CN100360415C - Preparation method of cryolite - Google Patents
Preparation method of cryolite Download PDFInfo
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- CN100360415C CN100360415C CNB2005100175948A CN200510017594A CN100360415C CN 100360415 C CN100360415 C CN 100360415C CN B2005100175948 A CNB2005100175948 A CN B2005100175948A CN 200510017594 A CN200510017594 A CN 200510017594A CN 100360415 C CN100360415 C CN 100360415C
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- aluminum fluoride
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- ammonium
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- tai
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Abstract
The present invention relates to a praparation method of cryolite, which uses ammonium fluoroaluminate, aluminium sulfate and mirabilite as materials to react in aqueous phases. During reaction, first, ammonium fluoroaluminate is made into slurry with 15 to 45% of concentration, and the mirabilite is prepared into a sodium sulfate solution with the concentration of 250 to 300 g/l; calculated according to the molecular ratio n of generating cryolite, aluminium sulfate is added in according to the reaction ratio in order to prepare a mixed solution of aluminium sulfate and sodium sulfate; then, the prepared mixed solution of aluminium sulfate and sodium sulfate is uniformly added in the slurry of ammonium fluoroaluminate for reaction; after the materials are added, the reaction continues a certain period; after reaction, runny paste is filtered and fully washed, products are obtained after the filtered and washed runny paste is dried, and filtrate for filtration is an ammonium sulfate solution. Because the method of the present invention uses aluminum profile surface treating waste slag-ammonium fluoroaluminate as a main material, the production cost is lower, and in addition, the preparation method of the present invention has the advantages of simple process, easy control, easy acquisition of materials and low cost. The most important point is that the present invention 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 preparation method of sodium aluminum fluoride, this method is handled waste residue with aluminium shape surface---and ammonium aluminum fluoride, Tai-Ace S 150 and saltcake are raw material.
Background technology
The chemical name of sodium aluminum fluoride is a sodium fluoroaluminate, and molecular formula is Na3AlF6, mainly is used 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, and the aforesaid method ubiquity the relative problem of higher of production cost.
Summary of the invention
The object of the invention is to provide a kind of preparation method of sodium aluminum fluoride, to reduce its production cost.
To achieve these goals, technical program of the present invention lies in adopting a kind of preparation method of sodium aluminum fluoride, this method is that raw material reacts at aqueous phase with ammonium aluminum fluoride, Tai-Ace S 150 and saltcake, during reaction, earlier ammonium aluminum fluoride is made the slip that concentration is 15-45%, and saltcake is formulated as the metabisulfite solution of 250-300g/l, calculate according to the molecular ratio n that generates sodium aluminum fluoride, the n value is between 1-3, and n ≠ 3 add Tai-Ace S 150, make Tai-Ace S 150, sodium sulfate mixing solutions, wherein, the reaction ratio of Tai-Ace S 150 and sodium sulfate is (3-n): 6n; The Tai-Ace S 150, the sodium sulfate mixing solutions that prepare are evenly added in the ammonium aluminum fluoride slip, react: behind reinforced the end, continue reaction for some time: after reaction finishes, filter, thorough washing ointment, ointment after filtering, washing promptly gets product after drying, and filtering filtrate is ammoniumsulphate soln.
The granularity of described ammonium aluminum fluoride is the 150-300 order.
Entire reaction course is carried out under the temperature of normal temperature-100 ℃.
Reaction formula of the present invention is:
[6+2n](NH
4)
3AlF
6+[3-n]Al
2(SO
4)
3+[6n]Na
2SO
4＝
[12]AlF
3·nNaF+[9+3n](NH
4)
2SO
4
N in the formula: be the molecular ratio of sodium aluminum fluoride, the n value between 1-3, n ≠ 3.
Because method of the present invention is that waste residue---ammonium aluminum fluoride is a main raw material, and production cost is lower with the aluminium shape surface processing: in addition, preparation method's technology of the present invention is simple, is easy to control, and raw material is easy to get, and cost is low; More of paramount importance is exactly to the invention solves long-term the overstocking of ammonium aluminum fluoride waste material and the problem of environmental pollution that causes, has realized turning waste into wealth.
Embodiment
Embodiment 1
With granularity is that 150 purpose ammonium aluminum fluorides are made 20% slip, and saltcake is formulated as the metabisulfite solution of 300g/l, and getting the molecular ratio n that generates sodium aluminum fluoride is 1, presses reaction ratio and adds Tai-Ace S 150, makes Tai-Ace S 150, sodium sulfate mixing solutions; The ammonium aluminum fluoride slip is heated to 60 ℃, Tai-Ace S 150, the sodium sulfate mixing solutions for preparing evenly added in the ammonium aluminum fluoride slip, react; The reinforced 60 minutes time, add material after, continue reaction after 30 minutes, entire reaction course keeps 80 ℃ of temperature, after reaction finishes, filters, thorough washing ointment filters, the ointment after the washing promptly gets product after drying.
