A salt-tolerant aquaculture composite iodine composition and a preparation method thereof

Abstract

The application discloses a kind of salt-tolerant aquaculture composite iodine composition and preparation method thereof, and disinfectant technical field.It includes the following weight percentage content: surfactant 5-25%, iodine 1-3%, iodide 0.1-1.0%, inorganic acid 0-25%, solvent 0-5%, and the rest is water;The surfactant at least includes C16-C18 fatty alcohol polyether.The added cetostearyl alcohol polyether in the application can be used with the existing composite iodine containing cationic surfactant and nonionic surfactant, can make the micellar structure of cationic surfactant and nonionic surfactant more closely, and the iodine complexation effect is better, not easy to be demulsified, with good use stability in high content salt water, improve the utilization rate and sterilization efficiency of composite iodine.

Description

Technical Field

[0001] This invention relates to the field of disinfectant technology, specifically to a salt-resistant compound iodine composition and its preparation method. Background Technology

[0002] In aquaculture, due to continuous feeding, some feed dissolves in the water, causing an increase in the concentration of nitrite and ammonia nitrogen, which in turn increases the salinity of the water. Increased salinity can easily affect the water quality, leading to bacterial or viral infections, causing aquatic diseases and even death. Aquatic disinfectants can avoid these problems.

[0003] Commonly used aquatic disinfectants include glutaraldehyde, quaternary ammonium salts, iodine derivatives, and guanidine derivatives, with compound iodine being the most prevalent. Traditional compound iodine solutions typically use octylphenol / nonylphenol polyoxyethylene ether or lauryl alcohol polyoxyethylene ether to complex with iodine. These compound iodine solutions are effective in freshwater and brackish water aquaculture, but they are prone to salt intolerance in high-salinity seawater aquaculture, exhibiting aggregation, turbidity, and iodine precipitation, leading to reduced effectiveness. Typical salinity in seawater aquaculture is 30‰-35‰, while salinity in special aquaculture species can reach 50‰-60‰. CN112753714A discloses a disinfectant and its preparation process for disinfecting poultry, which includes 5-30% benzalkonium bromide; 0.5-10% iodine; 0.5-10% potassium iodide; 1-50% surfactant; 10-40% alcohol; and 20-50% water. The surfactant is polyvinylpyrrolidone, cetearyl ether-25, dodecyl dimethylamine oxide, fatty alcohol polyoxyethylene ether, or stearic acid polyoxyethylene ether. In this technical solution, benzalkonium chloride combines with iodide ions in potassium iodide to produce quaternary ammonium salt iodine. Quaternary ammonium salt iodine is prone to crystallization, and even with the addition of surfactant, it is difficult for the surfactant to achieve stability at high salt concentrations. CN113632803A discloses a quaternary ammonium salt complexed iodine disinfectant and its preparation method, comprising 18-35% quaternary ammonium salt, 55-78% surfactant, 4-10% iodine, and 0.18-0.85% stabilizer. Although this disinfectant does not contain iodide ions, it is only effective in fresh water; in salt water of approximately 30‰, it will separate into layers, exhibiting poor salt tolerance. CN106386853A discloses a multi-effect active iodine disinfectant, its preparation method, and its uses. This technical solution includes 1-12% iodine, 0.1-2% potassium iodate, 0.5-3% potassium iodide, and 20-48% surfactant, etc. The surfactant is at least one of fatty alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, povidone K30, and povidone K90, i.e., a nonionic surfactant. The compound iodine solution for aquaculture and its preparation method disclosed in publication number CN103210958A contains iodine, iodide, nonionic surfactant, hydrochloric acid with a concentration of 75% by weight, phosphoric acid with a concentration of 85% by weight, and water. The nonionic surfactant is NP-10 (nonylphenol polyoxyethylene ether-10), which is also a nonionic surfactant. The principle of nonionic surfactant is to make the disinfectant form an emulsion, thereby achieving a stable state. However, when added to high salt water, the salt water will break the emulsion, crystallize and precipitate, making the water turbid. Summary of the Invention

