A scale-inhibiting, rust-proofing and microbial-inhibiting agent

Abstract

This invention discloses a scale inhibitor, rust inhibitor, and microbial suppressant, comprising the following components by mass percentage: a mixture of benzotriazole and benzimidazole derivatives (10-12%); compound component A: sebacic acid (0.8-1.0%), citric acid (0.8-1.0%), and diisooctyl sebacic acid (1.2-1.5%); compound component B: propylene glycol (8-10%) and ethylene glycol (5-8%); compound component C: sodium citrate (2-2.5%), sodium silicate (1.5-2.0%), and sodium polyacrylate (1-1.5%); pH adjuster: triethanolamine (10-20%); and the balance being demineralized water. The beneficial effects of this invention are: the agent obtained by this invention has strong scale inhibition, good corrosion inhibition, good antibacterial effect, strong durability, simple preparation, wide applicability to water treatment, is environmentally friendly, has low pollution, does not use harmful substances such as phosphates and nitrites, has strong adaptability, good practicality, and long-lasting effect, effectively reducing the number of times reagents need to be added or the number of water changes required.

Description

Technical Field

[0001] The invention relates to the technical field related to water treatment agents, in particular to an agent for preventing scale, rust and inhibiting microorganisms. Background Art

[0002] With the improvement of people's living standards, small household heating systems are widely used. However, due to the lack of unified standards for water use in the system, local tap water is generally used. In actual use, scaling, corrosion, and microbial growth occur in the system, resulting in system equipment damage, pipe blockage, valve jamming, and poor local heat conduction. Therefore, it is extremely important to make necessary adjustments to the system water quality and take necessary anti-corrosion measures for metal materials.

[0003] Since traditional water quality scale inhibitors and corrosion inhibitors cannot meet the performance and safety and environmental protection requirements of complex household piping systems such as condensing wall-mounted boilers, conventional wall-mounted boilers, fully premixed wall-mounted boilers, household central air-conditioning two-way heating systems, and household air-energy two-way heating systems, new household heating system protective agents have emerged. This type of product is mainly composed of organic amines, metal corrosion inhibitors, water treatment dispersants, chelating agents and other ingredients.

[0004] Organic phosphonic acid is a widely used water treatment agent. It was developed in the mid-1960s and confirmed in the 1970s. It has good chemical stability, high temperature resistance, low dosage, corrosion inhibition and scale inhibition. In addition, organic phosphonic acid has excellent chelating ability for many metal ions. They solve the problem of calcium carbonate scale in the system. The existence of CP bond makes its chemical properties stable and relatively resistant to high temperature. It has obvious "solubility limit effect" and "synergistic effect". Its disadvantage is that organic phosphonic acid cannot effectively inhibit the calcium phosphate scale, zinc scale and iron oxide deposition problems generated in phosphorus and phosphorus-zinc water treatment formulas. The discharge of phosphorus-containing wastewater causes eutrophication of water bodies and marine red tide problems. In addition, the inorganic phosphorus discharged, degraded and released by some phosphorus-containing scale and corrosion inhibitors will cause eutrophication of surrounding waters, promote the growth of bacteria and algae to form "red tides", and bring great harm to aquaculture and natural ecology. In order to prevent secondary pollution to the environment, environmentally friendly low-phosphorus or phosphorus-free scale and corrosion inhibitors are increasingly attracting people's attention. Phosphates and nitrites may pose certain safety risks in some circumstances, such as possibly affecting human health, or reacting with other compounds to produce harmful substances under certain conditions. Summary of the invention

[0005] In view of the scaling, corrosion, microbial growth and other phenomena in the current heating system and the shortcomings of the existing scale inhibitors and corrosion inhibitors, the present invention aims to provide an environmentally friendly organic water quality protector, that is, a scale inhibitor, rust inhibitor and microbial inhibitor, which uses low-toxic and non-toxic reagents to effectively reduce the risk of use. At the same time, through the synergistic effect between the components, a scale inhibitor, rust inhibitor and microbial inhibitor with good scale inhibition effect, strong corrosion inhibition ability and outstanding antibacterial performance is obtained. The technical solution of the present invention is as follows:

[0006] A scale-inhibiting, rust-proofing and microbial-inhibiting agent, characterized by comprising the following components in percentage by mass:

[0007] Benzotriazole and benzimidazole derivative mixture 10-12%;

[0008] Compound component A: sebacic acid 0.8-1.0%, citric acid 0.8-1.0%, diisooctyl sebacate 1.2-1.5%;

[0009] Compound component B: propylene glycol 8-10%, ethylene glycol 5-8%;

[0010] Compound component C: sodium citrate 2-2.5%, sodium silicate 1.5-2.0%, sodium polyacrylate 1-1.5%;

[0011] pH adjuster: triethanolamine 10-20%; the remainder is deionized water.

