Non-oxidizing bactericides, their preparation methods and applications, and bactericidal treatment methods

Abstract

This invention relates to a non-oxidizing bactericide, its preparation method, application, and sterilization treatment method. The non-oxidizing bactericide comprises the following components: 15%–45% by mass of a plant-modified organic compound; 8%–30% by mass of a complex organic amine or phenol; 5%–20% by mass of an auxiliary film-forming agent and dispersant; and deionized water. The pH of the prepared solution is 4.0–6.5, and the viscosity at room temperature is 20–150 mPa•s. This invention is particularly suitable for use as a non-oxidizing bactericide in circulating water treatment processes, offering high bactericidal efficiency, long-lasting sterilization, and no environmental harm.

Description

Technical Field

[0001] This invention relates to the field of bactericide technology, and in particular to a non-oxidizing bactericide, its preparation method and application, and a bactericidal treatment method. Background Technology

[0002] With the increasing scarcity of water resources and the strain on industrial water use, wastewater reuse has become particularly important. Among these technologies, dual-membrane reuse is currently a hot research and application area. Common dual-membrane systems include desalination systems, wastewater reuse systems, and high-salinity systems. The dual-membrane process combines different membrane technologies, resulting in a compact structure, small footprint, low reagent consumption, stable treatment effects, and safe and reliable operation and management. Applying the dual-membrane method to wastewater reuse can achieve resource conservation and cost reduction, demonstrating significant economic and social benefits.

[0003] However, different water qualities, temperatures, and system environments can all promote microbial growth. Therefore, one of the most effective and commonly used methods to inhibit microbial growth in dual-membrane circulating cooling water systems is the addition of bactericides. Based on the principle of economic practicality, oxidizing bactericides are commonly used. Oxidizing bactericides are usually strong oxidants, primarily achieving sterilization through oxidation reactions with metabolic enzymes within bacteria. However, because the polyamide separation layer of the reverse osmosis membrane element in some dual-membrane systems lacks antioxidant properties, the use of oxidizing bactericides is limited. Consequently, the demand for non-oxidizing bactericides is increasing in the operation of more and more dual-membrane systems, and they account for a significant market share.

[0004] Commonly used non-oxidizing bactericides include quaternary ammonium salts, chlorophenols, organosulfur compounds, organotin compounds, organobromine compounds, isothiazolinones, glutaraldehyde, and quaternary phosphine salts. Non-oxidizing bactericides do not kill microorganisms through oxidation; instead, they act as toxic agents targeting specific sites within the microorganisms, thereby eliminating them. Non-oxidizing bactericides generally exhibit significant advantages such as low resistance development, low toxicity, and minimal environmental impact. However, the bactericidal substances in their formulations, such as bromides, organic amines, and glutaraldehyde, can present challenges during application. These challenges include the high cost of bromides, easy decomposition by peroxides and ozone, and the tendency of glutaraldehyde to react with ammonia or amine compounds, leading to short-lasting bactericidal effects and low bactericidal efficiency in the prepared non-oxidizing bactericides. Summary of the Invention

[0005] Therefore, it is necessary to provide a non-oxidizing bactericide that is particularly suitable for addition during the circulating water treatment process, which has high bactericidal efficiency, long bactericidal duration, and does not cause harm to the environment.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution.

[0007] This invention first provides a non-oxidizing bactericide comprising the following components:

[0008] Plant-derived modified organic compounds with a mass fraction of 15% to 45%;

[0009] Compound organic amines or phenols with a mass fraction of 8% to 30%;

[0010] Auxiliary film-forming agents and dispersants with a mass fraction of 5% to 20%; and,

[0011] Deionized water;

[0012] The pH value of the prepared solution is 4.0~6.5, and the viscosity value at room temperature is 20~150 mPa•s.

[0013] In the above-mentioned non-oxidizing bactericides, the plant-based modified organic compound is at least one of esterified modified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers, and has a molecular weight range of 800-5000 Da.

[0014] In the above-mentioned non-oxidizing bactericides, the compound organic amines or phenols are at least one of dichlorophenol, dioxocyanomethane, isothiazolinone, dodecyl benzyl ammonium chloride, and dodecyl dimethyl benzyl ammonium bromide.

