CN101077788A - Method for preparing aluminum fluoride - Google Patents
Method for preparing aluminum fluoride Download PDFInfo
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- CN101077788A CN101077788A CN 200610017814 CN200610017814A CN101077788A CN 101077788 A CN101077788 A CN 101077788A CN 200610017814 CN200610017814 CN 200610017814 CN 200610017814 A CN200610017814 A CN 200610017814A CN 101077788 A CN101077788 A CN 101077788A
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- Prior art keywords
- aluminum fluoride
- reaction
- solid
- present
- aluminium hydroxide
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Abstract
The present invention relates to process of producing aluminum fluoride with ammonium fluoroaluminate and aluminum hydroxide as material. The process includes the following steps: mixing solid ammonium fluoroaluminate and solid aluminum hydroxide in the reaction ratio inside a reactor to react at 500-600 deg.c to produce solid aluminum fluoride product, and condensating the mixed gas of ammonia and water vapor the reaction produces to obtain ammonia water. The process is simple, and has low cost and high aluminum fluoride product quality.
Description
Technical field
The present invention relates to a kind of production method of aluminum fluoride, relating in particular to a kind of is the method for raw material production aluminum fluoride with ammonium aluminum fluoride and aluminium hydroxide.
Background technology
Aluminum fluoride is used as auxiliary agent in Aluminum Electrolysis Production, be used to reduce electrolytical fusing point, improve electrolytical electric conductivity.Its traditional processing technology is a hydrofluoric acid---dry process and hydrofluoric acid---wet process technique.The raw material of hydrofluoric acid---dry process is hydrogen fluoride and aluminium hydroxide, its production technique is for comprising that aluminium hydroxide is carried out pre-treatment removes crystal water, the thorough mixing reaction under 500-600 ℃ temperature with powdery and hydrogen fluoride gas then, generate aluminum trifluoride at reactor bottom, with aluminum trifluoride send into rotary drum cool off finished product; The raw material of hydrofluoric acid---wet processing is hydrofluoric acid and aluminium hydroxide, and production technique is that hydrofluoric acid and aluminum hydroxide slime react, crystallization, gets aluminum fluoride trihydrate, and drying dehydration again makes aluminium fluoride product.Above-mentioned production technique cost of material height, the production cost height, and the dry process facility investment is big, complex process.
Summary of the invention
The object of the invention is to provide a kind of production method of aluminum fluoride, to reduce production costs, simplifies production technique.
To achieve these goals, technical program of the present invention lies in adopting a kind of method of producing aluminum fluoride, with ammonium aluminum fluoride and aluminium hydroxide is raw material, ammonium aluminum fluoride solid and aluminium hydroxide solid are pressed reaction ratio thorough mixing and reaction in reactor, temperature of reaction is controlled at 500-600 ℃, reaction has generated the solid phase prod aluminum fluoride, and the ammonia of reaction generation and the Mixed Gas Condensation of water vapour are obtained ammoniacal liquor.
Reaction formula of the present invention is:
(NH
4)
3AlF
6+Al(OH)
3＝2AlF
3+3NH
3↑+3H
2O↑
The aluminium fluoride product mass analysis result that method of the present invention generated
| Grade | Chemical ingredients % | |||||||
| Be not less than | Impurity is not more than | |||||||
| F | Al | Na | SiO 2 | Fe 2O 3 | SO 4 2- | P 2O 5 | H 2O | |
| Special one-level | 61 | 30 | 0.5 | 0.28 | 0.10 | 0.5 | 0.04 | 0.5 |
| Special secondary | 60 | 30 | 0.5 | 0.30 | 0.13 | 0.8 | 0.04 | 1.0 |
| One-level | 58 | 28.2 | 3.0 | 0.30 | 0.13 | 1.1 | 0.04 | 6.0 |
| Secondary | 57 | 28.2 | 3.5 | 0.35 | 0.15 | 1.2 | 0.04 | 7.0 |
| Present method 1# | 61.8 | 31 | 0.2 | 0.15 | 0.01 | 0.4 | 0.01 | 0.3 |
| Present method 2# | 61.3 | 30.8 | 0.2 | 0.18 | 0.02 | 0.5 | 0.02 | 0.4 |
Method of the present invention is the raw material production aluminum fluoride with ammonium aluminum fluoride and aluminium hydroxide, cost of material is low, thereby make method cost of the present invention reduce greatly, reaction process is simple, the aluminium fluoride product that is generated has met and exceeded the requirement of the special one-level of GB, has good economic worth and social value.