[0004] To address the aforementioned problems, this invention protects a salt-resistant composite iodine composition for salt production and its preparation method, which maintains good solubility and stability in high-salt environments, disperses uniformly in solution, does not agglomerate, and does not precipitate iodine.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A salt-resistant composite iodine composition comprising the following weight percentages: 5%-25% surfactant, 1%-3% iodine, 0.1%-1.0% iodide, 0-25% inorganic acid, 0-5% solvent, and the balance being water;

[0007] The surfactant includes at least C16-C18 fatty alcohol polyethers.

[0008] Furthermore, the salt-resistant compound iodine composition comprises the following weight percentages: 5%-25% surfactant, 1.8%-2.0% iodine, 0.8%-1.0% iodide, 0-25% inorganic acid, 0-5% solvent, and the balance being water.

[0009] Furthermore, the fatty alcohol polyether is cetearyl alcohol polyether.

[0010] Furthermore, the EO number in the cetearyl alcohol polyether is 5-25.

[0011] Furthermore, the surfactant also includes an auxiliary surfactant, which is any one or more of alkylphenol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, and quaternary ammonium salt.

[0012] Furthermore, the alkylphenol polyoxyethylene ether is a C8-C22 alkylphenol polyoxyethylene ether; the EO number in the alkylphenol polyoxyethylene ether is 7-10.

[0013] Furthermore, the EO number of the lauryl alcohol polyoxyethylene ether is 7-10.

[0014] Furthermore, the iodide is potassium iodide and / or sodium iodide.

[0015] Furthermore, the inorganic acid is concentrated hydrochloric acid and / or phosphoric acid, wherein the concentrated hydrochloric acid accounts for 0-2% of the composition by mass, and the phosphoric acid accounts for 15-20% of the composition by mass.

[0016] This invention also discloses a salt-resistant composite iodine composition, comprising the following steps: diluting an iodide with water, mixing it with a surfactant, adding it to a reaction vessel and stirring until homogeneous, then adding iodine and a solvent, and reacting at 30-60°C for 1-5 hours until the iodine is completely dissolved; dissolving an inorganic acid in water and adding it to the reaction vessel, stirring until homogeneous to obtain the final product.

[0017] The beneficial effects of the present invention, namely, the salt-resistant composite iodine composition for salt production and its preparation method, are as follows:

[0018] (1) The surfactant used in this invention includes cetearyl alcohol polyether, and the EO number of cetearyl alcohol polyether is 5-25. This surfactant is a long carbon chain nonionic surfactant. By increasing the number of micelles through long carbon chain surfactant, the complexing ability of iodine is enhanced. It is not easily demulsified in high salt water. Iodide ions in the composite iodine composition are not easily precipitated. Therefore, there is no phenomenon of layering, turbidity, or iodine precipitation. It has stability in high salt solution and can be used alone as a composite iodine stabilizer.

[0019] (2) The cetearyl alcohol polyether added in this invention can be used in combination with existing composite iodine containing cationic and nonionic surfactants. This can make the micelle structure of cationic and nonionic surfactants more compact, improve the iodine complexation effect, and make it less prone to demulsification. It has good stability in high-content brine and improves the utilization rate and sterilization efficiency of composite iodine. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be clearly and completely described below with reference to embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] A salt-resistant composite iodine composition comprising the following weight percentages: 5%-25% surfactant, 1%-3% iodine, 0.1%-1.0% iodide, 0-25% inorganic acid, 0-5% solvent, and the balance being water;

[0022] The surfactant includes at least C16-C18 fatty alcohol polyethers.

[0023] It should be further noted that the salt-resistant compound iodine composition includes the following weight percentages: surfactant 15%-25%, iodine 1.8%-2.0%, iodide 0.8%-1.0%, inorganic acid 0-25%, solvent 0-5%, and the balance being water.

