A special cleaning agent for removing magnetic particles and carbon black and its preparation method

Abstract

The present invention discloses a special cleaning agent for removing magnetic particles and carbon black and a preparation method thereof, wherein the special cleaning agent for removing magnetic particles and carbon black comprises, by weight, 2 to 15 parts of acidic substances, 2 to 15 parts of nonionic surfactants, 1 to 10 parts of anionic surfactants, 1 to 10 parts of penetrants, 1 to 10 parts of chelating agents, and 60 to 90 parts of water; the acidic substances include at least one of aminosulfonic acid, benzenesulfonic acid, oxalic acid, and maleic acid; the penetrants include at least one of sodium chloride, potassium chloride, and ammonium chloride. The cleaning agent of the present invention overcomes the limitations of a single component through the synergistic effect of each component, ensures the effective removal of stubborn pollutants (such as carbon black and magnetic metal particles), and is suitable for a variety of industrial cleaning needs. In addition, the cleaning agent also improves operational safety, protects the surface quality of workpieces, and meets strict environmental protection requirements, providing a more advanced and sustainable option for industrial cleaning.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning agents, and in particular relates to a cleaning agent special for removing magnetic particles and carbon black and a preparation method thereof. Background Art

[0002] In the manufacturing process of stainless steel workpieces, grinding and polishing is one of the key processes to ensure the surface quality of the product. However, after this process, contaminants such as carbon black powder and magnetic metal particles often adhere to the surface of the workpiece. If these contaminants are not completely removed, they will affect the subsequent processing steps and may have an adverse effect on the final performance of the product.

[0003] Currently, the industry usually uses cleaning agents containing phosphorus compounds (such as potassium pyrophosphate, sodium tripolyphosphate) or acids (such as sulfuric acid, hydrochloric acid) to remove these pollutants. Although these methods can meet the cleaning needs to a certain extent, these traditional methods not only volatilize a large amount of acid mist that is harmful to the human body during use, increase the deterioration of the operating environment and the risk of occupational diseases, but also easily cause excessive corrosion of the stainless steel surface, damage the gloss and corrosion resistance of the material, thereby affecting product quality. In addition, the treatment of the resulting high-concentration hazardous wastewater is complex and costly, which does not meet the increasingly stringent environmental protection regulations and brings additional economic burdens and environmental management challenges to enterprises.

[0004] Therefore, there is an urgent need for a special cleaning agent for removing magnetic particles and carbon black and a preparation method thereof to solve the deficiencies of the existing technical problems. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a special cleaning agent for removing magnetic particles and carbon black and a preparation method thereof, which can effectively remove carbon black powder and magnetic metal particles attached to the surface of the workpiece; at the same time, it also improves operational safety, protects the surface quality of the workpiece and meets environmental protection requirements.

[0006] To achieve the above objectives, the first aspect of the present invention provides a special cleaning agent for removing magnetic particles and carbon black, which includes, by mass, 2 to 15 parts of an acidic substance, 2 to 15 parts of a nonionic surfactant, 1 to 10 parts of an anionic surfactant, 1 to 10 parts of a penetrant, 1 to 10 parts of a chelating agent, and 60 to 90 parts of water; the acidic substance includes at least one of aminosulfonic acid, benzenesulfonic acid, oxalic acid, and maleic acid; the penetrant includes at least one of sodium chloride, potassium chloride, and ammonium chloride.

