Production process of sodium hypochlorite disinfectant

Abstract

The invention discloses a production process of a sodium hypochlorite disinfectant, which comprises the following steps: preparing and pretreating raw materials, electrolyzing to generate sodium hypochlorite, concentrating and purifying, stabilizing, filtering and filling, and detecting and recording quality, namely dissolving industrial salt with the purity of at least 99.5% in deionized water, and stirring and heating to promote dissolution; the method comprises the following steps: adding iodized salt into a sodium hypochlorite solution to obtain a uniform solution without iodized salt, concentrating the sodium hypochlorite solution through a multi-stage flash evaporation or vacuum concentration technology, selecting a proper stabilizer to be mixed with the sodium hypochlorite solution, adding a catalyst, and filtering the stabilized sodium hypochlorite solution by using a high-precision filter. By optimizing the raw material preparation and pretreatment steps, the purity and uniformity of the raw materials are improved; by controlling electrolysis conditions, the stability and efficiency of the electrolysis process are ensured; the purity and the stability of the product are improved through the steps of concentration and purification; and through stabilizing treatment, the stability of the sodium hypochlorite is further enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of production technology of hypochlorous acid disinfectant, in particular to a production technology of sodium hypochlorite disinfectant. Background Art

[0002] Sodium hypochlorite disinfectant, a liquid disinfectant with sodium hypochlorite as the main component, can kill intestinal pathogens, pyogenic cocci, pathogenic yeasts, and inactivate viruses. It is often used to disinfect tableware, fruits, general surfaces, and white fabrics. Sodium hypochlorite disinfectant or ozone disinfectant: suitable for medical and health, finance, tourism, restaurants, pharmacies, hotels, shopping malls, schools, kindergartens, food, drug and medical supplies manufacturers, families and office personnel. Sodium hypochlorite solution is often used for disinfection in flood control and disease prevention. Its bactericidal effect is basically the same as bleaching powder. Since sodium hypochlorite also produces hypochlorous acid in water, it is very easy to produce oxygen atoms and chlorine atoms in water, and pathogen proteins are oxidized and partially chlorinated and die. Its disinfection and sterilization effect depends on the effective chlorine content in the solution.

[0003] The existing production process of sodium hypochlorite disinfectant has some problems, such as low raw material purity, unstable electrolysis conditions, poor purification effect, etc., which lead to defects such as unstable product quality, insufficient effective chlorine content or easy decomposition. Therefore, it is necessary to improve the production process of sodium hypochlorite disinfectant to improve the stability and effectiveness of the product. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a production process of sodium hypochlorite disinfectant.

[0005] In order to solve the above problems, the technical solution of the present invention comprises the following steps:

[0006] S1. Raw material preparation and pretreatment: industrial salt with a purity of at least 99.5% is dissolved in deionized water, and the dissolution is promoted by stirring and heating to obtain a uniform non-iodized salt solution;

[0007] S2, electrolysis to generate sodium hypochlorite, the electrolytic cell uses corrosion-resistant and conductive materials to make electrodes, and the electrolysis process is carried out by controlling current density, electrolysis temperature and electrolysis time;

[0008] S3, concentration and purification, the sodium hypochlorite solution is concentrated by multi-stage flash evaporation or vacuum concentration technology, and the heating temperature and evaporation rate are strictly controlled during the concentration process to prevent the decomposition of sodium hypochlorite;

[0009] S4, stabilization treatment, selecting a suitable stabilizer to mix with the sodium hypochlorite solution, and adding a catalyst to accelerate the stabilization reaction to ensure the stability of the sodium hypochlorite;

[0010] S5, Filtration and filling: Use a high-precision filter to filter the stabilized sodium hypochlorite solution, and ensure the sealing of the packaging bottle during the filling process to prevent external contamination;

[0011] S6. Quality inspection and record keeping: Regular quality inspection and record keeping of the sodium hypochlorite solution generated by electrolysis shall be carried out to ensure the consistency and stability of product quality.

[0012] Further, the current density in the electrolysis step S2 to generate sodium hypochlorite is 500A / m 2 , the electrolysis temperature is 40° C., and the electrolysis time is 4 hours.

[0013] Furthermore, in the stabilization treatment of step S4, phosphate is selected as a stabilizer, and the amount of the stabilizer added is 1.5% of the mass of the sodium hypochlorite solution; the catalyst is ammonium sulfate, and the amount of the catalyst added is 5% of the mass of the stabilizer.

[0014] Furthermore, the non-iodized salt solution in the raw material preparation and pretreatment in step S1 is subjected to two-stage filtration, wherein the first filtration uses a 100-mesh filter to remove large particle impurities, and the second filtration uses a 50-micron filter to remove tiny particles.

