CN109336136A - The method for decomposing sodium hypochlorite - Google Patents
The method for decomposing sodium hypochlorite Download PDFInfo
- Publication number
- CN109336136A CN109336136A CN201811506597.1A CN201811506597A CN109336136A CN 109336136 A CN109336136 A CN 109336136A CN 201811506597 A CN201811506597 A CN 201811506597A CN 109336136 A CN109336136 A CN 109336136A
- Authority
- CN
- China
- Prior art keywords
- sodium hypochlorite
- decomposing
- chlorine
- chlor
- liquor natrii
- 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
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention belongs to chlor-alkali production fields, and in particular to a method of decompose sodium hypochlorite.Technical problem to be solved by the invention is to provide a kind of methods for decomposing sodium hypochlorite, comprising the following steps: hydrochloric acid regulation system pH is added into liquor natrii hypochloritis and reacts for 1~2.The method of the present invention can effectively decompose sodium hypochlorite, and resolution ratio is up to 99%.
Description
Technical field
The invention belongs to chlor-alkali production fields, and in particular to a method of decompose sodium hypochlorite, in particular to a kind of chlorine
The recovery method for the sodium hypochlorite that exhaust system generates in alkali production process.
Background technique
Sodium hypochlorite is widely used, is mainly used for bleaching, Industrial Wastewater Treatment, papermaking, weaving, pharmacy, fine chemistry industry, defends
The various fields such as raw disinfection.Such as it can be used as water purification agent, disinfectant, fungicide in water treatment field；It is used in paper and textile industry
In paper pulp bleaching, fiber decoloration, deodorization, sterilization.
It during chlor-alkali production, needs to absorb the waste chlorine of each process using 17% or so sodium hydroxide, absorbs full
The sodium hypochlorite of effective chlorine 10% or so will be generated with after.So liquor natrii hypochloritis can be used as the byproduct of chlor-alkali industry
It is sold.But since regional factor restricts, liquor natrii hypochloritis has no the market demand in certain areas；And sodium hypochlorite
As a kind of hazardous chemical, can not arbitrarily discharge.
It is, thus, sought for a kind of sodium hypochlorite processing method rationally, effectively, economic, environmentally friendly, in order to avoid influence chlor-alkali enterprise
The positive generation of industry produces.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of methods for decomposing sodium hypochlorite.This method includes following step
It is rapid: hydrochloric acid regulation system pH is added into liquor natrii hypochloritis and is reacted for 1~2.
Further, it in the method for above-mentioned decomposition sodium hypochlorite, reacts generated chlorine and enters in electrolytic chlorine gas general pipeline
It is further processed.
Further, in the method for above-mentioned decomposition sodium hypochlorite, it is next that solution caused by reaction enters dechlorinator's progress
Step processing.
Preferably, in the method for above-mentioned decomposition sodium hypochlorite, the pH is 1.5.
Specifically, the mass concentration of the hydrochloric acid is 31% in the method for above-mentioned decomposition sodium hypochlorite.
Specifically, the secondary sodium chloride solution refers to hydrogen during chlor-alkali production in the method for above-mentioned decomposition sodium hypochlorite
Sodium hydroxide solution absorbs liquor natrii hypochloritis caused by waste chlorine.General available chlorine content is 10% or so.
Specifically, the time of the reaction is 1~2h in the method for above-mentioned decomposition sodium hypochlorite.
The present invention decomposes the method resolution ratio of sodium hypochlorite up to 99%.The purity of chlorine gas feeding that the method for the present invention generates exists
98.5% or more, electrolytic chlorine gas general pipeline can be directly entered enter the next step and is handled；Solution after reaction mainly at
It is divided into sodium chloride, content can enter dechlorinator's processing in 200g/L or so together with the light salt brine that electrolytic cell comes out, can't shadow
Original technique is rung, does not have three waste discharge in entire decomposable process, there is apparent economic and social benefit.
