CN107540001A - A kind of ammonium acid fluoride production technology - Google Patents
A kind of ammonium acid fluoride production technology Download PDFInfo
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- CN107540001A CN107540001A CN201610484691.6A CN201610484691A CN107540001A CN 107540001 A CN107540001 A CN 107540001A CN 201610484691 A CN201610484691 A CN 201610484691A CN 107540001 A CN107540001 A CN 107540001A
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- fluoride
- ammonium acid
- ammonium
- acid fluoride
- ammonia
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to chemical products production field, especially ammonium acid fluoride production field.Ammonium acid fluoride be it is a kind of there is corrosive chemical substance, in case of wet, the poisonous fluoride of water decomposition, nitrogen oxides and ammonia gas.It is weak acid to be dissolved in water, can dissolve glass, be slightly soluble in alcohol, is highly soluble in cold water, and the aqueous solution is in highly acid, can be distilled at relatively high temperatures, energy etching glass, skin is corrosive, poisonous.Ammonium acid fluoride is neutralized by anhydrous hydrofluoric acid and liquefied ammonia and obtained.Neutralisation is first passed through anhydrous hydrofluoric acid, mixed with circulating mother liquor, cooled down in vessel jacket with cold water in the container of lead or plastics, then slowly, liquefied ammonia is intermittently passed through with thread and is stirred continuously, be allowed to fully react.Determined at any time with Congored test paper in operation, when to reagent being just terminal in brown, stopping is passed through liquefied ammonia.Reaction solution is concentrated by evaporation untill crystalline film is presented in liquid level, then crystallisation by cooling, after centrifugation, synthesizes ammonium acid fluoride finished product.Vapor phase method is obtained by gaseous ammonia and the direct vapor- phase synthesis of pure hydrogen fluoride gas.
Description
Technical field
The present invention relates to chemical products production field, especially ammonium acid fluoride production field.
Background technology
Ammonium acid fluoride be it is a kind of there is corrosive chemical substance, in case of wet, the poisonous fluoride of water decomposition, nitrogen oxides with
Ammonia gas.It is weak acid to be dissolved in water, can dissolve glass, be slightly soluble in alcohol, is highly soluble in cold water, the aqueous solution is in highly acid, higher
At a temperature of can distil, can etching glass, skin is corrosive, it is poisonous.
Ammonium acid fluoride is neutralized by anhydrous hydrofluoric acid and liquefied ammonia and obtained.Neutralisation is first led in the container of lead or plastics
Enter anhydrous hydrofluoric acid, mixed with circulating mother liquor, cooled down in vessel jacket with cold water, then slowly, intermittently led to thread
Enter liquefied ammonia and be stirred continuously, be allowed to fully react.Determined at any time with Congored test paper in operation, be just terminal in brown to reagent
When, stopping is passed through liquefied ammonia.Reaction solution is concentrated by evaporation untill crystalline film is presented in liquid level, then crystallisation by cooling, centrifuges it
Afterwards, ammonium acid fluoride finished product is synthesized.Vapor phase method is obtained by gaseous ammonia and the direct vapor- phase synthesis of pure hydrogen fluoride gas.
The content of the invention
Ammonium acid fluoride is produced using liquid phase synthesizing method, shares a production line with ammonium fluoride, potassium fluoride, its year production period is about
For 170 days.Concrete technology is：It will first be imported after 50% or so etching acid solution measures with pump in normal pressure graphite reactor, stirring
And temperature is controlled at 80 ~ 90 DEG C, afterwards according to the dosage of hydrogen fluoride, the ammonia usage needed for production ammonium acid fluoride is calculated,
Then it is slowly introducing the ammonia through metering and carries out synthetic reaction, and control ph is needed according to product（Produce needed for ammonium acid fluoride
PH value is 3.0 ~ 4.0）, circulating cooling water leg, which is cooled to 20 ~ 25 DEG C, to be isolated to enter after the ammonium acid fluoride largely crystallized and takes out
Filter pocket carries out separation of solid and liquid, and the mother liquor isolated is evaporated concentration into double effect evaporator, after concentration to a certain extent, returns
Crystallisation by cooling kettle carries out Crystallization Separation again, and the ammonium acid fluoride crystal separated is after drying, carries out packaging of weighing.Entirely
Production process is all carried out under air-tight state.
Chemical equation is as follows：2HF+NH3→NH4HF2（Acid-base reaction）.
Claims (2)
1. the present invention relates to material composition and proportioning.
2. the present invention relates to production procedure：Ammonium acid fluoride is produced using liquid phase synthesizing method, and a life is shared with ammonium fluoride, potassium fluoride
Producing line, its year production period are about 170 days；Concrete technology is：Normal pressure first will be imported with pump after 50% or so etching acid solution measures
In graphite reactor, stir and control temperature, afterwards according to the dosage of hydrogen fluoride, to calculate production hydrogen fluoride at 80 ~ 90 DEG C
Ammonia usage needed for ammonium, then it is slowly introducing the ammonia through metering and carries out synthetic reaction, and control ph is needed according to product
（It is 3.0 ~ 4.0 to produce pH value needed for ammonium acid fluoride）, circulating cooling water leg is cooled to 20 ~ 25 DEG C and isolates what is largely crystallized
Enter suction filtration tank after ammonium acid fluoride and carry out separation of solid and liquid, the mother liquor isolated is evaporated concentration into double effect evaporator, concentrates
After to a certain extent, return to crystallisation by cooling kettle and carry out Crystallization Separation again, and the ammonium acid fluoride crystal separated is after drying,
Carry out packaging of weighing；Whole production process is all carried out under air-tight state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610484691.6A CN107540001A (en) | 2016-06-29 | 2016-06-29 | A kind of ammonium acid fluoride production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610484691.6A CN107540001A (en) | 2016-06-29 | 2016-06-29 | A kind of ammonium acid fluoride production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107540001A true CN107540001A (en) | 2018-01-05 |
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ID=60962032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610484691.6A Pending CN107540001A (en) | 2016-06-29 | 2016-06-29 | A kind of ammonium acid fluoride production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107540001A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439365A (en) * | 2018-05-10 | 2018-08-24 | 湖北祥云(集团)化工股份有限公司 | A kind of method that sylvite circular treatment fluosilicic acid prepares ammonium acid fluoride |
| CN113479907A (en) * | 2021-07-15 | 2021-10-08 | 江西省东沿药业有限公司 | Crystallization method of ammonium fluoride or ammonium bifluoride |
-
2016
- 2016-06-29 CN CN201610484691.6A patent/CN107540001A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439365A (en) * | 2018-05-10 | 2018-08-24 | 湖北祥云(集团)化工股份有限公司 | A kind of method that sylvite circular treatment fluosilicic acid prepares ammonium acid fluoride |
| CN108439365B (en) * | 2018-05-10 | 2019-11-12 | 湖北祥云(集团)化工股份有限公司 | A kind of method that sylvite circular treatment fluosilicic acid prepares ammonium acid fluoride |
| CN113479907A (en) * | 2021-07-15 | 2021-10-08 | 江西省东沿药业有限公司 | Crystallization method of ammonium fluoride or ammonium bifluoride |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |
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| WD01 | Invention patent application deemed withdrawn after publication |