Embodiment
Embodiment 1
The method of the production aluminum fluoride of present embodiment is: ammonium aluminum fluoride solid and aluminium hydroxide solid are pressed reaction ratio thorough mixing and reaction in reactor, temperature of reaction is controlled at 500 ℃, reaction has generated the solid phase prod aluminum fluoride, and the Mixed Gas Condensation of ammonia and water vapour is obtained ammoniacal liquor.
Embodiment 2
The method of the production aluminum fluoride of present embodiment is: ammonium aluminum fluoride solid and aluminium hydroxide solid are pressed reaction ratio thorough mixing and reaction in reactor, temperature of reaction is controlled at 550 ℃, reaction has generated the solid phase prod aluminum fluoride, and the Mixed Gas Condensation of ammonia and water vapour is obtained ammoniacal liquor.
Embodiment 3
The method of the production aluminum fluoride of present embodiment is: ammonium aluminum fluoride solid and aluminium hydroxide solid are pressed reaction ratio thorough mixing and reaction in reactor, temperature of reaction is controlled at 600 ℃, reaction has generated the solid phase prod aluminum fluoride, and the Mixed Gas Condensation of ammonia and water vapour is obtained ammoniacal liquor.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (1)
1, a kind of production method of aluminum fluoride, it is characterized in that: with ammonium aluminum fluoride and aluminium hydroxide is raw material, ammonium aluminum fluoride solid and aluminium hydroxide solid are pressed reaction ratio thorough mixing and reaction in reactor, temperature of reaction is controlled at 500-600 ℃, reaction has generated the solid phase prod aluminum fluoride, and the ammonia of reaction generation and the Mixed Gas Condensation of water vapour are obtained ammoniacal liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610017814 CN101077788A (en) | 2006-05-22 | 2006-05-22 | Method for preparing aluminum fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610017814 CN101077788A (en) | 2006-05-22 | 2006-05-22 | Method for preparing aluminum fluoride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101077788A true CN101077788A (en) | 2007-11-28 |
Family
ID=38905484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610017814 Pending CN101077788A (en) | 2006-05-22 | 2006-05-22 | Method for preparing aluminum fluoride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101077788A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320639A (en) * | 2011-09-08 | 2012-01-18 | 多氟多化工股份有限公司 | Production system and production method for anhydrous aluminum fluoride |
| CN103771473A (en) * | 2014-02-18 | 2014-05-07 | 贵州万方铝化科技开发有限公司 | Method for preparing small particle size Al2O3 powder |
| CN114349034A (en) * | 2022-02-08 | 2022-04-15 | 东北大学 | Preparation method of anhydrous aluminum fluoride |
-
2006
- 2006-05-22 CN CN 200610017814 patent/CN101077788A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320639A (en) * | 2011-09-08 | 2012-01-18 | 多氟多化工股份有限公司 | Production system and production method for anhydrous aluminum fluoride |
| CN102320639B (en) * | 2011-09-08 | 2013-03-13 | 多氟多化工股份有限公司 | Production system and production method for anhydrous aluminum fluoride |
| CN103771473A (en) * | 2014-02-18 | 2014-05-07 | 贵州万方铝化科技开发有限公司 | Method for preparing small particle size Al2O3 powder |
| CN103771473B (en) * | 2014-02-18 | 2015-08-05 | 贵州万方铝化科技开发有限公司 | One prepares small particle size Al 2o 3the method of powder |
| CN114349034A (en) * | 2022-02-08 | 2022-04-15 | 东北大学 | Preparation method of anhydrous aluminum fluoride |
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Open date: 20071128 |