strontium/barium chloride, etc., can solve the problem that anhydrous hydrogen fluoride is expensive, unfavorable for large-scale production and application, Large raw material cost and other issues

Inactive Publication Date: 2020-01-17
JIANGXI QUCHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of anhydrous hydrogen fluoride is relatively expensive. If large-scale production is carried out in industry, it will cause a large cost of raw materials, which is not conducive to large-scale production and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] S1. Put 200kg of water into the reaction kettle, start stirring, put in 148kg of calcium hydroxide, and beat into calcium hydroxide slurry;

[0031] S2. Put 200kg of water into the reaction kettle, start stirring, put in 220kg of potassium fluorosilicate, and beat it into a potassium fluorosilicate slurry; slowly pump the calcium hydroxide slurry into the potassium fluorosilicate slurry, fully react, and reach the end of the reaction The PH value is 8.5;

[0032] S3. After the reaction in the reactor is complete, the reaction liquid is separated from solid and liquid, and the solid is beaten into a potassium fluorosilicate synthesis process;

[0033] S4, the clear liquid is left to stand for 12 hours and then enters the concentration kettle.

[0034] S5. Pour the concentrated potassium fluoride mother liquor into the tank to be sprayed, and then put the concentrated potassium fluoride mother liquor into the spray drying tower for spray drying, and the finished product ...

Embodiment 2

[0037] S1. Put 300kg of water into the reaction kettle, start stirring, put in 148kg of calcium hydroxide, and beat into calcium hydroxide slurry;

[0038] S2. Put 300kg of water into the reaction kettle, start stirring, put in 220kg of potassium fluorosilicate, and beat it into potassium fluorosilicate slurry; slowly pump the calcium hydroxide slurry into the potassium fluorosilicate slurry, fully react, and reach the end of the reaction The pH value is 9;

[0039] S3. After the reaction in the reactor is complete, the reaction liquid is separated from solid and liquid, and the solid is beaten into a potassium fluorosilicate synthesis process;

[0040] S4, the clear liquid is left to stand for 16 hours and then enters the concentration kettle.

[0041] S5. Pour the concentrated potassium fluoride mother liquor into the tank to be sprayed, and then put the concentrated potassium fluoride mother liquor into the spray drying tower for spray drying, and the finished product is a...

Embodiment 3

[0044] S1. Put 300kg of water into the reaction kettle, start stirring, put in 148kg of calcium hydroxide, and beat into calcium hydroxide slurry;

[0045] S2. Put 300kg of water into the reaction kettle, start stirring, put in 220kg of potassium fluorosilicate, and beat it into potassium fluorosilicate slurry; slowly pump the calcium hydroxide slurry into the potassium fluorosilicate slurry, fully react, and reach the end of the reaction The pH value is 9;

[0046] S3. After the reaction in the reactor is complete, the reaction liquid is separated from solid and liquid, and the solid is beaten into a potassium fluorosilicate synthesis process;

[0047] S4, after leaving the clear liquid for 24 hours, enter the concentration kettle.

[0048] S5. Pour the concentrated potassium fluoride mother liquor into the tank to be sprayed, and then put the concentrated potassium fluoride mother liquor into the spray drying tower for spray drying, and the finished product is anhydrous pot...

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PUM

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Abstract

The invention discloses a production process of potassium fluoride, and the method comprises the following steps: slowly pumping calcium hydroxide slurry into potassium fluosilicate slurry, and sufficiently reacting; carrying out solid-liquid separation on the reaction liquid to obtain a solid which is a mixture of calcium fluoride and silicon dioxide, and pulping the solid to enter a potassium fluosilicate synthesis process; standing clear liquid, and concentrating the clear liquid in a concentration kettle after settling to obtain potassium fluoride mother liquor; crystallizing and drying the concentrated potassium fluoride mother liquor to obtain anhydrous potassium fluoride; adding water into a reaction kettle, starting stirring, adding a mixture of calcium fluoride and silicon dioxide, supplementing potassium chloride and hydrochloric acid, carrying out sufficient reaction, and carrying out solid-liquid separation after the reaction is finished to obtain a solid, namely a potassium fluosilicate wet material finished product which is used for a potassium desilicication process. The calcium fluoride, silicon dioxide, potassium chloride and hydrochloric acid are used as raw materials, hydrofluoric acid is not needed, the calcium fluoride is a fluorine-containing wastewater treatment byproduct, and wastewater resource recovery is achieved.

Description

technical field [0001] The invention relates to the technical field of fluorine chemical industry, in particular to a production process of potassium fluoride. Background technique [0002] In the field of chemicals, salt is a very common chemical. Salts play a very important role in both industrial production and scientific inquiry in the laboratory. As one of the more common salts, potassium salt plays an important role in actual industrial production and scientific research. [0003] Among them, potassium fluoride is a relatively common potassium salt, which can also be called potassium fluoride salt. Its corresponding chemical formula is KF and its molecular weight is 58.10. It is white monoclinic crystal or crystalline powder under normal conditions, tastes salty, and is easy to absorb moisture. Meanwhile, potassium fluoride is extremely soluble in water and insoluble in ethanol. Its aqueous solution is alkaline and can corrode glass and porcelain, with a relative ...

Claims

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Application Information

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IPC IPC(8): C01D3/02C01D3/24C01F11/24
CPCC01D3/02C01D3/24C01F11/24
Inventor 张军航郭兰兰胡进华邓卫国厉皖成洪志林
Owner JIANGXI QUCHENG CHEM