[0012] Furthermore, the component of the mixture of benzotriazole and benzimidazole derivatives is 5-methylbenzimidazole.

[0013] Furthermore, the mass ratio of the benzotriazole to the benzimidazole derivative is 1:1 to 1.5.

[0014] Furthermore, the sebacic acid in the composite component A is replaced by a mixed solution of suberic acid and octanoic acid in a mass ratio of 1:1.

[0015] Furthermore, the component added to the composite component C is 0.3-0.5% sodium benzoate.

[0016] Furthermore, the ratio of ethylene glycol to propylene glycol in the compound component B is 1:1 to 1:2.

[0017] Furthermore, the pH regulator triethanolamine controls the pH of the final solution to be 7.5-8.2.

[0018] The beneficial effects of the present invention are: 1. The agent obtained by the present invention has strong scale inhibition ability, good corrosion inhibition ability, good antibacterial effect, strong durability, and can effectively reduce the frequency of reagent addition or replacement; 2. The raw materials of the reagent obtained by the present invention are easy to obtain, the product has strong stability, simple configuration, a wide range of water quality treatment, and corresponding treatment of impurities in water, effectively achieving scale inhibition, corrosion inhibition and antibacterial effects; 3. The agent of the present invention is green and environmentally friendly, with low pollution, does not use phosphates, nitrites and other substances with greater hazards, and uses some natural substances such as citric acid to further increase environmental protection; 4. The agent obtained by the present invention is suitable for the complex requirements of household heating systems, has strong adaptability, good practicality, and long-lasting effect, and can effectively reduce the number of times reagents are added or the number of times water bodies are replaced. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The benzotriazole used in the present invention is water-soluble benzotriazole produced by German Yangying Group. In addition, the implementation method of the present invention adopts conventional standard reagents.

[0021] The specific operation of the reagent configuration of the present invention is as follows:

[0022] First, prepare the composite component B, use it as a solvent, prepare the mixture of benzotriazole and benzimidazole derivatives according to the components, then use it as a solvent to mix the components of the composite component A in proportion to obtain the composite component A, use deionized water as a solvent to mix the components of the composite component C to obtain the composite component C, mix the above substances, add deionized water to dilute for multiple times, and add a pH adjuster to adjust the pH of the solution to 7.5-8.2;

[0023] 10% mixture of benzotriazole and benzimidazole derivative 5-methylbenzimidazole (mass ratio 1:1);

[0024] Compound component A: sebacic acid 0.8%, citric acid 0.8%, diisooctyl sebacate 1.2%;

[0025] Compound component B: propylene glycol 8%, ethylene glycol 5%;

[0026] Compound component C: sodium citrate 2%, sodium silicate 1.5%, sodium polyacrylate 1%;

[0027] The pH adjusting agent triethanolamine is added to adjust the pH to 7.5-8.2; the amount of triethanolamine is controlled to be 10-20%, and the remainder is deionized water.

[0028] 12% mixture of benzotriazole and benzimidazole derivative 5-methylbenzimidazole (mass ratio 1:1);

[0029] Compound component A: sebacic acid 1.0%, citric acid 1.0%, diisooctyl sebacate 1.5%;

[0030] Compound component B: propylene glycol 10%, ethylene glycol 8%;

[0031] Compound component C: sodium citrate 2.5%, sodium silicate 2.0%, sodium polyacrylate 1.5%;

[0032] The pH adjusting agent triethanolamine is added to adjust the pH to 7.5-8.2; the amount of triethanolamine is controlled to be 10-20%, and the remainder is deionized water.

