CN1325380C - Cryolite production method - Google Patents
Cryolite production method Download PDFInfo
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- CN1325380C CN1325380C CNB2004100604703A CN200410060470A CN1325380C CN 1325380 C CN1325380 C CN 1325380C CN B2004100604703 A CNB2004100604703 A CN B2004100604703A CN 200410060470 A CN200410060470 A CN 200410060470A CN 1325380 C CN1325380 C CN 1325380C
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- aluminum fluoride
- minutes
- ammonium
- salt
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Abstract
The present invention relates to a cryolite production method which comprises the following steps: ammonium fluoroaluminate, industrial salt and sodium hudroxide are used as materials to react in water phases; first, ammonium fluoroaluminate is prepared into slurry and is then slowly and uniformly added in industrial salt water under the condition of normal temperature, the feeding time lasts 45 to 60 minutes, and a small amount of sodium hudroxide is added in salt water solution in advance; after the termination of feeding, the temperature begins to rise to 80 to 120 DEG C within 45 to 60 minutes at uniform speed; after the temperature continues for 15 to 30 minutes, ointment is obtained through filtration, and products are obtained through calcination with high temperature of 300 to 400 DEG C. Compared with the previous cryolite production methods, the present invention has the characteristics of lower production cost because of using aluminum profile surface treating waste slag-ammonium fluoroaluminate as materials, simple method and technology and easy control, solves the problem of environmental pollution caused by the long-term overstock of ammonium fluoroaluminate waste, and changes waste into valuables.
Description
Technical field
The present invention relates to a kind of production method of sodium aluminum fluoride, relate in particular to and a kind ofly handle with aluminium shape surface that waste residue---ammonium aluminum fluoride is the production method of the sodium aluminum fluoride of main raw material.
Background technology
The chemical name of sodium aluminum fluoride is a sodium fluoroaluminate, and molecular formula is Na
3AlF
6, mainly as the fusing assistant of electrolysis of aluminum, the wear-resistant filler of rubber, emery wheel, enamelled opacifier, the opalizer of glass and metal flux etc.The sodium aluminum fluoride traditional processing technology is a hydrofluoaluminic acid soda ash method, and clay bittern method, Sodium Silicofluoride method and hydrofluoric acid sodium aluminate method etc. are arranged in addition.It is higher that above-mentioned technology all has cost, invest bigger, and the comparatively complicated shortcoming of reaction process.
Summary of the invention
The object of the invention is to provide a kind of production method of sodium aluminum fluoride, to reduce production costs.
For achieving the above object, technical program of the present invention lies in adopting a kind of production method of sodium aluminum fluoride, this method is with ammonium aluminum fluoride, Industrial Salt and caustic soda are that raw material reacts at aqueous phase, wherein, the granularity of ammonium aluminum fluoride raw material is the 180-220 order, earlier ammonium aluminum fluoride is mixed with slip, the concentration of the ammonium aluminum fluoride slip that is mixed with is 15-25%, slowly evenly join then in the industrial brine under the normal temperature condition, the reinforced time is 45-60 minute, wherein Industrial Salt is mixed with the salt solution that concentration is 250-300g/l, will add a small amount of caustic soda, the concentration 20-30Kg/m of caustic soda earlier in the salt brine solution
3After treating reinforced end, begin to heat up, in 45-60 minute, at the uniform velocity be warming up to 80-120 ℃, continue insulation after 15-30 minute, filter, get ointment, after 300-400 ℃ of high-temperature calcination, promptly get product.
Chemical equation of the present invention is as follows:
(NH
4)
3AIF
6+3NaCl→Na
3AIF
6+3NH
4Cl
The present invention is with respect in the past sodium aluminum fluoride production method, and it has the following advantages: (1) is owing to utilized aluminium shape surface to handle that waste residue---ammonium aluminum fluoride is a raw material, and production cost is lower; (2) this method technology is simple, is easy to control; (3) solved the ammonium aluminum fluoride waste material and overstock the problem of environmental pollution that causes for a long time, can turn waste into wealth.The purpose that adds caustic soda among the present invention is that the maintenance reaction solution is an alkaline state, thereby promotes the carrying out of reaction, because ammonium aluminum fluoride is very slow with the sodium-chlor reaction under non-alkaline environment.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1:
With granularity is that 180 purpose ammonium aluminum fluorides are made 20% slip, and Industrial Salt is formulated as the salt solution of 300g/l, by concentration sodium hydroxide 25Kg/m
3Salt solution adding concentration is 35% caustic soda; The ammonium aluminum fluoride slip for preparing is slowly evenly added in the salt solution for preparing, and the reinforced time was controlled at 60 minutes; Behind reinforced the end, begin to heat up, in 1 hour, at the uniform velocity be warming up to 100 ℃, continue insulation after 15 minutes, begin to filter; Ointment after the filtration promptly gets product after 400 ℃ of calcinings.