Embodiment 2
With granularity is that 200 purpose ammonium aluminum fluorides are made 30% slip, and saltcake is formulated as the metabisulfite solution of 250g/l, and getting the molecular ratio n that generates sodium aluminum fluoride is 1.5, presses reaction ratio and adds Tai-Ace S 150, makes Tai-Ace S 150, sodium sulfate mixing solutions; The ammonium aluminum fluoride slip is heated to 100 ℃, Tai-Ace S 150, the sodium sulfate mixing solutions for preparing evenly added in the ammonium aluminum fluoride slip, react; The reinforced 40 minutes time, add material after, continue reaction after 15 minutes, entire reaction course keeps 100 ℃ of temperature, after reaction finishes, filters, thorough washing ointment filters, the ointment after the washing promptly gets product after drying.
Embodiment 3
With granularity is that 300 purpose ammonium aluminum fluorides are made 45% slip, and saltcake is formulated as the metabisulfite solution of 280g/l, and getting the molecular ratio n that generates sodium aluminum fluoride is 2, adds Tai-Ace S 150 in proportion, makes Tai-Ace S 150, sodium sulfate mixing solutions; Ammonium aluminum fluoride slip normal temperature evenly adds Tai-Ace S 150, the sodium sulfate mixing solutions for preparing in the ammonium aluminum fluoride slip, reacts; The reinforced 90 minutes time, add material after, continue reaction after 30 minutes, entire reaction course normal temperature after reaction finishes, filters thorough washing ointment.Ointment after filtering, washing promptly gets product after drying, and filtering filtrate is ammonium chloride solution.
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 preparation method of sodium aluminum fluoride, it is characterized in that: this method is that raw material reacts at aqueous phase with ammonium aluminum fluoride, Tai-Ace S 150 and saltcake, during reaction, earlier ammonium aluminum fluoride is made the slip that concentration is 15-45%, and saltcake is formulated as the metabisulfite solution of 250-300g/l, calculate according to the molecular ratio n that generates sodium aluminum fluoride, the n value is between 1-3, and n ≠ 3, add Tai-Ace S 150, make Tai-Ace S 150, sodium sulfate mixing solutions, wherein, the reaction ratio of Tai-Ace S 150 and sodium sulfate is (3-n): 6n; The Tai-Ace S 150, the sodium sulfate mixing solutions that prepare are evenly added in the ammonium aluminum fluoride slip, react: behind reinforced the end, continue reaction for some time; After reaction finishes, filter, thorough washing ointment, the ointment after filtering, washing promptly gets product after drying, and filtering filtrate is ammoniumsulphate soln.
2, the preparation method of sodium aluminum fluoride according to claim 1 is characterized in that: the granularity of described ammonium aluminum fluoride is the 150-300 order.
3, the preparation method of sodium aluminum fluoride according to claim 2 is characterized in that: entire reaction course is carried out under the temperature of normal temperature-100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100175948A CN100360415C (en) | 2005-05-23 | 2005-05-23 | Preparation method of cryolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100175948A CN100360415C (en) | 2005-05-23 | 2005-05-23 | Preparation method of cryolite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1868887A CN1868887A (en) | 2006-11-29 |
| CN100360415C true CN100360415C (en) | 2008-01-09 |
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|---|---|---|---|
| CNB2005100175948A Expired - Fee Related CN100360415C (en) | 2005-05-23 | 2005-05-23 | Preparation method of cryolite |
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| CN (1) | CN100360415C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555033B (en) * | 2009-03-20 | 2011-08-24 | 云南云天化国际化工股份有限公司 | Method for preparing cryolite and coproducing soluble glass by using hydrof luorosilicic acid |
| CN102649577A (en) * | 2012-05-23 | 2012-08-29 | 深圳市新星轻合金材料股份有限公司 | Sodium cryolite for aluminum electrolytic industry and preparation method thereof |
Citations (5)
| 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 |
| CN1539378A (en) * | 2003-04-21 | 2004-10-27 | GEҽ��ϵͳ����������˾ | Radiation computer fault scanner |
-
2005
- 2005-05-23 CN CNB2005100175948A patent/CN100360415C/en not_active Expired - Fee Related
Patent Citations (5)
| 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 |
| CN1539378A (en) * | 2003-04-21 | 2004-10-27 | GEҽ��ϵͳ����������˾ | Radiation computer fault scanner |
Non-Patent Citations (1)
| Title |
|---|
| 冰晶石产品的生产技术及市场状况. 丁慧萍.云南冶金，第33卷第3期. 2004 * |
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| CN1868887A (en) | 2006-11-29 |
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Granted publication date: 20080109 Termination date: 20120523 |