CN101077786A - Method for preparing aluminum fluoride - Google Patents
Method for preparing aluminum fluoride Download PDFInfo
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- CN101077786A CN101077786A CN 200610017812 CN200610017812A CN101077786A CN 101077786 A CN101077786 A CN 101077786A CN 200610017812 CN200610017812 CN 200610017812 CN 200610017812 A CN200610017812 A CN 200610017812A CN 101077786 A CN101077786 A CN 101077786A
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- fluoride
- aluminum
- aluminum fluoride
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Abstract
The present invention relates to process of producing aluminum fluoride with ammonium bifluoride solution and aluminum hydroxide as material. The process includes the following steps: adding aluminum hydroxide slurry in the reaction ratio into ammonium bifluoride solution inside a reactor to react at 100-130 deg.c for 20-40 min to produce aluminum fluoride solution, absorbing ammonia to obtain ammonia water, crystallizing aluminum fluoride at 80-100 deg.c for 3-5 hr to obtain aluminum fluoride trihydrate, drying and calcining to obtain aluminum fluoride product. 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, relate in particular to a kind of method with ammonium hydrogen fluoride solution and production of aluminum hydroxide aluminum fluoride.
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 has 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, thorough mixing under 500-600 ℃ temperature reacts with powdery aluminium hydroxide and hydrogen fluoride gas then, generate aluminum trifluoride at reactor bottom, aluminum trifluoride is sent 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, 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 greatly.
To achieve these goals, technical program of the present invention lies in adopting a kind of production method of aluminum fluoride, with ammonium hydrogen fluoride solution and aluminium hydroxide is raw material, aluminum hydroxide slime joined to fill in the ammonium hydrogen fluoride solution by reaction ratio react in the reactor, reinforced time 20-40 minute, temperature of reaction is controlled at 100 ℃-130 ℃, reaction generates aluminun fluoride solution, ammonia obtains ammoniacal liquor through absorption, with the aluminun fluoride solution crystallization, Tc 80-100 ℃, crystallization time 3-5 hour, crystallization obtains aluminum fluoride trihydrate, and the aluminum fluoride trihydrate drying and calcining is obtained aluminium fluoride product.
The concentration of described aluminum hydroxide slime is 40-60%.
The concentration of described ammonium hydrogen fluoride solution is 40-60%.
Reaction formula of the present invention is:
3NH
4HF
2+2Al(OH)
3＝2(AlF
3·3H
2O)+3NH
3↑
AlF
3·3H
2O＝AlF
3+3H
2O↑
The aluminium fluoride product mass analysis result who adopts method of the present invention to produce
| 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 a raw material with ammonium hydrogen fluoride solution and aluminium hydroxide, technology is simple, cost of material is low, thereby make cost of the present invention reduce greatly, adopt every performance of the aluminium fluoride product that method of the present invention produces to reach the requirement of the special one-level of GB, have good economic worth and social value.
Embodiment
Embodiment 1
The method of the production aluminum fluoride in the present embodiment is: with concentration is that 40% aluminum hydroxide slime joins to fill in the reactor that concentration is 60% ammonium hydrogen fluoride solution by reaction ratio and reacts, the reinforced 25 minutes time, temperature of reaction is controlled at 100 ℃, reaction generates aluminun fluoride solution, and ammonia obtains ammoniacal liquor through absorption, with the aluminun fluoride solution crystallization, 80 ℃ of Tcs, crystallization time is 5 hours, and crystallization obtains aluminum fluoride trihydrate, and the aluminum fluoride trihydrate drying and calcining is obtained aluminium fluoride product.
Embodiment 2
The method of the production aluminum fluoride of present embodiment is: be that 50% aluminum hydroxide slime joins to fill in the reactor that concentration is 50% ammonium hydrogen fluoride solution by reaction ratio and reacts with concentration, the reinforced time is 30 minutes, temperature of reaction is controlled at 110 ℃, reaction generates aluminun fluoride solution, and ammonia obtains ammoniacal liquor through absorption, with the aluminun fluoride solution crystallization, Tc is 90 ℃, crystallization time is 4 hours, and crystallization obtains aluminum fluoride trihydrate, and the aluminum fluoride trihydrate drying and calcining is obtained aluminium fluoride product.