Specific embodiment
The method of present invention decomposition sodium hypochlorite, comprising the following steps: the sodium hypochlorite generated during to chlor-alkali production
Hydrochloric acid regulation system pH is added in solution to be reacted for 1~2, reacts generated chlorine and enters in electrolytic chlorine gas general pipeline, with
The chlorine that electrolytic cell comes out enters chlorine general pipeline together, is washed, is dried to come out process into next step chlorine；It reacts
To solution 1~2h is stopped in reactive tank, to increase the reaction time, improve resolution ratio, it is de- to be then sent to chlor-alkali dechlorination process
Chlorine tower is handled.
In the above method, sodium hydroxide solution absorbs waste chlorine institute during the secondary sodium chloride solution refers to chlor-alkali production
The liquor natrii hypochloritis of generation.General available chlorine content is 10% or so.So-called effective chlorine, which refers in chlorine-containing compound, to be aoxidized
The comparable chlorine dose of ability.Chemical industry for making chlorine and alkali absorbs chlorine using sodium hydroxide solution, and naoh concentration is excessively high to will cause stifled tower, dense
It spends low and assimilation effect can be lost quickly, then need to absorb the waste chlorine of each process using 17% or so sodium hydroxide,
Reaction equation is 2NaOH+Cl2=NaCl+NaClO+H2O absorbs the hypochlorous acid that effective chlorine 10% or so will be generated after being saturated
Sodium, effective chlorine then refers to after reaction the content of Cl in NaClO in solution herein.
In the above method, used hydrochloric acid mass percent is 31%.
In the above method, controlling the pH value in reaction process is 1.5.
It in the above method, if pH is too low, then can corrode equipment and pipeline, if pH is excessively high, then will affect sodium hypochlorite point again
Solution, causes resolution ratio to decline to a great extent, so needing control system pH is 1~2.
Key reaction of the present invention is as follows:
NaClO+2HCl→NaCl+Cl2+H2O
Embodiment
Certain chlor-alkali enterprises can generate the liquor natrii hypochloritis 100 containing effective chlorine 10% every month in normal productive process
Ton or so, and sodium hypochlorite is in the chlor-alkali region and sales resistance.Therefore need to find a kind of reasonable sodium hypochlorite processing approach, with
Exempt from the normal production of restriction chlor-alkali.
Using the method for the present invention, existing chlorate decomposing system resolution process liquor natrii hypochloritis is utilized:
Step 1: whether the valvular switch state of confirmation institute is correct, and manually-operated gate is opened before and after regulating valve, and regulating valve is closed
It closes, bypass valve is closed.
Step 2: the valve of confirmation decomposer to chlorine general pipeline is closed, and opens the valve of decomposer to useless chlorine pipeline.
Step 3: starting hypochlorous acid sodium pump controls sodium hypochlorite flow in 2m by regulating valve3/hr。
Step 4: starting hydrochloric acid pump controls hydrochloric acid additional amount by regulating valve, is subject to and controls online pH meter 1.5 or so
(hydrochloric acid reacts in pipe-line mixer with sodium hypochlorite, flows into decomposer by pipeline after reaction, and online pH is provided on pipeline
Meter).
Step 5: after sodium hypochlorite flow and pH stable, closing the valve for removing waste chlorine pipeline, the pressure of slot to be decomposed
After reaching 25kPa, the valve for removing chlorine general pipeline is slowly opened, chlorine is incorporated to electrolytic chlorine gas general pipeline, to enter the next step
It is handled.
Step 6: when decomposer liquid level reaches 60%, starting transfering material pump, reactive tank is controlled by the regulating valve of pump discharge
Level stability between 60%~65%, the liquid for turning sodium chloride-containing by transfering material pump comes out to dechlorinator with electrolytic cell
Light salt brine handled together, the salt water after processing is qualified returns primary brine salt dissolving and uses.
