CN1215971C - Refining method for removing chlorate from perchlorate - Google Patents
Refining method for removing chlorate from perchlorate Download PDFInfo
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- CN1215971C CN1215971C CN 03118008 CN03118008A CN1215971C CN 1215971 C CN1215971 C CN 1215971C CN 03118008 CN03118008 CN 03118008 CN 03118008 A CN03118008 A CN 03118008A CN 1215971 C CN1215971 C CN 1215971C
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- chlorate
- perchlorate
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Abstract
The present invention discloses a refining method for removing chlorate from perchlorate, which is realized by that stoichiometric metasulfite solution or solids are added to perchlorate according to the content of chlorate so that the metasulfite solution or solids and the chlorate have a chemical reaction, and the chlorate is decomposed into a compound which can be easily dissolved in water; the perchlorate in the product does not react with the compound, and a small amount of acid generated in the reaction is neutralized by alkali so as to obtain solution with a pH value of 7 to 9. The content of chlorate in perchlorate can be controlled less than 0.003 % (by chlorine), which reaches the national index of a high-quality product, and the content of chlorate in perchlorate can also conform to quality requirements for firework products in countries of Europe and America.
Description
Technical Field
The invention relates to a refining method for removing chlorate from perchlorate.
Background
The prior production method of perchlorate mostly adopts the process of electrolyzing chlorate saturated solution. The perchlorate produced by the method usually contains a certain amount of chlorate, the existing method for removing the chlorate is to recrystallize a crude perchlorate, but the perchlorate (calculated by chlorine) in the product of the refining method is still as high as 0.4 percent, which is explained in the tenth volume of the encyclopedia of chemical engineering in China. The chlorate content in national high-quality products can only be below 0.02 percent, and the chlorate content in national fireworks products such as Europe and America is more required to be below 0.003 percent, so the prior refining method can not meet the requirements of the national high-quality products and can not meet the quality requirements of the national fireworks products such as Europe and America.
Disclosure of Invention
The invention aims to provide a refining method for effectively removing chlorate from perchlorate, which can ensure that the perchlorate reaches the index of national high-quality products at one time and can also meet the quality requirements of European and American countries on fireworks products.
The technical scheme of the invention is that in the refining process of a perchlorate crude product, a pyrosulfite solution or solid which is stoichiometric and has the same cation is added according to the content of chlorate in potassium perchlorate or sodium perchlorate, so that the pyrosulfite solution or solid reacts with chlorate to decompose chlorate into a compound which is easy to dissolve in water, the perchlorate in the product does not react with the compound, and a small amount of acid generated by the reaction is neutralized to the pH value of the solution of 7-9 by alkali.
The chemical reaction formula is as follows:
the generated by-product is easy to dissolve in water, has low concentration and does not enter into the perchlorate product. In actual work, the chlorate content in the product can be controlled by controlling the dosage of sodium (potassium) pyrosulfite according to different requirements of different products on the content of chlorate. And can completely remove chlorate in the product.
By implementing the method, the chlorate content in the perchlorate can be greatly reduced, the dosage of sodium (potassium) pyrosulfite added in each ton of products is more than 5kg, and the chlorate content can be controlled to be below 0.003 percent (calculated by chlorine). Can lead the perchlorate product to reach the index of national high-quality products at one time and also can meet the quality requirements of European and American countries on the firework products.
Detailed Description
Example 1:
5 tons of crude potassium perchlorate contains 0.1 percent of chlorate, 30kg of potassium metabisulfite is added into the solution in the refining process to react with the chlorate to decompose the chlorate into a compound which is easy to dissolve in water, the perchlorate in the product does not react with the compound, and a small amount of acid generated by the reaction is added into solid KOH to adjust the pH value of the solution to be 7. Cooling and crystallizing the solution, drying and crushing the product, and detecting that the chlorate content is 0.002%. The treated solution is used as circulating mother liquor and returned to the electrolytic bath.
Example 2:
2 tons of crude sodium perchlorate product containing 0.2 percent of chlorate is added, 50kg of sodium metabisulfite is added into the solution during the refining process to react with the chlorate to decompose the chlorate into a compound which is easy to dissolve in water, the perchlorate in the product does not react with the compound, and a small amount of acid generated by the reaction is added with 50 percent KOH to adjust the pH value of the solution to be 8. Cooling and crystallizing the solution, drying and crushing the product, and detecting that the chlorate content is 0.002%. The treated solution is used as circulating mother liquor and returned to the electrolytic bath.
Claims (1)
1. A process for removing chlorate from perchlorate features that the pyrosulfite solution or solid with same cation is added according to the content of chlorate in potassium perchlorate or sodium perchlorate to make it react with chlorate to decompose chlorate to become water-soluble compound, and the perchlorate in product does not react with said compound, and the small amount of acid generated by reaction is neutralized by alkali to pH 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03118008 CN1215971C (en) | 2003-01-06 | 2003-01-06 | Refining method for removing chlorate from perchlorate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03118008 CN1215971C (en) | 2003-01-06 | 2003-01-06 | Refining method for removing chlorate from perchlorate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1515487A CN1515487A (en) | 2004-07-28 |
| CN1215971C true CN1215971C (en) | 2005-08-24 |
Family
ID=34239488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03118008 Expired - Fee Related CN1215971C (en) | 2003-01-06 | 2003-01-06 | Refining method for removing chlorate from perchlorate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1215971C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634813B (en) * | 2012-03-19 | 2015-09-23 | 山东东岳氟硅材料有限公司 | Improve the method for oxymuriate decomposition efficiency |
| CN104860335A (en) * | 2015-05-07 | 2015-08-26 | 芜湖融汇化工有限公司 | Refining method for removing chlorate from salt water |
| CN106011928B (en) * | 2016-05-27 | 2018-11-02 | 江苏索普化工股份有限公司 | The removal methods of chlorate in Membrane Used In Chlor-alkali Cell production |
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2003
- 2003-01-06 CN CN 03118008 patent/CN1215971C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1515487A (en) | 2004-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050824 Termination date: 20110106 |