CN104556180A - Production method of cryolite - Google Patents
Production method of cryolite Download PDFInfo
- Publication number
- CN104556180A CN104556180A CN201410744647.5A CN201410744647A CN104556180A CN 104556180 A CN104556180 A CN 104556180A CN 201410744647 A CN201410744647 A CN 201410744647A CN 104556180 A CN104556180 A CN 104556180A
- Authority
- CN
- China
- Prior art keywords
- cryolite
- solution
- sodium aluminum
- aluminum fluoride
- minutes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/50—Fluorides
- C01F7/54—Double compounds containing both aluminium and alkali metals or alkaline-earth metals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a production method of cryolite and particularly a method for byproduct synthesis of cryolite by adopting a phosphate fertilizer. The method comprises the following steps: neutralizing a fluosilicic acid with ammonia water; separating the formed ammonium fluoride solution and silicic acid by a filter press; adjusting the pH value of the separated ammonium fluoride clear liquid with sulfuric acid; feeding the adjusted solution into a cryolite synthesis tank, heating to 95 DEG C and preserving heat for 15 minutes; adding an aluminum sulfate solution and then quickly heating; adding sodium sulfate, preserving heat and stirring and reacting for 60 minutes, and removing the ammonia sulfate mother liquid through centrifugal separation; and performing pneumatic drying of the cryolite containing about 20% of water, wherein after the drying, the cryolite product is obtained. According to the method provided by the invention, the cryolite obtained through chemical reactions taking the phosphate fertilizer byproduct as a raw material has good quality, the production cost is low, and the environment can be effectively protected.
Description
Technical field
The present invention relates to a kind of production method of sodium aluminum fluoride, especially a kind of method utilizing phosphate fertilizer by-product synthetic cryolite.
Background technology
Sodium aluminum fluoride is mainly used as the solubility promoter of aluminium metallurgy, also can be used as the sterilant of farm crop, enamel opacifier, the opalizer of glass and enamel production and solubility promoter, the wear-resistant filler of resin rubber.The production of iron alloy and rimming steel can also be same as.Sodium aluminum fluoride has a small amount of natural deposit, at present, sodium aluminum fluoride industrialized production method mainly contains soda ash fluorine chloric acid method, clay bittern method, silicofluoric acid production sodium aluminum fluoride co-producing white carbon black method etc., these methods all need to take certain fluorine resource, production cost is relatively high, and current technology all exists the different environmental pollution of degree.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of production method of sodium aluminum fluoride, to improve the quality of products, reduces production cost, reduces the pollution to environment simultaneously.
Technical scheme of the present invention is: a kind of production method of sodium aluminum fluoride, comprises the following steps:
1) by the silicate fluoride solution of 10 ~ 12% with 17 ~ 18% ammonia neutralization, the add-on of ammoniacal liquor is as the criterion between 8.0 ~ 8.5 with the pH value controlling solution, keeps stirring reaction 1 hour;
2) be separated the ammonium fluoride solution and silicic acid that are formed with pressure filter, be separated the Neutral ammonium fluoride clear liquid sulfuric acid obtained and be adjusted to pH value 5.0 ~ 5.5;
3) solution after adjustment is sent into sodium aluminum fluoride synthesis groove, be heated to 90 ~ 95 DEG C, moisturizing 15 minutes;
4) alum liquor of stoichiometry 95% is added, after adding material, rapid temperature increases to 80 ~ 85 DEG C;
5) add the sodium sulfate of stoichiometry 105%, insulated and stirred reaction 45 ~ 60 minutes, the final ph controlling synthesis liquid is 3.0;
6) ammonium sulfate liquor is removed with centrifugation;
7) sodium aluminum fluoride containing about 20% water is carried out air stream drying at 100 ~ 110 DEG C; Namely sodium aluminum fluoride product is obtained after drying completes.
Beneficial effect of the present invention: method described in the present invention adopts byproduct of phosphatic fertilizer to be that raw material carries out that the sodium aluminum fluoride quality that chemical reaction obtains is good, production cost is low, simultaneously can effective protection of the environment.