[0015] In the above-mentioned non-oxidizing bactericides, the mass ratio of the plant-modified compound to the complex organic amine or phenol is 1.5 to 3.

[0016] In the above-mentioned non-oxidizing bactericides, the auxiliary film-forming agents and dispersants include nonionic surfactants, metal corrosion inhibitors, and biodegradation promoters.

[0017] The aforementioned non-oxidizing bactericide also contains a composite stabilizer with a mass fraction of 0.5% to 3%, which is composed of BHT, disodium EDTA, and an organosilicon defoamer.

[0018] In the above-mentioned non-oxidizing bactericide, the mass fraction ratio of BHT, disodium EDTA, and organosilicon defoamer is 4:2:1.

[0019] In the above-mentioned non-oxidizing bactericides, the nonionic surfactant has an HLB value of 10-16; the metal corrosion inhibitor is a nanocomposite of sodium molybdate and / or sodium tungstate; and the biodegradation promoter is fatty alcohol polyoxyethylene ether phosphate.

[0020] This invention also provides a method for preparing the above-mentioned non-oxidizing bactericide, comprising the steps of:

[0021] Under nitrogen protection, plant-based modified organic compounds are reacted with complex organic amines or phenols at 60-80°C for 3-5 hours.

[0022] Add the polymer acid solution step by step to adjust the pH of the solution to 4.0~6.5;

[0023] The solution was treated using microjet homogenization technology, with a jet pressure of 150~250 MPa.

[0024] Filter after aging for 24 hours.

[0025] The above method also includes the following steps:

[0026] A compound trehalose preservative was added to prepare a freeze-dried powder.

[0027] The above method also includes the following steps:

[0028] The lyophilized powder is injected into capsules made of chitosan-gelatin composite material to form a microcapsule sustained-release formulation.

[0029] The present invention also provides an application of the above-mentioned non-oxidizing bactericide, namely, adding the non-oxidizing bactericide to an industrial circulating water system at a concentration of 50-200 ppm; or immersing food processing equipment in the non-oxidizing bactericide for a soaking time of more than 2 minutes; or periodically pulse-adding the non-oxidizing bactericide to agricultural irrigation pipes to inhibit bacterial growth by controlling the formation of biofilm on the pipe wall.

[0030] The present invention further provides a sterilization treatment method, comprising the steps of:

[0031] Dilute the above-mentioned non-oxidizing bactericide to the working concentration and add it to the water to be treated;

[0032] The concentration of non-oxidizing bactericides in the water to be treated is maintained by an automatic dosing system;

[0033] Maintain the ORP value of the water body to be treated within the range of -150 to +50 mV;

[0034] A pulsed ultrasonic wave with a frequency of 28~40 kHz is applied synchronously.

[0035] This invention uses plant-based modified organic compounds such as esterified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers to replace traditional organic sulfur compounds, organotin compounds, and organic bromine compounds. This avoids the technical problems of high cost of bromides, easy decomposition by peroxides and ozone, and easy reaction of glutaraldehyde with ammonia or amine compounds, which can lead to inactivation. As a result, the non-oxidizing bactericide not only has high bactericidal efficiency, but also good sustained-release effect and long duration of action. Detailed Implementation

[0036] The following detailed description, in conjunction with specific embodiments, provides further details.

[0037] Example 1:

[0038] The non-oxidizing bactericide in this embodiment comprises the following components by mass percentage:

[0039] 15% plant-based modified organic compounds;

[0040] 8% of compound organic amines or phenols;

[0041] 5% auxiliary film-forming agent and dispersant;

[0042] The rest is deionized water.

[0043] The pH of the solution was adjusted to 6.5 using polyacrylic acid (PPA), and the viscosity of the adjusted solution was 20 mPa•s at room temperature.

[0044] The plant-based modified organic compound in this embodiment is at least one of esterified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers, with a molecular weight range of 800-5000 Da.

[0045] Furthermore, the composite organic amine or phenol in this embodiment is at least one of dichlorophenol, dioxocyanomethane, isothiazolinone, dodecylbenzylammonium chloride, and dodecyldimethylbenzylammonium bromide.