[0024] It should be further noted that the fatty alcohol polyether is cetearyl alcohol polyether, and the EO number in cetearyl alcohol polyether is 5-25. Cetearyl alcohol polyether has strong wetting and emulsifying properties, and exhibits good emulsification stability over a wide pH range, as well as good salt resistance. When compounded with other cationic and nonionic surfactants, it can prevent demulsification of the solution under high salt conditions, thereby improving the overall stability of the product.

[0025] It should be further noted that the surfactant also includes auxiliary surfactants, which are any one or more of alkylphenol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, and quaternary ammonium salts.

[0026] Preferably, the alkylphenol polyoxyethylene ether is a C8-C22 alkylphenol polyoxyethylene ether; the EO number in the alkylphenol polyoxyethylene ether is 7-10.

[0027] Preferably, the EO number of lauryl alcohol polyoxyethylene ether is 7-10.

[0028] Preferably, the quaternary ammonium salt is any one or more of the following: dodecyltrimethylammonium chloride, tetradecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, dodecyltrimethylammonium bromide, tetradecyltrimethylammonium bromide, hexadecyltrimethylammonium bromide, decamethylammonium bromide, decapotassium chloride, disdecyldimethylammonium chloride, and disdecyldimethylammonium bromide. The addition of the quaternary ammonium salt can form a quaternary ammonium salt complex with the iodine, and when combined with cetearyl alcohol polyether, the precipitation of the quaternary ammonium salt complex iodine can be avoided, further improving the bactericidal effect of the composition.

[0029] It should be further noted that the iodide is potassium iodide and / or sodium iodide.

[0030] It should be further noted that the inorganic acid is concentrated hydrochloric acid and / or phosphoric acid, wherein the concentrated hydrochloric acid accounts for 0-2% by mass in the composition, and the phosphoric acid accounts for 15-20% by mass in the composition. The inorganic acid composition can improve the stability of iodine, and at the same time, it provides an acidic environment to the water body during product use, thereby enhancing the bactericidal effect.

[0031] It should be further noted that the solvent is one or more of ethanol, ethylene glycol, polyethylene glycol, propylene glycol, n-propanol, and isopropanol.

[0032] Example 1

[0033] A salt-resistant composite iodine composition comprising the following weight percentages: 20% cetearyl alcohol polyether-15, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1% ethanol, and the balance being water.

[0034] Example 2

[0035] A salt-resistant composite iodine composition comprising the following weight percentages: 15% cetearyl alcohol polyether-10, 1% elemental iodine, 0.9% potassium iodide, 18% phosphoric acid, 1% ethanol, and the balance being water.

[0036] Example 3

[0037] A salt-resistant composite iodine composition comprising the following weight percentages: 22% cetearyl alcohol polyether-25, 3% elemental iodine, 0.8% potassium iodide, 15% phosphoric acid, 2% ethanol, and the balance being water.

[0038] Example 4

[0039] A salt-resistant composite iodine composition comprising the following weight percentages: 25% cetearyl alcohol polyether-15, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 3% ethanol, and the balance being water.

[0040] Example 5

[0041] A salt-resistant composite iodine composition comprising the following weight percentages: 10% cetearyl alcohol polyether-15, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0042] Example 6

[0043] A salt-resistant composite iodine composition comprising the following weight percentages: 5% cetearyl alcohol polyether-15, 20% dodecylphenol polyoxyethylene ether-7, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0044] Example 7

[0045] A salt-resistant composite iodine composition comprising the following weight percentages: 5% cetearyl alcohol polyether-15, 20% dodecylphenol polyoxyethylene ether-9, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0046] Example 8

[0047] A salt-resistant composite iodine composition comprising the following weight percentages: 5% cetearyl alcohol polyether-15, 20% dodecylphenol polyoxyethylene ether-10, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0048] Example 9