[0033] 10% mixture of benzotriazole and benzimidazole derivative 5-methylbenzimidazole (mass ratio 1:1);

[0034] Compound component A: sebacic acid 0.8%, citric acid 0.8%, diisooctyl sebacate 1.2%;

[0035] Compound component B: propylene glycol 8%, ethylene glycol 5%;

[0036] Compound component C: sodium citrate 2%, sodium silicate 1.5%, sodium polyacrylate 1%, sodium benzoate 0.3%;

[0037] The pH adjusting agent triethanolamine is added to adjust the pH to 7.5-8.2; the amount of triethanolamine is controlled to be 10-20%, and the remainder is deionized water.

[0038] 12% mixture of benzotriazole and benzimidazole derivative 5-methylbenzimidazole (mass ratio 1:1);

[0039] Compound component A: sebacic acid 1.0%, citric acid 1.0%, diisooctyl sebacate 1.5%;

[0040] Compound component B: propylene glycol 10%, ethylene glycol 8%;

[0041] Compound component C: sodium citrate 2.5%, sodium silicate 2.0%, sodium polyacrylate 1.5%, sodium benzoate 0.5%;

[0042] The pH adjusting agent triethanolamine is added to adjust the pH to 7.5-8.2; the amount of triethanolamine is controlled to be 10-20%, and the remainder is deionized water.

[0043] 10% mixture of benzotriazole and benzimidazole derivative 5-methylbenzimidazole (mass ratio 1:1.5);

[0044] Compound component A: sebacic acid 0.8%, citric acid 0.8%, diisooctyl sebacate 1.2%;

[0045] Compound component B: propylene glycol 8%, ethylene glycol 5%;

[0046] Compound component C: sodium citrate 2%, sodium silicate 1.5%, sodium polyacrylate 1%;

[0047] The pH adjusting agent triethanolamine is added to adjust the pH to 7.5-8.2; the amount of triethanolamine is controlled to be 10-20%, and the remainder is deionized water.

[0048] According to GB / T 43486-2023 heating system protective agent test method, the following data were measured (40℃, 0.5wt%, carbon steel)

[0049] pH Scale inhibition rate Corrosion inhibition rate% Antibacterial rate% Example 1 7.5 95.6 95.5 99.2 Example 2 7.5 96.2 96.2 99.2 Example 3 7.5 95.3 96.7 99.4 Example 4 7.5 96.0 97.0 99.5 Example 5 7.5 96.5 97.7 99.5 Example 1 8.0 96.0 96.6 99.4 Example 3 8.0 96.5 96.9 99.7 Example 5 8.0 96.8 97.9 99.8

[0050] The finished product of this embodiment has no obvious scaling and a high corrosion inhibition rate. After testing, the finished products of this embodiment are all practically non-toxic. The results of field use show that the corrosion rate is slow and the antibacterial and bactericidal rates are high.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0052] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be

[0053] Through appropriate combination, other embodiments that can be understood by those skilled in the art are formed.

Claims

1. A scale and rust inhibiting agent for inhibiting microorganisms, characterized in that The following components are included in mass percentage: Benzotriazole and 5-methylbenzimidazole mixture 10-12%; Compound component A: 0.8-1.0% sebacic acid or 0.8-1.0% of a mixed solution of suberic acid and octanoic acid in a mass ratio of 1:1, 0.8-1.0% citric acid, 1.2-1.5% diisooctyl sebacate; Compound component B: propylene glycol 8-10%, ethylene glycol 5-8%; Compound component C: sodium citrate 2-2.5%, sodium silicate 1.5-2.0%, sodium polyacrylate 1-1.5%, sodium benzoate 0.3-0.5%; pH regulator: triethanolamine 10-20%; The remainder is demineralized water.

2. The scale-inhibiting, rust-inhibiting and microbial-inhibiting agent according to claim 1, characterized in that: The mass ratio of the benzotriazole to 5-methylbenzimidazole is 1:1-1.

5.

3. The scale-inhibiting, rust-inhibiting and microbial-inhibiting agent according to claim 1, characterized in that: The mass ratio of ethylene glycol to propylene glycol in the composite component B is 1:1 to 1:

2.

4. The scale-inhibiting, rust-inhibiting and microbial-inhibiting agent according to claim 1, characterized in that: The pH regulator triethanolamine controls the pH of the final solution to be 7.5-8.2.