[0015] Furthermore, the step S6 quality inspection and recording records key indicators such as effective chlorine content and pH value.

[0016] Furthermore, in the step S1, the raw material preparation and pretreatment are dissolved in a mass ratio of salt to deionized water of 1:3, the stirrer is stirred at a speed of 200 revolutions per minute for 30 minutes, and heated at 80°C.

[0017] Furthermore, in step S3, the sodium chlorate solution is concentrated to 1 / 5 of its original volume during concentration and purification, the heating temperature is controlled at 70° C., and the evaporation rate is controlled at 10% of the volume reduction per hour.

[0018] Furthermore, in the filtering and filling step S5, the stabilized sodium hypochlorite solution is filtered using a filter with an accuracy of 0.1 micron, and filled under aseptic conditions, and the capacity of each bottle is 500 ml.

[0019] Furthermore, the flow rate of the electrolyte in the electrolysis to generate sodium hypochlorite in step S2 is controlled at 0.5 meters per second.

[0020] The advantages of the present invention compared with the prior art are:

[0021] 1. The present invention provides a production process of sodium hypochlorite disinfectant, which improves the purity and uniformity of raw materials by optimizing raw material preparation and pretreatment steps; ensures the stability and efficiency of the electrolysis process by controlling electrolysis conditions; improves the purity and stability of the product by concentration and purification steps; further enhances the stability of sodium hypochlorite by stabilization treatment; ensures the purity and safety of the product by filtering and filling steps; and ensures the consistency and stability of product quality by quality testing and recording. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a production process flow chart of the present invention. DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, this embodiment provides a production process of sodium hypochlorite disinfectant, comprising the following steps:

[0027] S1. Raw material preparation and pretreatment: industrial salt with a purity of at least 99.5% is dissolved in deionized water, and the dissolution is promoted by stirring and heating to obtain a uniform non-iodized salt solution;

[0028] S2, electrolysis to generate sodium hypochlorite, the electrolytic cell uses corrosion-resistant and conductive materials to make electrodes, and the electrolysis process is carried out by controlling current density, electrolysis temperature and electrolysis time;

[0029] S3, concentration and purification, the sodium hypochlorite solution is concentrated by multi-stage flash evaporation or vacuum concentration technology, and the heating temperature and evaporation rate are strictly controlled during the concentration process to prevent the decomposition of sodium hypochlorite;

[0030] S4, stabilization treatment, selecting a suitable stabilizer to mix with the sodium hypochlorite solution, and adding a catalyst to accelerate the stabilization reaction to ensure the stability of the sodium hypochlorite;

[0031] S5, Filtration and filling: Use a high-precision filter to filter the stabilized sodium hypochlorite solution, and ensure the sealing of the packaging bottle during the filling process to prevent external contamination;

[0032] S6. Quality inspection and record keeping: Regular quality inspection and record keeping of the sodium hypochlorite solution generated by electrolysis shall be carried out to ensure the consistency and stability of product quality.

[0033] Embodiment 2:

[0034] The solution in Example 1 is further introduced below in combination with a specific working method, as described below:

[0035] Furthermore, in step S3, the sodium chlorate solution is concentrated to 1 / 5 of its original volume during concentration and purification, the heating temperature is controlled at 70° C., and the evaporation rate is controlled at 10% of the volume reduction per hour.

[0036] Furthermore, in step S4, phosphate is selected as a stabilizer in the stabilization treatment, and the amount of the stabilizer added is 1.5% of the mass of the sodium hypochlorite solution; the catalyst is ammonium sulfate, and the amount of the catalyst added is 5% of the mass of the stabilizer.

[0037] Furthermore, in step S3, the sodium chlorate solution is concentrated to 1 / 5 of its original volume during concentration and purification, the heating temperature is controlled at 70° C., and the evaporation rate is controlled at 10% of the volume reduction per hour.

[0038] Furthermore, in step S4, phosphate is selected as a stabilizer in the stabilization treatment, and the amount of the stabilizer added is 1.5% of the mass of the sodium hypochlorite solution; the catalyst is ammonium sulfate, and the amount of the catalyst added is 5% of the mass of the stabilizer.

[0039] Furthermore, in step S5, filtering and filling, the stabilized sodium hypochlorite solution is filtered using a filter with an accuracy of 0.1 micron, and filled under aseptic conditions, with a capacity of 500 ml per bottle.