[0049] A salt-resistant composite iodine composition comprising the following weight percentages: 5% cetearyl alcohol polyether-15, 20% hexadecylphenol polyoxyethylene ether-7, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0050] Example 10

[0051] A salt-resistant composite iodine composition comprising the following weight percentages: 5% cetearyl alcohol polyether-15, 20% lauryl alcohol polyoxyethylene ether-7, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0052] Example 11

[0053] A salt-resistant composite iodine composition comprising the following weight percentages: 5% cetearyl alcohol polyether-15, 20% lauryl alcohol polyoxyethylene ether-9, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0054] Example 12

[0055] A salt-resistant composite iodine composition comprising the following weight percentages: 5% cetearyl alcohol polyether-15, 10% lauryl alcohol polyoxyethylene ether-10, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0056] Example 13

[0057] A salt-resistant composite iodine composition comprising the following weight percentages: 20% cetearyl alcohol polyether-15, 5% decanmethylammonium bromide, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0058] Example 14

[0059] A salt-resistant composite iodine composition comprising the following weight percentages: 5% cetearyl alcohol polyether-15, 10% lauryl alcohol polyoxyethylene ether-10, 10% dodecylphenol polyoxyethylene ether-10, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0060] Example 15

[0061] A salt-resistant composite iodine composition comprising the following weight percentages: 2% cetearyl alcohol polyether-15, 5% lauryl alcohol polyoxyethylene ether-10, 5% dodecylphenol polyoxyethylene ether-10, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0062] Comparative Example 1

[0063] A composite iodine composition comprising the following weight percentages: 25% lauryl alcohol polyoxyethylene ether-10, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0064] Comparative Example 2

[0065] A composite iodine composition comprising the following weight percentages: 25% dodecylphenol polyoxyethylene ether-10, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0066] Comparative Example 3

[0067] A composite iodine composition comprising the following weight percentages: 25% decanbromium bromide, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0068] Comparative Example 4

[0069] A composite iodine composition comprising the following weight percentages: 10% lauryl alcohol polyoxyethylene ether-10, 10% dodecylphenol polyoxyethylene ether-10, 5% decanmethylammonium bromide, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0070] Comparative Example 5

[0071] A composite iodine composition comprising the following weight percentages: 15% lauryl alcohol polyoxyethylene ether-10, 10% dodecylphenol polyoxyethylene ether-10, 5% decanmethylammonium bromide, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0072] Comparative Example 6

[0073] A composite iodine composition comprising the following weight percentages: 25% nonylphenol polyoxyethylene ether-10, 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0074] Blank group

[0075] The complex iodine composition comprises the following weight percentages: 2% elemental iodine, 1.0% potassium iodide, 18% phosphoric acid, 1.8% ethanol, and the balance being water.

[0076] Performance testing

[0077] I. Stability Testing Methods:

[0078] 1. Prepare a 100‰ seawater stock solution by mixing sea salt crystals and pure water at a mass ratio of 1:9. Then, prepare seawater solutions of 10‰, 35‰, and 50‰ concentrations using the seawater stock solution and pure water (fill only 70ml of the 100ml glass tube sample solution for easy mixing).

[0079] 2. Add 5 drops, 10 drops, 15 drops, 20 drops, 25 drops, and 30 drops of the corresponding reagents from Examples 1, Comparative Examples 1-6, and the blank group to the above sample solutions respectively (increasing the concentration gradually in increments of 5 drops);

[0080] 3. After each sample addition, stopper the test tube and shake thoroughly by inverting it. Record how many drops of each sample would cause turbidity at each seawater concentration. (If no turbidity is observed after 30 drops, the sample is considered completely salt-tolerant.) The resulting aquaculture water is shown in Table 1.