[0046] Studies have found that when the mass ratio of plant-modified compounds to compound organic amines or phenols is 1.5 to 3, the bactericidal effect can be improved by more than 5%.

[0047] The aforementioned auxiliary film-forming agents and dispersants include nonionic surfactants, metal corrosion inhibitors, and biodegradation promoters. The nonionic surfactants have an HLB (Hydrophilic Lipophilic Balance) of 10-16; the metal corrosion inhibitors are nanocomposites of sodium molybdate or sodium tungstate, which can be supplemented with components such as BTA and sodium gluconate; and the biodegradation promoters are fatty alcohol polyoxyethylene ether phosphates. Using these auxiliary film-forming agents and dispersants can significantly prolong the release time of the bactericide, resulting in a longer duration of sterilization.

[0048] In addition, this embodiment also includes a composite stabilizer with a mass fraction of 0.5%, which is composed of BHT, disodium EDTA and organosilicon defoamer, to further enhance the slow-release effect of the bactericide and prolong the bactericidal time.

[0049] The applicant's research shows that the effect is better when the mass fraction ratio of BHT, disodium EDTA, and organosilicon defoamer is 4:2:1.

[0050] After testing industrial circulating water with a bacterial concentration of 2.8*10^8 CFU / mL, it was found that the bactericide component shown in this embodiment can kill a large number of bacteria after being added to the industrial circulating water system. Even after 16 hours, the bacterial content can still be maintained below 2.8*10^5 CFU / mL, which shows that it has a certain bactericidal effect and good slow-release performance.

[0051] This embodiment provides a method for preparing the non-oxidizing bactericide, which mainly includes the following steps:

[0052] 1. Under nitrogen protection, plant-based modified organic compounds are reacted with complex organic amines or phenols at 60°C for 3 hours;

[0053] 2. Add the polymer acid solution step by step to adjust the pH of the solution to 6.5;

[0054] 3. The solution is treated using micro-jet homogenization technology, with a jet pressure of 150~250 MPa;

[0055] 4. Filter after aging for 24 hours.

[0056] In this embodiment, the bactericide can be formulated into the following forms:

[0057] Transparent aqueous solutions, lyophilized powders, and microencapsulated sustained-release formulations.

[0058] The specific steps are as follows:

[0059] After aging for 24 hours, the impurities are filtered out to obtain a transparent aqueous solution of bactericide.

[0060] Alternatively, the trehalose preservative can be reconstituted in a transparent aqueous solution to form a lyophilized powder.

[0061] Alternatively, the lyophilized powder can be injected into capsules made of chitosan-gelatin composite material to create a microcapsule sustained-release formulation.

[0062] Different forms of bactericides can be prepared according to actual use and storage needs.

[0063] Example 2:

[0064] The non-oxidizing bactericide in this embodiment comprises the following components by mass percentage:

[0065] 45% plant-based modified organic compounds;

[0066] 30% of compound organic amines or phenols;

[0067] 20% auxiliary film-forming agents and dispersants;

[0068] The rest is deionized water.

[0069] The pH of the solution was adjusted to 5 using polyacrylic acid (PPA), and the viscosity of the adjusted solution was 150 mPa•s at room temperature.

[0070] The plant-based modified organic compound in this embodiment is at least one of esterified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers, with a molecular weight range of 800-5000 Da.

[0071] Furthermore, the composite organic amine or phenol in this embodiment is at least one of dichlorophenol, dioxocyanomethane, isothiazolinone, dodecylbenzylammonium chloride, and dodecyldimethylbenzylammonium bromide.

[0072] Studies have found that when the mass ratio of plant-modified compounds to compound organic amines or phenols is 1.5 to 3, the bactericidal effect can be improved by more than 5%.

[0073] The aforementioned auxiliary film-forming agents and dispersants include nonionic surfactants, metal corrosion inhibitors, and biodegradation promoters. The nonionic surfactants have an HLB (Hydrophilic Lipophilic Balance) of 10-16; the metal corrosion inhibitors are nanocomposites of sodium molybdate or sodium tungstate, which can be supplemented with components such as BTA and sodium gluconate; and the biodegradation promoters are fatty alcohol polyoxyethylene ether phosphates. Using these auxiliary film-forming agents and dispersants can significantly prolong the release time of the bactericide, resulting in a longer duration of sterilization.

