CN102502508A - Method for preventing invalid reaction in process of preparing chlorine dioxide with sodium chlorate reduction method - Google Patents
Method for preventing invalid reaction in process of preparing chlorine dioxide with sodium chlorate reduction method Download PDFInfo
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- CN102502508A CN102502508A CN2011103452295A CN201110345229A CN102502508A CN 102502508 A CN102502508 A CN 102502508A CN 2011103452295 A CN2011103452295 A CN 2011103452295A CN 201110345229 A CN201110345229 A CN 201110345229A CN 102502508 A CN102502508 A CN 102502508A
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- reaction
- acidity
- reduction method
- chlorine dioxide
- sodium chlorate
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a method for preventing an invalid reaction in a process of preparing chlorine dioxide with a sodium chlorate reduction method. The method comprises the following steps of: before the reaction, adding methanol until adjusting the acidity to at least be up to 3.5 mol/L and simultaneously maintaining the acidity of a reaction solution to be not lower than 3.5 mo/L until the reaction is finished; and meanwhile, controlling the acidity to be not more than 7 mol/L before a solid is formed, so as to avoid the invalid reaction. When the solid appears, the acidity can be improved to a normal value of 8.0-8.2 mol/L. According to the invention, by controlling the acidity of the reaction through using sulfuric acid, the invalid reaction can be better prevented and the reaction efficiency can be improved.
Description
Technical field
The present invention relates to a kind of method that prevents invalid chemical reaction, be specifically related to a kind of VAL-DROP reduction method that prevents and prepare the method for dioxide peroxide system abortive response.
Background technology
The VAL-DROP reduction method prepares dioxide peroxide, and mainly to use pure VAL-DROP, methyl alcohol and sulphuric acid soln be raw material; Under acidic conditions, make reductive agent generation dioxide peroxide with methyl alcohol; Refrigerated water absorption through with 7 ℃ makes Chlorine Dioxide Steady Liquor, and the flow of regulating refrigerated water is to obtain the ClO of desired concn (8-10g/L)
2Solution.System's tail gas send washs the ClO that washes in the tower washing and recycling tail gas
2After enter atmosphere.This method principal reaction formula: 6NaClO
3+ 4H
2SO
4+ CH
3OH → 6ClO
2+ 5H
2O+2Na
3H (SO
4)
2+ CO
2↑.
The characteristics of present method are that technical process is simple, throughput and reaction efficiency is high, raw material consumption is low, technical maturity, processing ease, change of production flexibility are big, be easy to regulate, ClO
2Purity is high, contains chlorine hardly.Adopt reduction method to prepare ClO
2The sub product saltcake that is produced can use in inside plants, reaches the equilibrium of supply and demand basically, compares the discharging that has reduced pollutent with other method.
But when utilizing the VAL-DROP reduction method to prepare dioxide peroxide,, then possibly cause to produce ClO if the additional proportion of several kinds of material compositions is improper
2Product.As because acidity is too high, can cause the generation of abortive response.
Summary of the invention
The object of the present invention is to provide a kind of method of abortive response when preventing that the VAL-DROP reduction method from preparing dioxide peroxide.
The present invention is achieved in that
Prevent the method for abortive response when the VAL-DROP reduction method prepares dioxide peroxide; Be before reaction; Regulate acidity
and begin to add methyl alcohol when reaching 3.5mol/L at least; To keep adding the vitriolic flow simultaneously; The acidity
of keeping reaction solution is not less than 3.5mol/L and stops until reaction; Simultaneously before solid forms; Want controlling acidity
to be not more than 7mol/L; To avoid occurring abortive response, after solid occurs, just can improve acidity
and reach normal 8.0～8.2mol/L.
The present invention carries out acidity control through using sulfuric acid to reaction, can prevent the generation of abortive response well, and can improve reaction efficiency.
Embodiment
Prevent the method for abortive response when the VAL-DROP reduction method prepares dioxide peroxide; Be before reaction; Regulate acidity
and begin to add methyl alcohol when reaching 3.5mol/L at least; To keep adding the vitriolic flow simultaneously; The acidity
of keeping reaction solution is not less than 3.5mol/L and stops until reaction; Simultaneously before solid forms; Want controlling acidity
to be not more than 7mol/L; To avoid occurring abortive response, after solid occurs, just can improve acidity
and reach normal 8.0～8.2mol/L.
Claims (1)
1. the method for an abortive response when preventing that the VAL-DROP reduction method from preparing dioxide peroxide; It is characterized in that: before reaction; Regulate acidity
and begin to add methyl alcohol when reaching 3.5mol/L at least; Keep adding the vitriolic flow simultaneously; The acidity
of keeping reaction solution is not less than 3.5mol/L and stops until reaction; Before solid forms; Controlling acidity
is not more than 7mol/L simultaneously, back raising acidity
occurs as solid and reaches normal 8.0～8.2mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103452295A CN102502508A (en) | 2011-11-04 | 2011-11-04 | Method for preventing invalid reaction in process of preparing chlorine dioxide with sodium chlorate reduction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103452295A CN102502508A (en) | 2011-11-04 | 2011-11-04 | Method for preventing invalid reaction in process of preparing chlorine dioxide with sodium chlorate reduction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102502508A true CN102502508A (en) | 2012-06-20 |
Family
ID=46214659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103452295A Pending CN102502508A (en) | 2011-11-04 | 2011-11-04 | Method for preventing invalid reaction in process of preparing chlorine dioxide with sodium chlorate reduction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102502508A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067224A (en) * | 1991-04-22 | 1992-12-23 | 田纳科加拿大分公司 | The metathesis of the acidic by-products of chlorine dioxide production technology |
-
2011
- 2011-11-04 CN CN2011103452295A patent/CN102502508A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067224A (en) * | 1991-04-22 | 1992-12-23 | 田纳科加拿大分公司 | The metathesis of the acidic by-products of chlorine dioxide production technology |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120620 |