[0081] Table 1. Stability of compound iodine in seawater at different concentrations

[0082]

[0083] As shown in Table 1, Example 1 contained cetearyl alcohol polyether, while Comparative Examples 1-6 did not. Conventional nonionic surfactants were used, and the experimental results showed excellent stability in low-concentration seawater (10‰). However, as the seawater concentration increased, Comparative Examples 1-6, which did not contain cetearyl alcohol polyether, became turbid. Especially at a high seawater concentration of 50‰, Comparative Examples 1-6 and the control group all became turbid, indicating that conventional nonionic surfactants cannot stabilize the composite iodine in high-concentration brine. The addition of specific cetearyl alcohol polyether in this invention allows it to adapt to high-concentration seawater, which is beneficial for disinfection and sterilization in mariculture.

[0084] II. Sterilization Performance Test

[0085] Inspection basis: Disinfection Technical Specifications (2002 edition)

[0086] 1. Prepare and sterilize nutrient broth, sterile water, TPS, and various consumables (prepare in advance). Inoculate Aeromonas hydrophila, Edwardsiella tarda, Streptococcus agalactiae, and Aeromonas verrucosa on blood agar plates one day in advance for growth.

[0087] 2. Dilution of test samples (compound iodine compositions obtained in Example 1 and Comparative Examples 1-6)

[0088] (1) Original sample — 1024 ppm (4 groups)

[0089] (2) Disinfectant dilution gradient table

[0090] B1(512) B2(256) B3(128) B4(64) B5(32) B6(16) B7(8) B8(4) B9(2) B10(1) C1(512) C2(256) C3(128) C4(64) C5(32) C6(16) C7(8) C8(4) C9(2) C10(1) D1(512) D2(256) D3(128) D4(64) D5(32) D6(16) D7(8) D8(4) D9(2) D10(1)

[0091] Note: The unit "ppm" in parentheses refers to 2.5 ml of the corresponding compound iodine composition diluent in each glass tube.

[0092] 3. Dilution of bacterial suspension samples

[0093] (1) Bacterial blood agar medium + 5 ml TPS (scrape the bacterial growth with an inoculation loop and gently shake 80 times) = F0

[0094] (2) F0—McClellan turbidimeter (0.344)—10-fold dilution 3 times (TPS) = T0 bacterial culture

[0095] 4. Antibacterial test

[0096] (1) Add 2.5 ml of nutrient broth and 100 μl of T0 bacterial solution to the test sample dilution solution, then add a sieve, seal the container, and shake for 20 seconds.

[0097] (2) Negative control (5ml broth), positive control (5ml broth + 100ul T0 bacterial suspension)

[0098] 5. The bacteria were incubated at 28℃ for 24 hours and 48 hours, and the results were recorded (turbidity indicates bacterial growth, and clearness indicates no growth). The results are shown in Table 2.

[0099] Table 2. Sterilization performance

[0100]

[0101]

[0102] As can be seen from Table 2, Example 1 of the present invention has a significantly superior bactericidal function against most bacteria, especially Aeromonas hydrophila, indicating that the cetearyl alcohol polyether of the present invention has a synergistic effect on the bactericidal performance of iodine.

[0103] III. Safety Performance Testing of Raw Fish

[0104] 1. Laboratory animals

[0105] Using live fish fry, select healthy individuals that are responsive, free from injury or disease, and of similar size as experimental subjects (specifically, body length 5-7cm). Temporarily raise them in a cement tank in the laboratory, feeding them with ground live fish food for 2 days, and then transfer them to an experimental aquarium for one day. Replace any abnormal fry in a timely manner.

[0106] 2.Physical and chemical conditions

[0107] The experimental water was tap water that had been aerated for 48 hours. The water temperature was controlled at about 25°C by a heater, and the water quality met the fishery water quality standard (GB 11607-1989).

[0108] The experiment was conducted in accordance with the "Technical Specifications for Clinical Trials of Veterinary Drugs" and the semi-static water method was used to conduct the challenge experiment based on laboratory conditions.