[0007] Compared with the prior art, the present invention adopts at least one of aminosulfonic acid, benzenesulfonic acid, oxalic acid and maleic acid as the acidic substance. These acidic substances have low volatility and corrosiveness, reduce the generation of acid mist, and avoid excessive corrosion of materials such as stainless steel. At the same time, these acidic substances can also effectively weaken the adsorption force of magnetic metal particles and carbon black on the metal surface, thereby preliminarily loosening the connection between these pollutants and the substrate, thereby creating favorable conditions for cleaning. The penetrant accelerates the speed at which the cleaning liquid reaches the surface of the workpiece by virtue of its strong penetration force, and cooperates with the acidic substance to use external force to peel off the relatively sparse magnetic metal particles and carbon black on the surface of the workpiece; in addition, the penetrant can also ensure that the non-ionic surfactant quickly penetrates and wets the surface of the workpiece to form a thin film, effectively peeling off the magnetic metal particles and carbon black adhered to the surface of the workpiece due to physical and chemical adsorption. The anionic surfactant acts as a dispersant, reduces the attraction between carbon black particles, ensures that the cleaned particles are evenly dispersed, and prevents them from being re-adsorbed on the workpiece. The chelating agent chelates the metal ions in water and dirt, stabilizes the performance of the cleaning agent, and enables the cleaning agent to be efficient and reusable. Therefore, the cleaning agent of the present invention overcomes the limitations of a single component through the synergistic effect of each component, ensures the effective removal of stubborn pollutants (such as carbon black and magnetic metal particles), and is suitable for a variety of industrial cleaning needs. In addition, the cleaning agent also improves operational safety, protects the surface quality of the workpiece, and meets strict environmental protection requirements, providing a more advanced and sustainable option for industrial cleaning.

[0008] Further, the content of the acidic substance of the present invention may be, but is not limited to, 2 parts, 3 parts, 5 parts, 7 parts, 9 parts, 11 parts, 13 parts, and 15 parts; the content of the nonionic surfactant may be, but is not limited to, 2 parts, 3 parts, 5 parts, 7 parts, 9 parts, 11 parts, 13 parts, and 15 parts; the content of the anionic surfactant may be, but is not limited to, 1 part, 2 parts, 3 parts, 5 parts, 7 parts, 9 parts, and 10 parts; the content of the penetrant may be, but is not limited to, 1 part, 2 parts, 3 parts, 5 parts, 7 parts, 9 parts, and 10 parts; the content of the chelating agent may be, but is not limited to, 1 part, 2 parts, 3 parts, 5 parts, 7 parts, 9 parts, and 10 parts; the content of water may be, but is not limited to, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, and 90 parts.

[0009] Furthermore, the special cleaning agent for removing magnetic particles and carbon black of the present invention comprises 5 to 10 parts of acidic substances, 5 to 10 parts of nonionic surfactants, 3 to 8 parts of anionic surfactants, 3 to 5 parts of penetrants, 3 to 5 parts of chelating agents, and 70 to 80 parts of water.

[0010] Furthermore, the special cleaning agent for removing magnetic particles and carbon black of the present invention comprises 6 parts of acidic substances, 8 parts of nonionic surfactants, 4 parts of anionic surfactants, 4 parts of penetrants, 3 parts of chelating agents, and 75 parts of water.

[0011] Furthermore, the nonionic surfactant of the present invention is selected from alkyl glucoside. Alkyl glucoside is easily biodegradable, meets environmental protection requirements, and significantly reduces the negative impact on the environment. Moreover, alkyl glucoside wets the surface of the workpiece by penetrating, replacing the adsorption of particles on the surface of the workpiece, and re-forms a layer of active agent film. The active agent film can not only weaken the adsorption force of particles on the surface of the workpiece, but also prevent the particles dispersed in the cleaning agent from being re-adsorbed.

[0012] Furthermore, the nonionic surfactant of the present invention is selected from at least one of C8-11 branched alkyl glycoside (JFC-2G), C6-8 alkyl polyglucoside (JFC-G), n-hexyl glucoside (APG06), isooctyl glucoside (APG08), and lauryl glucoside (APG1214).

[0013] Furthermore, the anionic surfactant of the present invention is at least one selected from the group consisting of sodium alcohol polyoxyethylene ether carboxylate (AEC), disodium alcohol polyoxyethylene ether sulfosuccinate (AEMES) and fatty acid methyl ester ethoxylate sulfonate (FMES).

[0014] Furthermore, the chelating agent of the present invention is selected from at least one of tetrasodium iminodisuccinate, tetrasodium glutamate diacetate, sodium polyaspartate, and trisodium methylglycine diacetate. Among them, tetrasodium iminodisuccinate is a green and environmentally friendly chelating agent, and also belongs to aminopolycarboxylic acid chelating agents. Its molecular structure contains multiple functional groups that can form stable complexes with metal ions. These functional groups still have strong chelating ability in acidic media, and it can effectively chelate a variety of metal ions such as calcium, magnesium, iron, etc.