[0074] In addition, this embodiment also includes a composite stabilizer with a mass fraction of 3%, which is composed of BHT, disodium EDTA and organosilicon defoamer, to further enhance the slow-release effect of the bactericide and prolong the bactericidal time.

[0075] The applicant's research shows that the effect is better when the mass fraction ratio of BHT, disodium EDTA, and organosilicon defoamer is 4:2:1.

[0076] After testing industrial circulating water with a bacterial concentration of 2.8*10^8 CFU / mL, it was found that the bactericide component shown in this embodiment can kill a large number of bacteria after being added to the industrial circulating water system. After 16 hours, the bacterial content can still be maintained below 2*10^5 CFU / mL, which shows that it has a certain bactericidal effect and good slow-release performance.

[0077] This embodiment provides a method for preparing the non-oxidizing bactericide, which mainly includes the following steps:

[0078] 1. Under nitrogen protection, plant-based modified organic compounds are reacted with complex organic amines or phenols at 80°C for 4 hours;

[0079] 2. Add the polymer acid solution step by step to adjust the pH of the solution to 4;

[0080] 3. The solution is treated using micro-jet homogenization technology, with a jet pressure of 150~250 MPa;

[0081] 4. Filter after aging for 24 hours.

[0082] In this embodiment, the bactericide can be formulated into the following forms:

[0083] Transparent aqueous solutions, lyophilized powders, and microcapsule sustained-release formulations were prepared according to Example 1.

[0084] Example 3:

[0085] The non-oxidizing bactericide in this embodiment comprises the following components by mass percentage:

[0086] 27% plant-based modified organic compounds;

[0087] 23% of complex organic amines or phenols;

[0088] 10% auxiliary film-forming agents and dispersants;

[0089] The rest is deionized water.

[0090] The pH of the solution was adjusted to 5.5 using polyacrylic acid (PPA), and the viscosity of the adjusted solution was 50 mPa•s at room temperature.

[0091] The plant-based modified organic compound in this embodiment is at least one of esterified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers, with a molecular weight range of 800-5000 Da.

[0092] Furthermore, the composite organic amine or phenol in this embodiment is at least one of dichlorophenol, dioxocyanomethane, isothiazolinone, dodecylbenzylammonium chloride, and dodecyldimethylbenzylammonium bromide.

[0093] Studies have found that when the mass ratio of plant-modified compounds to compound organic amines or phenols is 1.5 to 3, the bactericidal effect can be improved by more than 5%.

[0094] The aforementioned auxiliary film-forming agents and dispersants include nonionic surfactants, metal corrosion inhibitors, and biodegradation promoters. The nonionic surfactants have an HLB (Hydrophilic Lipophilic Balance) of 10-16; the metal corrosion inhibitors are nanocomposites of sodium molybdate or sodium tungstate, which can be supplemented with components such as BTA and sodium gluconate; and the biodegradation promoters are fatty alcohol polyoxyethylene ether phosphates. Using these auxiliary film-forming agents and dispersants can significantly prolong the release time of the bactericide, resulting in a longer duration of sterilization.

[0095] In addition, this embodiment also includes a composite stabilizer with a mass fraction of 1%, which is composed of BHT, disodium EDTA and organosilicon defoamer, to further enhance the slow-release effect of the bactericide and prolong the bactericidal time.

[0096] The applicant's research shows that the effect is better when the mass fraction ratio of BHT, disodium EDTA, and organosilicon defoamer is 4:2:1.

[0097] After testing industrial circulating water with a bacterial concentration of 2.8*10^8 CFU / mL, it was found that the bactericide component shown in this embodiment can kill a large number of bacteria after being added to the industrial circulating water system. After 16 hours, the bacterial content was still maintained below 4.6*10^4 CFU / mL, which shows that it has a certain bactericidal effect and good slow-release performance.