Interpretation of result: using the chlorate decomposing system of certain chlor-alkali enterprises, the resolution ratio of sodium hypochlorite can reach 99% with
On, for the purity of chlorine gas feeding of generation up to 98.5% or more, the sodium chloride solution of generation can enter dechlorination system, accomplish chlorine and salt water
Complete recycling, three-waste free discharge, and no longer restrict the normal production of certain chlor-alkali enterprises has preferable economic benefit and society
Benefit.
Claims (9)
1. the method for decomposing sodium hypochlorite, it is characterised in that: adjusted the following steps are included: hydrochloric acid is added into liquor natrii hypochloritis
System pH is reacted for 1~2.
2. the method according to claim 1 for decomposing sodium hypochlorite, it is characterised in that: chlorine caused by reacting enters electricity
It is further processed in solution chlorine general pipeline.
3. it is according to claim 1 or 2 decompose sodium hypochlorite method, it is characterised in that: react caused by solution into
Enter dechlorinator to be further processed.
4. described in any item methods for decomposing sodium hypochlorite according to claim 1~3, it is characterised in that: the pH is 1.5.
5. the method according to any one of claims 1 to 4 for decomposing sodium hypochlorite, it is characterised in that: the matter of the hydrochloric acid
Measuring concentration is 31%.
6. described in any item methods for decomposing sodium hypochlorite according to claim 1~5, it is characterised in that: the secondary sodium chloride
Sodium hydroxide solution absorbs liquor natrii hypochloritis caused by waste chlorine during solution refers to chlor-alkali production.
7. the method according to claim 6 for decomposing sodium hypochlorite, it is characterised in that: the liquor natrii hypochloritis's is effective
Chlorinity is 10%.
8. according to claim 1~7 it is described in any item decompose sodium hypochlorite methods, it is characterised in that: the reaction when
Between be 1~2h.
9. described in any item methods for decomposing sodium hypochlorite according to claim 1~8, it is characterised in that: the reaction uses
The chlorate decomposing system of chlor-alkali enterprises carries out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811506597.1A CN109336136A (en) | 2018-12-10 | 2018-12-10 | The method for decomposing sodium hypochlorite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811506597.1A CN109336136A (en) | 2018-12-10 | 2018-12-10 | The method for decomposing sodium hypochlorite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109336136A true CN109336136A (en) | 2019-02-15 |
Family
ID=65303613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811506597.1A Pending CN109336136A (en) | 2018-12-10 | 2018-12-10 | The method for decomposing sodium hypochlorite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109336136A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110921631A (en) * | 2019-11-27 | 2020-03-27 | 石河子天域新实化工有限公司 | Process method for preparing sodium hypochlorite from waste sulfuric acid residual chlorine |
| CN113860332A (en) * | 2021-07-20 | 2021-12-31 | 乳源东阳光电化厂 | Recycling method of sodium hypochlorite-containing waste liquid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4405465A (en) * | 1982-06-30 | 1983-09-20 | Olin Corporation | Process for the removal of chlorate and hypochlorite from spent alkali metal chloride brines |
| CN101342449A (en) * | 2008-08-27 | 2009-01-14 | 攀钢集团钛业有限责任公司 | Comprehensive recovery method for chlorine containing waste gas |
| CN101704736A (en) * | 2009-10-30 | 2010-05-12 | 黄再新 | Emergency treatment method of chlorine effusion during producing beta-hydroxyl-beta-methyl butyric acid |
| CN201905020U (en) * | 2010-11-02 | 2011-07-27 | 江苏省农业科学院 | Seed sterilizer based on chlorine disinfection |
| CN108552060A (en) * | 2018-07-19 | 2018-09-21 | 江苏徐淮地区徐州农业科学研究所(江苏徐州甘薯研究中心) | The sterilizing methods of sweet potato tissue cultures explant |
-
2018
- 2018-12-10 CN CN201811506597.1A patent/CN109336136A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4405465A (en) * | 1982-06-30 | 1983-09-20 | Olin Corporation | Process for the removal of chlorate and hypochlorite from spent alkali metal chloride brines |
| CN101342449A (en) * | 2008-08-27 | 2009-01-14 | 攀钢集团钛业有限责任公司 | Comprehensive recovery method for chlorine containing waste gas |
| CN101704736A (en) * | 2009-10-30 | 2010-05-12 | 黄再新 | Emergency treatment method of chlorine effusion during producing beta-hydroxyl-beta-methyl butyric acid |
| CN201905020U (en) * | 2010-11-02 | 2011-07-27 | 江苏省农业科学院 | Seed sterilizer based on chlorine disinfection |
| CN108552060A (en) * | 2018-07-19 | 2018-09-21 | 江苏徐淮地区徐州农业科学研究所(江苏徐州甘薯研究中心) | The sterilizing methods of sweet potato tissue cultures explant |
Non-Patent Citations (1)
| Title |
|---|
| 董敬芳等: "《无机化学 上册》", 31 December 1985, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110921631A (en) * | 2019-11-27 | 2020-03-27 | 石河子天域新实化工有限公司 | Process method for preparing sodium hypochlorite from waste sulfuric acid residual chlorine |
| CN113860332A (en) * | 2021-07-20 | 2021-12-31 | 乳源东阳光电化厂 | Recycling method of sodium hypochlorite-containing waste liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205710043U (en) | The decontaminating apparatus of electrolytic sodium chloride | |
| CN109336136A (en) | The method for decomposing sodium hypochlorite | |
| AU2009328258B2 (en) | Process for producing chlorine, caustic soda, and hydrogen | |
| US3920801A (en) | Method of producing chlorine dioxide from hydrogen chloride | |
| CN114984735A (en) | Treatment method for chlorine absorption by sodium hydroxide solution | |
| CN101570866A (en) | Method for removing ammonium from alkali production by full brine ion-exchange membrane electrolysis | |
| PL160948B1 (en) | Method of obtaining chlorine dioxide and sodium hydroxide | |
| US3801480A (en) | Process for reducing losses of mercury in the alkali metal chloride electrolysis according to the amalgamation process | |
| CN114293207A (en) | System and method for decomposing chlorate in caustic soda production by ion-exchange membrane method | |
| KR102449982B1 (en) | A method for treating a ballast water | |
| CN214990827U (en) | Ammonium removal system for chlor-alkali industry | |
| CN108505060A (en) | Method is prepared in situ in a kind of salinity control type hypochlorite | |
| JP4828474B2 (en) | Salt water purification equipment | |
| EP2830999B1 (en) | Method and apparatus for the treatment of effluents from production plants of epoxy compounds | |
| WO2019234665A1 (en) | Industrial process for the production of a koh-based product substantially free from chlorate ions | |
| JP2007051318A (en) | Apparatus for electrolyzing saline solution | |
| KR20230099318A (en) | Method for manufacturing of sodium hypochlorite and apparaus for manufacturing of sodium hypochlorite | |
| Bommaraju | Sodium hypochlorite: its application and stability in bleaching | |
| CA2779397A1 (en) | Process for the production of chlorine dioxide | |
| O’Brien | Salt, Chlor-Alkali, and Related Heavy Chemicals | |
| CN107881527A (en) | The decomposition method of chlorate and the system using this method in a kind of ion film caustic soda | |
| WO2022254878A1 (en) | Method and apparatus for producing sodium hypochlorite solution | |
| CN116065194A (en) | Method for decomposing chlorate in chlor-alkali ion membrane dilute brine | |
| CN113860332A (en) | Recycling method of sodium hypochlorite-containing waste liquid | |
| CN107190278B (en) | A kind of processing method of chlorate in electrolytic cell light salt brine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190215 |
|
| RJ01 | Rejection of invention patent application after publication |