[0015] Accordingly, the second aspect of the present invention also provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0016] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0017] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0018] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0019] Compared with the prior art, the present invention mixes the acidic substance, the penetrant and water to form a first phase with a pH value of less than 7, giving it initial penetration ability. Then, a chelating agent is added under acidic conditions to stably bind and remove metal ions that may interfere with the cleaning process. Finally, nonionic and anionic surfactants are added to ensure good wetting, dispersing and emulsifying properties. This method is particularly suitable for removing stubborn pollutants such as magnetic metal particles and carbon black. DETAILED DESCRIPTION

[0020] In order to better illustrate the purpose, technical solution and beneficial effects of the present invention, the present invention will be further described below in conjunction with examples and comparative examples. It should be noted that the scope of the present invention is not limited to the scope described in the examples.

[0021] Example 1

[0022] The present embodiment provides a special cleaning agent for removing magnetic particles and carbon black, which includes, by mass, 6 parts of an acidic substance, 8 parts of a nonionic surfactant, 4 parts of anionic surfactant, 4 parts of a penetrant, 3 parts of a chelating agent, and 75 parts of water; wherein the acidic substance is aminosulfonic acid, the nonionic surfactant is a C8-11 branched alkyl glycoside, the anionic surfactant is sodium fatty alcohol polyoxyethylene ether carboxylate, the penetrant is sodium chloride, and the chelating agent is tetrasodium iminodisuccinate.

[0023] This embodiment provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0024] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0025] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0026] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0027] Example 2

[0028] The present embodiment provides a special cleaning agent for removing magnetic particles and carbon black, which includes, by mass, 3 parts of an acidic substance, 12 parts of a nonionic surfactant, 5 parts of anionic surfactant, 6 parts of a penetrant, 5 parts of a chelating agent, and 82 parts of water; wherein the acidic substance is aminosulfonic acid, the nonionic surfactant is a C8-11 branched alkyl glycoside, the anionic surfactant is sodium fatty alcohol polyoxyethylene ether carboxylate, the penetrant is sodium chloride, and the chelating agent is tetrasodium iminodisuccinate.

[0029] This embodiment provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0030] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0031] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0032] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0033] Example 3

[0034] The present embodiment provides a special cleaning agent for removing magnetic particles and carbon black, which includes, by mass, 6 parts of an acidic substance, 10 parts of a nonionic surfactant, 6 parts of anionic surfactant, 4 parts of a penetrant, 3 parts of a chelating agent, and 80 parts of water; wherein the acidic substance is aminosulfonic acid, the nonionic surfactant is a C6-8 alkyl polyglucoside, the anionic surfactant is a disodium salt of fatty alcohol polyoxyethylene ether sulfosuccinic acid monoester, the penetrant is potassium chloride, and the chelating agent is tetrasodium glutamate diacetate.

[0035] This embodiment provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0036] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0037] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0038] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0039] Example 4

[0040] The present embodiment provides a special cleaning agent for removing magnetic particles and carbon black, which includes, by mass, 10 parts of an acidic substance, 8 parts of a nonionic surfactant, 2 parts of anionic surfactant, 7 parts of a penetrant, 6 parts of a chelating agent, and 86 parts of water; wherein the acidic substance is oxalic acid, the nonionic surfactant is lauryl glucoside, the anionic surfactant is fatty acid methyl ester ethoxylate sulfonate, the penetrant is ammonium chloride, and the chelating agent is sodium polyaspartate.

[0041] This embodiment provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0042] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0043] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0044] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0045] Comparative Example 1

[0046] This comparative example provides a special cleaning agent for removing magnetic particles and carbon black, which includes, by mass, 6 parts of acidic substances, 4 parts of anionic surfactants, 4 parts of penetrants, 3 parts of chelating agents, and 75 parts of water; wherein the acidic substance is aminosulfonic acid, the anionic surfactant is sodium fatty alcohol polyoxyethylene ether carboxylate, the penetrant is sodium chloride, and the chelating agent is tetrasodium iminodisuccinate.