Embodiment
Embodiment one
1) by the silicate fluoride solution of 10% with 17% ammonia neutralization, the add-on of ammoniacal liquor, to control the pH value of solution for 8.0, keeps stirring reaction 1 hour;
2) be separated the ammonium fluoride solution and silicic acid that are formed with pressure filter, be separated the Neutral ammonium fluoride clear liquid sulfuric acid obtained and be adjusted to pH value 5.0;
3) solution after adjustment is sent into sodium aluminum fluoride synthesis groove, be heated to 90 DEG C, moisturizing 15 minutes;
4) alum liquor of stoichiometry 95% is added, after adding material, rapid temperature increases to 80 DEG C;
5) add the sodium sulfate of stoichiometry 105%, insulated and stirred reacts 45 minutes, and the final ph controlling synthesis liquid is 3.0;
6) ammonium sulfate liquor is removed with centrifugation;
7) sodium aluminum fluoride containing about 20% water is carried out air stream drying at 110 DEG C; Namely sodium aluminum fluoride product is obtained after drying completes.
Embodiment two
1) by the silicate fluoride solution of 11% with 17.5% ammonia neutralization, the add-on of ammoniacal liquor, to control the pH value of solution for 8.2, keeps stirring reaction 1 hour;
2) be separated the ammonium fluoride solution and silicic acid that are formed with pressure filter, be separated the Neutral ammonium fluoride clear liquid sulfuric acid obtained and be adjusted to pH value 5.2;
3) solution after adjustment is sent into sodium aluminum fluoride synthesis groove, be heated to 92 DEG C, moisturizing 15 minutes;
4) alum liquor of stoichiometry 95% is added, after adding material, rapid temperature increases to 82 DEG C;
5) add the sodium sulfate of stoichiometry 105%, insulated and stirred reacts 50 minutes, and the final ph controlling synthesis liquid is 3.0;
6) ammonium sulfate liquor is removed with centrifugation;
7) sodium aluminum fluoride containing about 20% water is carried out air stream drying at 105 DEG C; Namely sodium aluminum fluoride product is obtained after drying completes.
Embodiment three
1) by the silicate fluoride solution of 12% with 18% ammonia neutralization, the add-on of ammoniacal liquor, to control the pH value of solution for 8.5, keeps stirring reaction 1 hour;
2) be separated the ammonium fluoride solution and silicic acid that are formed with pressure filter, be separated the Neutral ammonium fluoride clear liquid sulfuric acid obtained and be adjusted to pH value 5.5;
3) solution after adjustment is sent into sodium aluminum fluoride synthesis groove, be heated to 95 DEG C, moisturizing 15 minutes;
4) alum liquor of stoichiometry 95% is added, after adding material, rapid temperature increases to 85 DEG C;
5) add the sodium sulfate of stoichiometry 105%, insulated and stirred reacts 60 minutes, and the final ph controlling synthesis liquid is 3.0;
6) ammonium sulfate liquor is removed with centrifugation;
7) sodium aluminum fluoride containing about 20% water is carried out air stream drying at 100 DEG C; Namely sodium aluminum fluoride product is obtained after drying completes.