[0098] This embodiment provides a method for preparing the non-oxidizing bactericide, which mainly includes the following steps:

[0099] 1. Under nitrogen protection, plant-based modified organic compounds are reacted with complex organic amines or phenols at 70°C for 4 hours;

[0100] 2. Add the polymer acid solution step by step to adjust the pH of the solution to 5.5;

[0101] 3. The solution is treated using micro-jet homogenization technology, with a jet pressure of 150~250 MPa;

[0102] 4. Filter after aging for 24 hours.

[0103] In this embodiment, the bactericide can be formulated into the following forms:

[0104] Transparent aqueous solutions, lyophilized powders, and microcapsule sustained-release formulations were prepared according to Example 1.

[0105] Example 4:

[0106] The non-oxidizing bactericide in this embodiment comprises the following components by mass percentage:

[0107] 20% plant-based modified organic compounds;

[0108] 10% of compound organic amines or phenols;

[0109] 10% auxiliary film-forming agents and dispersants;

[0110] The rest is deionized water.

[0111] The pH of the solution was adjusted to 5 using polyacrylic acid (PPA), and the viscosity of the adjusted solution was 100 mPa•s at room temperature.

[0112] The plant-based modified organic compound in this embodiment is at least one of esterified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers, with a molecular weight range of 800-5000 Da.

[0113] Furthermore, the composite organic amine or phenol in this embodiment is at least one of dichlorophenol, dioxocyanomethane, isothiazolinone, dodecylbenzylammonium chloride, and dodecyldimethylbenzylammonium bromide.

[0114] Studies have found that when the mass ratio of plant-modified compounds to compound organic amines or phenols is 1.5 to 3, the bactericidal effect can be improved by more than 5%.

[0115] The aforementioned auxiliary film-forming agents and dispersants include nonionic surfactants, metal corrosion inhibitors, and biodegradation promoters. The nonionic surfactants have an HLB (Hydrophilic Lipophilic Balance) of 10-16; the metal corrosion inhibitors are nanocomposites of sodium molybdate or sodium tungstate, which can be supplemented with components such as BTA and sodium gluconate; and the biodegradation promoters are fatty alcohol polyoxyethylene ether phosphates. Using these auxiliary film-forming agents and dispersants can significantly prolong the release time of the bactericide, resulting in a longer duration of sterilization.

[0116] In addition, this embodiment also includes a composite stabilizer with a mass fraction of 2%, which is composed of BHT, disodium EDTA and organosilicon defoamer, to further enhance the slow-release effect of the bactericide and prolong the bactericidal time.

[0117] The applicant's research shows that the effect is better when the mass fraction ratio of BHT, disodium EDTA, and organosilicon defoamer is 4:2:1.

[0118] After testing industrial circulating water with a bacterial concentration of 2.8*10^8 CFU / mL, it was found that the bactericide component shown in this embodiment can kill a large number of bacteria after being added to the industrial circulating water system. After 16 hours, the bacterial content can still be maintained below 2.5*10^3 CFU / mL, which shows that it has a certain bactericidal effect and good slow-release performance.

[0119] This embodiment provides a method for preparing the non-oxidizing bactericide, which mainly includes the following steps:

[0120] 1. Under nitrogen protection, plant-based modified organic compounds are reacted with complex organic amines or phenols at 70°C for 4 hours;

[0121] 2. Add the polymer acid solution step by step to adjust the pH of the solution to 5;

[0122] 3. The solution is treated using micro-jet homogenization technology, with a jet pressure of 150~250 MPa;

[0123] 4. Filter after aging for 24 hours.

[0124] In this embodiment, the bactericide can be formulated into the following forms:

[0125] Transparent aqueous solutions, lyophilized powders, and microcapsule sustained-release formulations were prepared according to Example 1.

[0126] Example 5:

[0127] The non-oxidizing bactericide in this embodiment comprises the following components by mass percentage:

[0128] 25% plant-based modified organic compounds;

[0129] 15% of compound organic amines or phenols;

[0130] 15% auxiliary film-forming agents and dispersants;

[0131] The rest is deionized water.

[0132] The pH of the solution was adjusted to 4.5 using polyacrylic acid (PPA), and the viscosity of the adjusted solution was 120 mPa•s at room temperature.