Embodiment 2:
With granularity is that 200 purpose ammonium aluminum fluorides are made 15% slip, and Industrial Salt is formulated as the salt solution of 250g/l, by concentration sodium hydroxide 20Kg/m
3Salt solution adding concentration is 30% caustic soda; The ammonium aluminum fluoride slip for preparing is slowly evenly added in the salt solution for preparing, and the reinforced time was controlled at 45 minutes; After adding material, begin to heat up, in 1 hour, at the uniform velocity be warming up to 100 ℃, continue insulation after 20 minutes, just can begin to filter; Ointment after the filtration promptly gets product after 300 ℃ of calcinings.
Embodiment 3:
With granularity is that 220 purpose ammonium aluminum fluorides are made 25% slip, and Industrial Salt is formulated as the salt solution of 280g/l, by concentration sodium hydroxide 25Kg/m
3Salt solution adding concentration is 30% caustic soda; The ammonium aluminum fluoride slip for preparing is slowly evenly added in the salt solution for preparing, and the reinforced time was controlled at 55 minutes; Behind reinforced the end, begin to heat up, in 1 hour, at the uniform velocity be warming up to 100 ℃, continue insulation after 25 minutes, just can begin to filter; Ointment after the filtration promptly gets product after 350 ℃ of calcinings.
Claims (1)
1, a kind of production method of sodium aluminum fluoride, it is characterized in that: this method is that raw material reacts at aqueous phase with ammonium aluminum fluoride, Industrial Salt and caustic soda, wherein, the granularity of ammonium aluminum fluoride raw material is the 180-220 order, earlier ammonium aluminum fluoride is mixed with slip, the concentration of the ammonium aluminum fluoride slip that is mixed with is 15-25%, slowly evenly join then in the industrial brine under the normal temperature condition, the reinforced time is 45-60 minute, wherein Industrial Salt is mixed with the salt solution that concentration is 250-300g/l, to add a small amount of caustic soda, the concentration 20-30Kg/m of caustic soda earlier in the salt brine solution
3After treating reinforced end, begin to heat up, in 45-60 minute, at the uniform velocity be warming up to 80-120 ℃, continue insulation after 15-30 minute, filter, get ointment, after 300-400 ℃ of high-temperature calcination, promptly get product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100604703A CN1325380C (en) | 2004-08-19 | 2004-08-19 | Cryolite production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100604703A CN1325380C (en) | 2004-08-19 | 2004-08-19 | Cryolite production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1736874A CN1736874A (en) | 2006-02-22 |
| CN1325380C true CN1325380C (en) | 2007-07-11 |
Family
ID=36079864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100604703A Expired - Fee Related CN1325380C (en) | 2004-08-19 | 2004-08-19 | Cryolite production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1325380C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264919B (en) * | 2008-04-23 | 2010-06-02 | 河南未来铝业（集团）有限公司 | Cosmetics-stage cryolite and producing technique thereof |
| CN109019649B (en) * | 2018-09-18 | 2020-10-20 | 福建省漳平市九鼎氟化工有限公司 | Preparation method of high-molecular-ratio potassium fluoroaluminate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU431113A1 (en) * | 1970-04-20 | 1974-06-05 | В. Г. Морозов, О. С. Игнатьев, И. А. Варлаков , В. Н. Коровин Институт химии , технологии резких элементов , минерального | METHOD OF OBTAINING FLUORINE ALUMINUM |
| US3816591A (en) * | 1972-05-05 | 1974-06-11 | Oesterr Stickstoffwerke Ag | Process for the recovery of aluminium and fluorine from a dilute aqueous solution |
| CN1456507A (en) * | 2002-05-10 | 2003-11-19 | 焦作市多氟多化工有限公司 | Method for producing cryolite |
| CN1491892A (en) * | 2002-10-23 | 2004-04-28 | 赵小春 | Method for producing cryolite |
-
2004
- 2004-08-19 CN CNB2004100604703A patent/CN1325380C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU431113A1 (en) * | 1970-04-20 | 1974-06-05 | В. Г. Морозов, О. С. Игнатьев, И. А. Варлаков , В. Н. Коровин Институт химии , технологии резких элементов , минерального | METHOD OF OBTAINING FLUORINE ALUMINUM |
| US3816591A (en) * | 1972-05-05 | 1974-06-11 | Oesterr Stickstoffwerke Ag | Process for the recovery of aluminium and fluorine from a dilute aqueous solution |
| CN1456507A (en) * | 2002-05-10 | 2003-11-19 | 焦作市多氟多化工有限公司 | Method for producing cryolite |
| CN1491892A (en) * | 2002-10-23 | 2004-04-28 | 赵小春 | Method for producing cryolite |
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| Publication number | Publication date |
|---|---|
| CN1736874A (en) | 2006-02-22 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20070711 Termination date: 20130819 |