Claims (1)
1. a production method for sodium aluminum fluoride, comprises the following steps:
By the silicate fluoride solution of 10 ~ 12% with 17 ~ 18% ammonia neutralization, the add-on of ammoniacal liquor is as the criterion between 8.0 ~ 8.5 with the pH value controlling solution, keeps stirring reaction 1 hour;
Be separated the ammonium fluoride solution and silicic acid that are formed with pressure filter, be separated the Neutral ammonium fluoride clear liquid sulfuric acid obtained and be adjusted to pH value 5.0 ~ 5.5;
Solution after regulating is sent into sodium aluminum fluoride synthesis groove, is heated to 90 ~ 95 DEG C, moisturizing 15 minutes;
Add the alum liquor of stoichiometry 95%, after adding material, rapid temperature increases to 80 ~ 85 DEG C;
Add the sodium sulfate of stoichiometry 105%, insulated and stirred reaction 45 ~ 60 minutes, the final ph controlling synthesis liquid is 3.0;
Ammonium sulfate liquor is removed with centrifugation;
Sodium aluminum fluoride containing about 20% water is carried out air stream drying at 100 ~ 110 DEG C; Namely sodium aluminum fluoride product is obtained after drying completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744647.5A CN104556180A (en) | 2014-12-09 | 2014-12-09 | Production method of cryolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744647.5A CN104556180A (en) | 2014-12-09 | 2014-12-09 | Production method of cryolite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104556180A true CN104556180A (en) | 2015-04-29 |
Family
ID=53073385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410744647.5A Pending CN104556180A (en) | 2014-12-09 | 2014-12-09 | Production method of cryolite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104556180A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995216A (en) * | 2017-04-14 | 2017-08-01 | 衢州市鼎盛化工科技有限公司 | The preparation method and device of ice crystal |
| CN111020221A (en) * | 2019-12-11 | 2020-04-17 | 深圳雅居乐环保科技有限公司 | Method for preparing aluminum smelting composite fluxing agent by using aluminum alkaline residues |
-
2014
- 2014-12-09 CN CN201410744647.5A patent/CN104556180A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995216A (en) * | 2017-04-14 | 2017-08-01 | 衢州市鼎盛化工科技有限公司 | The preparation method and device of ice crystal |
| CN111020221A (en) * | 2019-12-11 | 2020-04-17 | 深圳雅居乐环保科技有限公司 | Method for preparing aluminum smelting composite fluxing agent by using aluminum alkaline residues |
| CN111020221B (en) * | 2019-12-11 | 2022-04-05 | 广州雅居乐固体废物处理有限公司 | Method for preparing aluminum smelting composite fluxing agent by using aluminum alkaline residues |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100577569C (en) | A kind of method of producing the Potassium monofluoride co-producing white carbon black | |
| CN101891504B (en) | Method for producing granular monoammonium phosphate with raffinate | |
| CN104313636B (en) | A kind of environment-protecting clean production technology of high-purity EDTA-2Na | |
| WO2012071565A3 (en) | Improved process for treating pond water | |
| CN105600763B (en) | A kind of method that fluoride salt method of purification produces industrial monoammonium phosphate | |
| CN103991882A (en) | Method for preparing potassium fluoride by using fluoride in liquid phase of wet process phosphoric acid | |
| CN101376507A (en) | Method for producing sodium fluoride | |
| CN101560120A (en) | Method for producing compound fertilizer by wet decomposing potassium feldspar | |
| CN104556179A (en) | Method for producing cryolite from fluorine-containing waste gas | |
| CN106800283B (en) | Production method of powdery fire-fighting grade monoammonium phosphate | |
| CN106698478A (en) | Recycling method of fluorine from wet-process phosphoric acid | |
| CN104556180A (en) | Production method of cryolite | |
| CN102887528B (en) | Production technology of ammonium bifluoride | |
| CN106241834B (en) | Sodium bifluoride technology is prepared using phosphorous chemical industry fluosilicic acid as byproduct | |
| CN102674284B (en) | Method for producing industrial monoammonium phosphate co-produced fertilizer grade monoammonium phosphate by extracted spent acid | |
| CN104150517B (en) | The useless comprehensive utilization production method of a kind of process two | |
| CN101734667A (en) | Process for producing precipitated white carbon black by silicon tetrachloride | |
| CN103879981B (en) | A kind of method utilizing phosphoric acid raffinate to prepare potassium primary phosphate | |
| CN107697939A (en) | A kind of method that ice crystal is produced using waste gas containing fluoride | |
| CN103159200B (en) | The production method of high raising rate nutritional fortification calcium formed coke disodium dihydrogen | |
| CN104118854A (en) | Method for preparing tripolyphosphate and hexametaphosphate products by using byproduct pyrophosphate | |
| CN103738967A (en) | Method for production of sodium fluosilicate from fluorine-containing acidic wastewater | |
| CN108083295A (en) | A kind of method that potassium fluoride is directly prepared using wet process phosphoric acid by-product fluosilicic acid | |
| CN107540066B (en) | Preparation process of poly-phosphorus aluminum chloride | |
| CN101798074B (en) | Method for using yellow phosphorus-refined dearsenization waste liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |