CN115196600A - Novel sodium hypochlorite production process - Google Patents
Novel sodium hypochlorite production process Download PDFInfo
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- CN115196600A CN115196600A CN202110385632.4A CN202110385632A CN115196600A CN 115196600 A CN115196600 A CN 115196600A CN 202110385632 A CN202110385632 A CN 202110385632A CN 115196600 A CN115196600 A CN 115196600A
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- China
- Prior art keywords
- sodium hypochlorite
- reaction
- caustic soda
- reaction tank
- chlorine
- Prior art date
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- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000005708 Sodium hypochlorite Substances 0.000 title claims abstract description 84
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 84
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 28
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000460 chlorine Substances 0.000 claims abstract description 23
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 23
- 239000000047 product Substances 0.000 claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims abstract description 6
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000005660 chlorination reaction Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000013589 supplement Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 239000012295 chemical reaction liquid Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 description 9
- 238000004659 sterilization and disinfection Methods 0.000 description 8
- 230000001954 sterilising effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 241000588724 Escherichia coli Species 0.000 description 2
- 241000235342 Saccharomycetes Species 0.000 description 2
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- ISAOUZVKYLHALD-UHFFFAOYSA-N 1-chloro-1,3,5-triazinane-2,4,6-trione Chemical compound ClN1C(=O)NC(=O)NC1=O ISAOUZVKYLHALD-UHFFFAOYSA-N 0.000 description 1
- 239000004156 Azodicarbonamide Substances 0.000 description 1
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 1
- 235000019399 azodicarbonamide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000012320 chlorinating reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/04—Hypochlorous acid
- C01B11/06—Hypochlorites
- C01B11/062—Hypochlorites of alkali metals
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
The invention discloses a novel production process of sodium hypochlorite, which comprises the following steps: s1: placing the liquid caustic soda in a reaction tank to enable the liquid caustic soda to be in a low-temperature state; s2: introducing chlorine into the solution in the reaction tank, and chlorinating liquid caustic soda in the reaction tank to obtain sodium hypochlorite; s3: cooling the sodium hypochlorite solution by a cooler, introducing the condensed product into a filler absorption tower, adding chlorine into the filler absorption tower, and reacting at the temperature of 10-30 ℃ to obtain a sodium hypochlorite solution with the effective chlorine of the reaction product of 9-10.5%; s4: the cooled sodium hypochlorite is stored in a plurality of sodium hypochlorite storage tanks and is conveyed to each point of use of the sodium hypochlorite solution. The production process of the novel sodium hypochlorite. The staff working strength is reduced, the yield is improved, the quality stability of products is improved, the flow speed reducing device is arranged, the speed of liquid flowing can be reduced under the condition that the flow speed is high, real-time monitoring is achieved, and the accuracy of detection is improved.
Description
Technical Field
The invention relates to the technical field of sodium hypochlorite preparation, in particular to a novel production process of sodium hypochlorite.
Background
Sodium hypochlorite is a multipurpose and multifunctional chemical product, can be used for disinfection and sterilization, can be used as a bleaching agent in textile and paper industry, and can be used as a chlorinating agent in the production of organic chemical products to synthesize hydrazine hydrate, azodicarbonamide and chloroisocyanuric acid through oxidation. With the continuous development of urban construction in China, the urban water supply system increasingly adopts a sodium hypochlorite disinfection and sterilization process to replace a chlorine disinfection and sterilization process, and higher requirements on the large-scale and high-quality production of sodium hypochlorite are raised. The demand and quality requirements of China for sodium hypochlorite determine that the production technology of sodium hypochlorite must have low energy consumption, high efficiency, high quality and continuous functions.
With the technological innovation and the gradual enhancement of environmental protection consciousness of people, the preparation process of chemical production raw materials such as sodium hypochlorite and the like is gradually more reasonable, the sodium hypochlorite is an important production raw material and is widely applied to industries such as papermaking, spinning, light industry, tap water treatment and the like, and the sodium hypochlorite is an inorganic substance, has a chemical formula of NaClO, is a hypochlorite and is the most common chlorine bleaching agent in household washing.
According to the national conditions of China and the aims of building a resource-saving and environment-friendly society, the preparation technology of sodium hypochlorite is determined to have the characteristics of low energy consumption, high efficiency and high quality, the capacity can meet the requirements of various industries, and the sodium hypochlorite is a strong oxidant, so that the stability of a finished product is poor, and the chemical property is easy to decompose, so that the production technology of the novel sodium hypochlorite is improved.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a novel production process of sodium hypochlorite, which comprises the following steps:
s1: placing the liquid caustic soda in a reaction tank to enable the liquid caustic soda to be in a low-temperature state;
s2: introducing chlorine into the solution in the reaction tank, and chlorinating the liquid alkali in the reaction tank to obtain sodium hypochlorite;
s3: cooling the sodium hypochlorite solution by a cooler, introducing the condensed product into a filler absorption tower, adding chlorine into the filler absorption tower, and reacting at the temperature of 10-30 ℃ to obtain a sodium hypochlorite solution with the effective chlorine of the reaction product of 9-10.5%;
s4: the cooled sodium hypochlorite is stored in a plurality of sodium hypochlorite storage tanks and is conveyed to each point of use of the sodium hypochlorite solution.
As a preferable technical solution of the present invention, in S1, the caustic soda liquid is one of sodium carbonate and sodium hydroxide.
In a preferred embodiment of the present invention, in S2, the reaction temperature in the reaction tank should be 20 to 30 ℃, and the maximum reaction temperature should not exceed 35 ℃.
In a preferred embodiment of the present invention, in S2, when chlorination is performed in a reaction tank, the pressure of the reaction tank should be controlled to 2 to 2.67kPa, and if necessary, the chlorination may be performed in vacuum, and during the chlorination reaction, the concentration of sodium hypochlorite is detected by an online ORP detector, and a potentiometer is controlled to 500 to 600mv.
In a preferable technical scheme of the invention, in the S2, the effective chlorine value is controlled to be more than 10.5; when the liquid level in the sodium hypochlorite circulating tank exceeds the specified liquid level, the bypass pipeline of the sodium hypochlorite circulating pump is opened, the sodium hypochlorite is conveyed outwards to be qualified, the PH value of the reaction liquid of the sodium hypochlorite is controlled between 11 and 13.5, and the reaction effect is optimal.
As a preferable technical scheme of the invention, a chlorine buffer tank is arranged between the chlorine pipeline and the sodium hypochlorite reaction tower.
As a preferred technical scheme of the invention, the reaction tank is provided with a liquid caustic soda supplement pipe which is respectively communicated with a liquid caustic soda pipeline and a pure water pipeline through a static mixer, the liquid caustic soda pipeline is provided with a liquid caustic soda control valve, and the pure water pipeline is provided with a pure water control valve.
The invention has the beneficial effects that: according to the novel production process of the sodium hypochlorite, the product sodium hypochlorite is monitored on line through an online detector, and an analyst does not need to analyze and monitor in real time. The working strength of workers is reduced, the yield is improved, the quality stability of products is improved, the flow speed reducing device is arranged, the liquid flowing speed of the system can be reduced under the condition of high flowing speed, real-time monitoring is achieved, the detection accuracy is improved, the sodium hypochlorite produced by the system meets the product quality requirement, and the sodium hypochlorite production has the advantages of high yield, high quality, continuity and the like;
the pH value is 11-13.5, the sterilization effect on escherichia coli, staphylococcus aureus and saccharomycetes is obvious, the average killing rate is more than 99%, the preparation process is convenient and simple to operate, the effectiveness and the durability of the product can be maintained, the preparation process has practical significance on the production, the sale, the actual storage, the use and the operation of the product, the continuous and stable production of sodium hypochlorite can be realized, the tail gas can be fully purified and absorbed, and the energy conservation and the environmental protection are good;
can effective control chlorination temperature for the sodium hypochlorite steady quality that the preparation obtained provides effective guarantee for the continuous large-scale production accords with the sodium hypochlorite of first-class quality, follows scientific requirement, makes production sodium hypochlorite more stable, satisfies the demand of each trade.
Drawings
FIG. 1 is a flow chart of a process for the production of a novel sodium hypochlorite of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
Example (b): as shown in figure 1, the production process of the novel sodium hypochlorite comprises the following steps:
s1: placing the liquid caustic soda in a reaction tank to enable the liquid caustic soda to be in a low-temperature state;
s2: introducing chlorine into the solution in the reaction tank, and chlorinating liquid caustic soda in the reaction tank to obtain sodium hypochlorite;
s3: cooling the sodium hypochlorite solution by a cooler, introducing the condensed product into a filler absorption tower, adding chlorine into the filler absorption tower, and reacting at the temperature of 10-30 ℃ to obtain a sodium hypochlorite solution with the effective chlorine of the reaction product of 9-10.5%;
s4: the cooled sodium hypochlorite is stored in a plurality of sodium hypochlorite storage tanks and is conveyed to each point of use of the sodium hypochlorite solution.
Wherein, in S1, the liquid alkali is one of sodium carbonate and sodium hydroxide.
In S2, the reaction temperature in the reaction tank is 20-30 ℃, and the highest reaction temperature is not more than 35 ℃.
Wherein, in S2, when chlorination is carried out in the reaction tank, the pressure of the reaction tank is controlled to be 2-2.67 kPa, and if necessary, the chlorination can be carried out in vacuum, during the chlorination reaction, the concentration of sodium hypochlorite is detected by an online ORP detector, and a potentiometer is controlled to be 500-600 mv.
Wherein in S2, the effective chlorine value is controlled to be more than 10.5; when the liquid level in the sodium hypochlorite circulating tank exceeds the specified liquid level, the bypass pipeline of the sodium hypochlorite circulating pump is opened, the sodium hypochlorite is conveyed outwards to be qualified, the PH value of the reaction liquid of the sodium hypochlorite is controlled between 11 and 13.5, and the reaction effect is optimal.
Wherein, a chlorine buffer tank is arranged between the chlorine pipeline and the sodium hypochlorite reaction tower.
The reaction tank is provided with a liquid caustic soda supplement pipe, the liquid caustic soda supplement pipe is respectively communicated with a liquid caustic soda pipeline and a pure water pipeline through a static mixer, the liquid caustic soda pipeline is provided with a liquid caustic soda control valve, and the pure water pipeline is provided with a pure water control valve.
The working principle is as follows: the sodium hypochlorite product is monitored on line by an on-line detector, and does not need to be analyzed and monitored by an analyst in real time. The working strength of workers is reduced, the yield is improved, the quality stability of products is improved, the flow speed reducing device is arranged, the liquid flowing speed of the system can be reduced under the condition of high flowing speed, real-time monitoring is achieved, the detection accuracy is improved, the sodium hypochlorite produced by the system meets the product quality requirement, and the sodium hypochlorite production has the advantages of high yield, high quality, continuity and the like;
the pH value is 11-13.5, the sterilization effect on escherichia coli, staphylococcus aureus and saccharomycetes is obvious, the average killing rate is more than 99%, the preparation process is convenient and simple to operate, the effectiveness and the durability of the product can be maintained, the preparation process has practical significance on the production, the sale, the actual storage, the use and the operation of the product, the continuous and stable production of sodium hypochlorite can be realized, the tail gas can be fully purified and absorbed, and the energy conservation and the environmental protection are good;
can effective control chlorination temperature for the sodium hypochlorite steady quality that the preparation obtained provides effective guarantee for the continuous large-scale production accords with the sodium hypochlorite of first-class quality, follows scientific requirement, makes production sodium hypochlorite more stable, satisfies the demand of each trade.
Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A production process of novel sodium hypochlorite is characterized by comprising the following steps:
s1: placing the liquid caustic soda in a reaction tank to enable the liquid caustic soda to be in a low-temperature state;
s2: introducing chlorine into the solution in the reaction tank, and chlorinating the liquid alkali in the reaction tank to obtain sodium hypochlorite;
s3: cooling the sodium hypochlorite solution by a cooler, introducing the condensed product into a filler absorption tower, adding chlorine into the filler absorption tower, and reacting at the temperature of 10-30 ℃ to obtain a sodium hypochlorite solution with the effective chlorine of the reaction product of 9-10.5%;
s4: the cooled sodium hypochlorite is stored in a plurality of sodium hypochlorite storage tanks and is conveyed to each point of use of the sodium hypochlorite solution.