Embodiment 3
The method of the production aluminum fluoride of present embodiment is: with concentration is that 60% aluminum hydroxide slime joins to fill in the reactor that concentration is 40% ammonium hydrogen fluoride solution by reaction ratio and reacts, the reinforced time is 40 minutes, temperature of reaction is controlled at 115 ℃, reaction generates aluminun fluoride solution, and ammonia obtains ammoniacal liquor through absorption, with the aluminun fluoride solution crystallization, Tc is 100 ℃, crystallization time is 3 hours, and crystallization obtains aluminum fluoride trihydrate, and the aluminum fluoride trihydrate drying and calcining is obtained aluminium fluoride product.
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 (3)
1, a kind of production method of aluminum fluoride, it is characterized in that: with ammonium hydrogen fluoride solution and aluminium hydroxide is raw material, aluminum hydroxide slime joined to fill in the ammonium hydrogen fluoride solution by reaction ratio react in the reactor, reinforced time 20-40 minute, temperature of reaction is controlled at 100 ℃-130 ℃, reaction generates aluminun fluoride solution, ammonia obtains ammoniacal liquor through absorption, with the aluminun fluoride solution crystallization, Tc 80-100 ℃, crystallization time 3-5 hour, crystallization obtained aluminum fluoride trihydrate, and the aluminum fluoride trihydrate drying and calcining is obtained aluminium fluoride product.
2, the production method of aluminum fluoride according to claim 1 is characterized in that: the concentration of described aluminum hydroxide slime is 40-60%.
3, the production method of aluminum fluoride according to claim 1 is characterized in that: the concentration of described ammonium hydrogen fluoride solution is 40-60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100178122A CN101077786B (en) | 2006-05-22 | 2006-05-22 | Method for preparing aluminum fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100178122A CN101077786B (en) | 2006-05-22 | 2006-05-22 | Method for preparing aluminum fluoride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101077786A true CN101077786A (en) | 2007-11-28 |
| CN101077786B CN101077786B (en) | 2010-11-17 |
Family
ID=38905482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100178122A Expired - Fee Related CN101077786B (en) | 2006-05-22 | 2006-05-22 | Method for preparing aluminum fluoride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101077786B (en) |
Cited By (4)
| 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 |
| CN102390853A (en) * | 2011-08-04 | 2012-03-28 | 中国铝业股份有限公司 | Preparation method for anhydrous aluminum fluoride |
| CN107032378A (en) * | 2016-11-25 | 2017-08-11 | 常宁市华骏再生资源有限公司 | A kind of method for preparing aluminum fluoride using fluorine-containing slag |
| CN107827133A (en) * | 2017-11-23 | 2018-03-23 | 达州励志环保科技有限公司 | A kind of production method of aluminum fluoride |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU632652A1 (en) * | 1977-05-03 | 1978-11-15 | Предприятие П/Я А-7125 | Method of obtaining aluminium fluoride |
-
2006
- 2006-05-22 CN CN2006100178122A patent/CN101077786B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390853A (en) * | 2011-08-04 | 2012-03-28 | 中国铝业股份有限公司 | Preparation method for anhydrous aluminum fluoride |
| 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 |
| CN107032378A (en) * | 2016-11-25 | 2017-08-11 | 常宁市华骏再生资源有限公司 | A kind of method for preparing aluminum fluoride using fluorine-containing slag |
| CN107827133A (en) * | 2017-11-23 | 2018-03-23 | 达州励志环保科技有限公司 | A kind of production method of aluminum fluoride |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101077786B (en) | 2010-11-17 |
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Granted publication date: 20101117 Termination date: 20140522 |