[0109] Grouping: Based on preliminary experiments, the safe concentration range of the sample in Example 1 was determined (upper limit of safe mass concentration of 32 ppm for all-viviparous and lower limit of safe mass concentration of 128 ppm for all-lethal) in 72h. The sample in Example 1 was divided into experimental groups using the logarithmic gradient method, as shown in Table 3.

[0110] Table 3 Logarithmic Gradient Method

[0111]

[0112] Ten experimental fish were placed in each mass concentration gradient, with two replicates within each group. The activity of the subjects was continuously observed. The absence of any reaction when the fish was touched by tweezers multiple times was used as the criterion for judging death. Dead individuals were removed promptly, and the fluid was changed every 24 hours, with the mortality rate recorded.

[0113] Data processing: A regression equation was established based on the experimental results, and then the safe mass concentration of the experimental drug was calculated.

[0114] The calculation formula is: SC = 0.1 × xLC 50 Where SC is the safe mass concentration, X is the time in hours, and LC is the mass concentration in hours. 50 It is the median lethal concentration over time X.

[0115] The data obtained through recording is shown in Table 4:

[0116] Table 4. Number of dead fish in each group

[0117] 30min 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 2h 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 1 / 0 7 / 6 6h 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 0 / 1 12h 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 24h 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 0 / 1 1 / 0 48h 0 / 0 0 / 0 0 / 0 0 / 0 1 / 0 1 / 0 2 / 1 72h 0 / 0 0 / 0 0 / 0 0 / 0 0 / 0 4 / 1 0 / 2 48-hour mortality rate (%) 0 / 0 0 / 0 0 / 0 0 / 0 10 / 0 20 / 10 90 / 80 72-hour mortality rate (%) 0 / 0 0 / 0 0 / 0 0 / 0 10 / 0 60 / 20 100 / 100

[0118] The data in Table 4 were analyzed using SPSS (version 27) to calculate the 24hLC. 50 48hLC 50 and 72hLC 50 , through SC = 0.1 × xLC 50 Calculate the corresponding safe concentration value.

[0119] 24hLC 50 =118.08mg / L; 24hSC=0.1×24h LC 50 =11.81 mg / L;

[0120] 48hLC 50 =107.38mg / L; 48hSC=0.1×48h LC 50 =10.74 mg / L;

[0121] 72hLC 50 =97.60mg / L; 72hSC=0.1×72h LC 50 =9.60 mg / L;

[0122] Conclusion: The experimental results show that the safe concentration range of this compound iodine is much higher than the usage concentration of compound iodine (per 1m³). 3 It contains water (0.1 ml) and has good safety.

[0123] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0124] Finally, it should be noted that the embodiments disclosed in this invention are merely preferred embodiments of this invention and are only used to illustrate the technical solutions of this invention, not to limit it. Although this invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this invention.

Claims

1. A composite iodine composition for saltwater production, characterized in that: It includes the following weight percentages: cetearyl alcohol polyether-15 5%-25%, iodine 1%-3%, potassium iodide and / or sodium iodide 0.1%-1.0%, phosphoric acid 15%-20%, ethanol 1%-5%, and the balance being water.

2. The salt-resistant composite iodine composition according to claim 1, characterized in that: It includes the following weight percentages: cetearyl alcohol polyether-15 5%-25%, iodine 1.8%-2.0%, potassium iodide and / or sodium iodide 0.8%-1.0%, phosphoric acid 15%-20%, ethanol 1%-5%, and the balance being water.

3. A method for preparing a salt-resistant composite iodine composition according to claim 1 or 2, characterized in that: Includes the following steps: Potassium iodide and / or sodium iodide are diluted with water and mixed with cetearyl alcohol polyether-15. The mixture is then added to a reaction vessel and stirred until homogeneous. Iodine and ethanol are then added, and the mixture is reacted at 30-60℃ for 1-5 hours until the iodine is completely dissolved. Phosphoric acid is dissolved in water and added to the reaction vessel, and the mixture is stirred until homogeneous.

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