[0133] The plant-based modified organic compound in this embodiment is at least one of esterified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers, with a molecular weight range of 800-5000 Da.

[0134] Furthermore, the composite organic amine or phenol in this embodiment is at least one of dichlorophenol, dioxocyanomethane, isothiazolinone, dodecylbenzylammonium chloride, and dodecyldimethylbenzylammonium bromide.

[0135] Studies have found that when the mass ratio of plant-modified compounds to compound organic amines or phenols is 1.5 to 3, the bactericidal effect can be improved by more than 5%.

[0136] The aforementioned auxiliary film-forming agents and dispersants include nonionic surfactants, metal corrosion inhibitors, and biodegradation promoters. The nonionic surfactants have an HLB (Hydrophilic Lipophilic Balance) of 10-16; the metal corrosion inhibitors are nanocomposites of sodium molybdate or sodium tungstate, which can be supplemented with components such as BTA and sodium gluconate; and the biodegradation promoters are fatty alcohol polyoxyethylene ether phosphates. Using these auxiliary film-forming agents and dispersants can significantly prolong the release time of the bactericide, resulting in a longer duration of sterilization.

[0137] In addition, this embodiment also includes a composite stabilizer with a mass fraction of 2.5%, which is composed of BHT, disodium EDTA and organosilicon defoamer, to further enhance the slow-release effect of the bactericide and prolong the bactericidal time.

[0138] The applicant's research shows that the effect is better when the mass fraction ratio of BHT, disodium EDTA, and organosilicon defoamer is 4:2:1.

[0139] After testing industrial circulating water with a bacterial concentration of 2.8*10^8 CFU / mL, it was found that the bactericide component shown in this embodiment can kill a large number of bacteria after being added to the industrial circulating water system. After 16 hours, the bacterial content can still be maintained below 3.3*10^3 CFU / mL, which shows better bactericidal effect and better slow-release performance.

[0140] This embodiment provides a method for preparing the non-oxidizing bactericide, which mainly includes the following steps:

[0141] 1. Under nitrogen protection, plant-based modified organic compounds are reacted with complex organic amines or phenols at 70°C for 4 hours;

[0142] 2. Add the polymer acid solution step by step to adjust the pH of the solution to 4.5;

[0143] 3. The solution is treated using micro-jet homogenization technology, with a jet pressure of 150~250 MPa;

[0144] 4. Filter after aging for 24 hours.

[0145] In this embodiment, the bactericide can be formulated into the following forms:

[0146] Transparent aqueous solutions, lyophilized powders, and microcapsule sustained-release formulations were prepared according to Example 1.

[0147] Example 6:

[0148] This embodiment provides an application of the above-mentioned non-oxidizing bactericide, which includes: adding the non-oxidizing bactericide to an industrial circulating water system at a concentration of 50-200 ppm; or immersing food processing equipment in the non-oxidizing bactericide for a soaking time of more than 2 minutes; or periodically pulse-adding the non-oxidizing bactericide to agricultural irrigation pipes to inhibit bacterial growth by controlling the formation of biofilm on the pipe wall.

[0149] In the above applications, non-oxidizing bactericides exhibited highly efficient bactericidal function and long-lasting sustained-release effect. Tests showed that after the addition of non-oxidizing bactericides, the bacterial inhibition rate remained essentially unchanged for 16 hours.

[0150] Example 7:

[0151] This embodiment provides a sterilization treatment method, including the following steps:

[0152] S1: Dilute the above non-oxidizing bactericide to the working concentration and add it to the water to be treated;

[0153] S2: Maintain the concentration of non-oxidizing bactericide in the water to be treated through an automatic dosing system;

[0154] S3: Maintain the ORP value of the water body to be treated within the range of -150 to +50 mV;

[0155] S4: Simultaneously apply pulsed ultrasound with a frequency of 28~40 kHz.

[0156] The above working concentration refers to the working concentration of diluting the stock solution with water to 2%~5%.

[0157] This method can effectively sterilize the water body and maintain the microbial content of the water body at a basically unchanged level for 16-24 hours.