[0040] Embodiment 3:

[0041] The solution in Example 2 is further introduced below in combination with a specific working method, as described below:

[0042] Furthermore, in step S1, the non-iodized salt solution in the raw material preparation and pretreatment is subjected to two-stage filtration, the first filtration uses a 100-mesh filter to remove large particle impurities, and the second filtration uses a 50-micron filter to remove tiny particles.

[0043] Furthermore, in step S2, the flow rate of the electrolyte in the electrolysis to generate sodium hypochlorite is controlled at 0.5 meters per second.

[0044] Furthermore, key indicators such as effective chlorine content and pH value are recorded in step S6 quality inspection and recording.

[0045] By optimizing the raw material preparation and pretreatment steps, the purity and uniformity of the raw materials are improved; by controlling the electrolysis conditions, the stability and efficiency of the electrolysis process are ensured; through the concentration and purification steps, the purity and stability of the product are improved; through stabilization treatment, the stability of sodium hypochlorite is further enhanced; through the filtration and filling steps, the purity and safety of the product are ensured; through quality testing and record keeping, the consistency and stability of product quality are ensured.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0048] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A production process of sodium hypochlorite disinfectant, characterized in that: The following steps are involved: S1. Raw material preparation and pretreatment: industrial salt with a purity of at least 99.5% is dissolved in deionized water, and the dissolution is promoted by stirring and heating to obtain a uniform non-iodized salt solution; S2, electrolysis to generate sodium hypochlorite, the electrolytic cell uses corrosion-resistant and conductive materials to make electrodes, and the electrolysis process is carried out by controlling current density, electrolysis temperature and electrolysis time; S3, concentration and purification, the sodium hypochlorite solution is concentrated by multi-stage flash evaporation or vacuum concentration technology, and the heating temperature and evaporation rate are strictly controlled during the concentration process to prevent the decomposition of sodium hypochlorite; S4, stabilization treatment, selecting a suitable stabilizer to mix with the sodium hypochlorite solution, and adding a catalyst to accelerate the stabilization reaction to ensure the stability of the sodium hypochlorite; S5, Filtration and filling: Use a high-precision filter to filter the stabilized sodium hypochlorite solution, and ensure the sealing of the packaging bottle during the filling process to prevent external contamination; S6. Quality inspection and record keeping: Regular quality inspection and record keeping of the sodium hypochlorite solution generated by electrolysis shall be carried out to ensure the consistency and stability of product quality.

2. The production process of a sodium hypochlorite disinfectant according to claim 1, characterized in that: In the step S1, the raw materials are prepared and pretreated by dissolving the salt in a mass ratio of 1:3 to deionized water, and the stirrer stirs at a speed of 200 revolutions per minute for 30 minutes and heats at 80°C.

3. The production process of a sodium hypochlorite disinfectant according to claim 1, characterized in that: The current density in step S2 for electrolyzing and generating sodium hypochlorite is 500A / m 2 , the electrolysis temperature is 40° C., and the electrolysis time is 4 hours.

4. The production process of a sodium hypochlorite disinfectant according to claim 1, characterized in that: In step S3, the sodium chlorate solution is concentrated to 1 / 5 of its original volume during concentration and purification, the heating temperature is controlled at 70° C., and the evaporation rate is controlled at 10% of the volume reduction per hour.

5. The production process of a sodium hypochlorite disinfectant according to claim 1, characterized in that: In the stabilization treatment of step S4, phosphate is selected as a stabilizer, and the amount of the stabilizer added is 1.5% of the mass of the sodium hypochlorite solution. The catalyst is ammonium sulfate, and the amount of the catalyst added is 5% of the mass of the stabilizer.

6. The production process of a sodium hypochlorite disinfectant according to claim 1, characterized in that: In the filtering and filling step S5, the stabilized sodium hypochlorite solution is filtered using a filter with an accuracy of 0.1 micron, and filled under aseptic conditions. The capacity of each bottle is 500 ml.

7. The production process of a sodium hypochlorite disinfectant according to claim 1, characterized in that: In the step S1, the non-iodized salt solution in the raw material preparation and pretreatment is subjected to two-stage filtration, wherein the first filtration uses a 100-mesh filter to remove large particle impurities, and the second filtration uses a 50-micron filter to remove tiny particles.

8. The production process of a sodium hypochlorite disinfectant according to claim 1, characterized in that: The flow rate of the electrolyte in the step S2 for electrolyzing and generating sodium hypochlorite is controlled at 0.5 meters per second.

9. The production process of a sodium hypochlorite disinfectant according to claim 1, characterized in that: The step S6 quality inspection and recording records key indicators such as effective chlorine content and pH value.

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