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Production technology of ammonium bifluoride

A technology of ammonium bifluoride and production process, applied in the direction of ammonium halide, etc., can solve the problem of high cost of hydrofluoric acid, achieve the effects of reducing raw material costs, improving product quality, and reducing production costs

Inactive Publication Date: 2013-01-23
JIANGXI QUCHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional method of producing ammonium bifluoride is mostly produced by the neutralization reaction of liquid ammonia-hydrofluoric acid. The hydrofluoric acid in the traditional process is mainly produced by the reaction of fluorite and sulfuric acid. The traditional process needs to consume precious resources fluorite and hydrofluoric acid. The acid cost is quite high, and the by-product fluosilicic acid produced by the reaction of fluorite and sulfuric acid to produce hydrofluoric acid has not been effectively used. Fluosilicic acid has 6 fluorines, while hydrofluoric acid has only one fluorine, so it is effective Use fluosilicic acid to release all 6 fluorines in fluosilicic acid instead of hydrofluoric acid, which can greatly reduce the production cost of potassium fluoride

Method used

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  • Production technology of ammonium bifluoride
  • Production technology of ammonium bifluoride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Add fluosilicic acid, a by-product of the anhydrous hydrogen fluoride production line, with a mass percentage concentration of 20% into the reactor, start stirring, and add sodium nitrilotriacetate at a uniform speed according to the required moles of the reaction formula Add 1.1 times of the mass percent concentration of ammonia water of 25%, fully react, and the pH value of the reaction end point is 8.5-9.

[0026] 2. After the reaction in the reactor is complete, the reaction liquid is separated from the solid and liquid, and the solid is beaten and cleaned to become high-purity silica, which can be sold as white carbon black after drying.

[0027] 3. Add the reaction liquid into the transfer tank, settle for 24 hours, and pour the clear liquid into the deamination kettle.

[0028] 4. Heating the reaction solution to remove ammonia, and the ammonia gas generated by the reaction is absorbed into ammonia water by cooling cycle, and stored in a storage tank for futur...

Embodiment 2

[0032] 1. Add fluosilicic acid, a by-product of the anhydrous hydrogen fluoride production line, with a mass percentage concentration of 30% into the reaction kettle, start stirring, add sodium nitrilotriacetate at a rate of 0.2% of the weight of fluosilicic acid, and uniformly follow the required moles of the reaction formula Add 1.1 times of the mass percent concentration of ammonia water of 25%, fully react, and the pH value of the reaction end point is 8.5-9.

[0033] 2. After the reaction in the reactor is complete, the reaction liquid is separated from the solid and liquid, and the solid is beaten and cleaned to become high-purity silica, which can be sold as white carbon black after drying.

[0034] 3. Add the reaction liquid into the transfer tank, settle for 24 hours, and pour the clear liquid into the deamination kettle.

[0035] 4. Heating the reaction solution to remove ammonia, and the ammonia gas generated by the reaction is absorbed into ammonia water by cooling...

Embodiment 3

[0039] 1. Add fluosilicic acid, a by-product of anhydrous hydrogen fluoride production line, with a mass percentage concentration of 40% into the reaction kettle, start stirring, add sodium nitrilotriacetate in an amount of 0.2% of the weight of fluosilicic acid, and uniformly follow the required moles of the reaction formula Add 1.1 times of the mass percent concentration of ammonia water of 25%, fully react, and the pH value of the reaction end point is 8.5-9.

[0040] 2. After the reaction in the reactor is complete, the reaction liquid is separated from the solid and liquid, and the solid is beaten and cleaned to become high-purity silica, which can be sold as white carbon black after drying.

[0041] 3. Add the reaction liquid into the transfer tank, settle for 24 hours, and pour the clear liquid into the deamination kettle.

[0042] 4. Heating the reaction solution to remove ammonia, and the ammonia gas generated by the reaction is absorbed into ammonia water by cooling ...

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Abstract

The invention provides a production technology of ammonium bifluoride. The technology takes the byproduct fluosilicic acid of an anhydrous hydrogen fluoride production line and ammonia water as major raw materials and is used for producing ammonium bifluoride and co-product high-purity silicon dioxide. According to the technology, a silicon complex reagent is added to prevent generation of the complex precipitate of the ammonium fluosilicate and ammonium fluoride when in ammonia desilicication, and the separability of silicon dioxide from water is improved; and hydrofluoric acid is not used in the ammonium bifluoride production technology. The invention provides a new method for producing ammonium bifluoride by replacing the anhydrous hydrogen fluoride with the byproduct fluosilicic acid of a fluorine-source anhydrous hydrogen fluoride production line; and 6 fluorine atoms in fluosilicic acid are all released to replace hydrofluoric acid, thus the production cost of potassium fluoride can be greatly reduced, the product quality of potassium fluoride is improved, the raw material cost of ammonium bifluoride is lowered, and the benefits of ammonium bifluoride production enterprises are increased.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a production process of ammonium bifluoride. Background technique [0002] Ammonium bifluoride is quite versatile and can corrode glass and is corrosive to skin. It can be used as a chemical reagent, glass etchant (in combination with hydrofluoric acid), disinfectant and antiseptic in fermentation industry, solvent for metal beryllium made of beryllium oxide, and surface treatment agent for silicon steel plates. It is also used in the manufacture of ceramics and magnesium alloys. Cleaning and descaling of boiler feed water system and steam generation system, as well as acid treatment of oil field sand and gravel, also used as catalyst component of alkylation and isomerization. It is used for smelting beryllium, making welding rods, cast steel, wood preservatives, etc. [0003] The traditional method of producing ammonium bifluoride is mostly produced by the neutralization react...

Claims

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Application Information

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IPC IPC(8): C01C1/16
Inventor 张军航
Owner JIANGXI QUCHENG CHEM
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