2. The process for producing sodium hypochlorite according to claim 1, wherein the liquid alkali in S1 is one of sodium carbonate and sodium hydroxide.
3. The process for producing sodium hypochlorite according to claim 1, wherein in the step S2, the reaction temperature in the reaction tank is between 20 and 30 ℃, and the maximum reaction temperature is not higher than 35 ℃.
4. The process for producing sodium hypochlorite according to claim 1, wherein in the step S2, when chlorination is carried out in the reaction tank, the pressure of the reaction tank is controlled to be 2-2.67 kPa, and if necessary, the chlorination can be carried out in vacuum, and during the chlorination reaction, the concentration of sodium hypochlorite is detected by an online ORP detector, and the potentiometer is controlled to be 500-600 mv.
5. The process for producing sodium hypochlorite according to claim 1, wherein in the S2, the available chlorine value is controlled to be 10.5 or more; when the liquid level in the sodium hypochlorite circulating tank exceeds the specified liquid level, the bypass pipeline of the sodium hypochlorite circulating pump is opened, the sodium hypochlorite is conveyed outwards to be qualified, the PH value of the reaction liquid of the sodium hypochlorite is controlled between 11 and 13.5, and the reaction effect is optimal.
6. The process for producing sodium hypochlorite as claimed in claim 1, wherein a chlorine buffer tank is arranged between the chlorine pipeline and the sodium hypochlorite reaction tower.
7. The process for producing sodium hypochlorite according to claim 1, wherein the reaction tank is provided with a liquid caustic soda supplement pipe, the liquid caustic soda supplement pipe is respectively communicated with a liquid caustic soda pipeline and a pure water pipeline through a static mixer, the liquid caustic soda pipeline is provided with a liquid caustic soda control valve, and the pure water pipeline is provided with a pure water control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385632.4A CN115196600A (en) | 2021-04-10 | 2021-04-10 | Novel sodium hypochlorite production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385632.4A CN115196600A (en) | 2021-04-10 | 2021-04-10 | Novel sodium hypochlorite production process |
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| Publication Number | Publication Date |
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| CN115196600A true CN115196600A (en) | 2022-10-18 |
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| CN202110385632.4A Pending CN115196600A (en) | 2021-04-10 | 2021-04-10 | Novel sodium hypochlorite production process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491276A (en) * | 2011-11-24 | 2012-06-13 | 泸州北方化学工业有限公司 | Method for producing sodium hypochlorite through adding alkali twice |
| CN105197892A (en) * | 2015-09-21 | 2015-12-30 | 宁波镇洋化工发展有限公司 | Novel production process of sodium hypochlorite |
| CN110255504A (en) * | 2019-07-10 | 2019-09-20 | 杭州中昊科技有限公司 | The system and technique of tower continuity method production sodium hypochlorite |
| CN210366984U (en) * | 2019-07-10 | 2020-04-21 | 杭州中昊科技有限公司 | System for tower continuous method production sodium hypochlorite |
| CN212101988U (en) * | 2020-04-26 | 2020-12-08 | 湖北可赛化工有限公司 | Improved generation sodium hypochlorite production on-line control system |
-
2021
- 2021-04-10 CN CN202110385632.4A patent/CN115196600A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491276A (en) * | 2011-11-24 | 2012-06-13 | 泸州北方化学工业有限公司 | Method for producing sodium hypochlorite through adding alkali twice |
| CN105197892A (en) * | 2015-09-21 | 2015-12-30 | 宁波镇洋化工发展有限公司 | Novel production process of sodium hypochlorite |
| CN110255504A (en) * | 2019-07-10 | 2019-09-20 | 杭州中昊科技有限公司 | The system and technique of tower continuity method production sodium hypochlorite |
| CN210366984U (en) * | 2019-07-10 | 2020-04-21 | 杭州中昊科技有限公司 | System for tower continuous method production sodium hypochlorite |
| CN212101988U (en) * | 2020-04-26 | 2020-12-08 | 湖北可赛化工有限公司 | Improved generation sodium hypochlorite production on-line control system |
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Application publication date: 20221018 |