[0158] In summary, this invention uses plant-based modified organic compounds such as esterified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers to replace traditional organic sulfur compounds, organotin compounds, and organic bromine compounds. This avoids the technical problems of high cost of bromides, easy decomposition by peroxides and ozone, and easy reaction of glutaraldehyde with ammonia or amine compounds, resulting in ineffectiveness. As a result, the non-oxidizing bactericide not only has high bactericidal efficiency but also good sustained-release effect and long duration of action.

[0159] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0160] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A non-oxidizing bactericide, characterized in that, It contains the following components: Plant-derived modified organic compounds with a mass fraction of 15% to 45%; Compound organic amines or phenols with a mass fraction of 8% to 30%; Auxiliary film-forming agents and dispersants with a mass fraction of 5% to 20%; and, Deionized water; The pH value of the prepared solution is 4.0~6.5, and the viscosity value at room temperature is 20~150 mPa•s.

2. The non-oxidizing bactericide as described in claim 1, characterized in that, The plant-derived modified organic compound is at least one of esterified flavonoids, quaternized alkaloid derivatives, and sulfonated polyphenol polymers, with a molecular weight range of 800-5000 Da.

3. The non-oxidizing bactericide as described in claim 1, characterized in that, The compound organic amine or phenol is at least one of dichlorophenol, dioxocyanomethane, isothiazolinone, dodecylbenzylammonium chloride, and dodecyldimethylbenzylammonium bromide.

4. The non-oxidizing bactericide as described in claim 1, characterized in that, The mass ratio of the plant-modified compound to the complex organic amine or phenol is 1.5 to 3.

5. The non-oxidizing bactericide as described in claim 1, characterized in that, The auxiliary film-forming agents and dispersants include nonionic surfactants, metal corrosion inhibitors, and biodegradation promoters.

6. The non-oxidizing bactericide according to claim 1, characterized in that, It also contains a composite stabilizer with a mass fraction of 0.5% to 3%, which is composed of BHT, disodium EDTA and organosilicon defoamer.

7. The non-oxidizing bactericide as described in claim 6, characterized in that, The mass fraction ratio of BHT, disodium EDTA, and organosilicon defoamer is 4:2:

1.

8. The non-oxidizing bactericide as described in claim 5, characterized in that, The nonionic surfactant has an HLB value of 10-16; the metal corrosion inhibitor is a nanocomposite of sodium molybdate or sodium tungstate; and the biodegradation promoter is fatty alcohol polyoxyethylene ether phosphate.

9. A method for preparing the non-oxidizing bactericide according to any one of claims 1 to 8, characterized in that, Including the following steps: Under nitrogen protection, plant-based modified organic compounds are reacted with complex organic amines or phenols at 60-80°C for 3-5 hours. Add the polymer acid solution step by step to adjust the pH of the solution to 4.0~6.5; The solution was treated using microjet homogenization technology, with a jet pressure of 150~250 MPa. Filter after aging for 24 hours.

10. The method as described in claim 9, characterized in that, It also includes the following steps: A compound trehalose preservative was added to prepare a freeze-dried powder.

11. The method as described in claim 9, characterized in that, It also includes the following steps: The lyophilized powder is injected into capsules made of chitosan-gelatin composite material to form a microcapsule sustained-release formulation.

12. The application of a non-oxidizing bactericide as described in any one of claims 1 to 8, characterized in that, The non-oxidizing bactericide is added to an industrial circulating water system at a concentration of 50-200 ppm; or, food processing equipment is immersed in the non-oxidizing bactericide for at least 2 minutes; or, the non-oxidizing bactericide is periodically pulsed into agricultural irrigation pipes to inhibit bacterial growth by controlling the formation of biofilm on the pipe walls.

13. A sterilization treatment method, characterized in that, Including the following steps: The non-oxidizing bactericide of any one of claims 1 to 8 is diluted to the working concentration and added to the water to be treated; The concentration of non-oxidizing bactericides in the water to be treated is maintained by an automatic dosing system; Maintain the ORP value of the water body to be treated within the range of -150 to +50 mV; A pulsed ultrasonic wave with a frequency of 28~40 kHz is applied synchronously.