[0047] This comparative example provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0048] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0049] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0050] S3. Add the formulated amount of anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0051] Comparative Example 2

[0052] This comparative example provides a special cleaning agent for removing magnetic particles and carbon black, which includes, by mass, 6 parts of acidic substances, 8 parts of nonionic surfactants, 4 parts of anionic surfactants, 4 parts of penetrants, 3 parts of chelating agents, and 75 parts of water; wherein the acidic substance is aminosulfonic acid, the nonionic surfactant is C8-11 branched alkyl glycoside, the anionic surfactant is sodium fatty alcohol polyoxyethylene ether carboxylate, the penetrant is magnesium chloride, and the chelating agent is tetrasodium iminodisuccinate.

[0053] This comparative example provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0054] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0055] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0056] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0057] Comparative Example 3

[0058] This comparative example provides a special cleaning agent for removing magnetic particles and carbon black, which includes, by mass, 6 parts of acidic substances, 8 parts of nonionic surfactants, 4 parts of anionic surfactants, 4 parts of penetrants, 3 parts of chelating agents, and 75 parts of water; wherein the acidic substance is aminosulfonic acid, the nonionic surfactant is C8-11 branched alkyl glycoside, the anionic surfactant is sodium fatty alcohol polyoxyethylene ether carboxylate, the penetrant is sodium chloride, and the chelating agent is sodium citrate.

[0059] This comparative example provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0060] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0061] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0062] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0063] Comparative Example 4

[0064] The present comparative example provides a special cleaning agent for removing magnetic particles and carbon black, which comprises, by weight, 6 parts of an acidic substance, 8 parts of a nonionic surfactant, 4 parts of an anionic surfactant, 4 parts of a penetrant, 3 parts of a chelating agent, and 75 parts of water; wherein the acidic substance is malonic acid, the nonionic surfactant is a C8-11 branched alkyl glycoside, the anionic surfactant is sodium fatty alcohol polyoxyethylene ether carboxylate, the penetrant is sodium chloride, and the chelating agent is tetrasodium iminodisuccinate.

[0065] This comparative example provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0066] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0067] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0068] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0069] Comparative Example 5

[0070] This comparative example provides a special cleaning agent for removing magnetic particles and carbon black, which comprises, by weight, 6 parts of an acidic substance, 8 parts of a nonionic surfactant, 4 parts of anionic surfactant, 4 parts of a penetrant, 3 parts of a chelating agent, and 75 parts of water; wherein the acidic substance is succinic acid, the nonionic surfactant is a C8-11 branched alkyl glycoside, the anionic surfactant is sodium fatty alcohol polyoxyethylene ether carboxylate, the penetrant is sodium chloride, and the chelating agent is tetrasodium iminodisuccinate.

[0071] This comparative example provides a method for preparing a special cleaning agent for removing magnetic particles and carbon black, the steps comprising:

[0072] S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase;

[0073] S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase;

[0074] S3. Add the formulated amount of nonionic surfactant and anionic surfactant into the second phase, and stir evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.

[0075] The cleaning effects of the cleaning agents of Examples 1 to 4 and Comparative Examples 1 to 5 on carbon black and magnetic metal particles were tested according to the following method. The test results are shown in Table 1.

[0076] 1. Select the same batch of polished stainless steel workpieces to ensure that all workpieces have similar size, shape and surface characteristics; then use a controlled method (such as spraying, spreading or coating) to attach an equal amount of carbon black powder and magnetic metal particles to the surface of each workpiece, and confirm that the contaminants on each workpiece are evenly distributed and the quantity is consistent;

[0077] 2. Dilute the cleaning agents of Examples 1 to 4 and Comparative Examples 1 to 5 with water to a working solution concentration of 10%, add the prepared 10% working solution into an ultrasonic cleaning device and heat it to 50-55° C.;

[0078] 3. Place the stainless steel workpiece to be cleaned into the ultrasonic cleaning equipment, ensure that the working fluid completely immerses the workpiece, set the ultrasonic cleaning time to 5 minutes, and after the cleaning is completed, immediately remove the workpiece from the cleaning equipment and rinse it thoroughly with running water;

[0079] 4. Place the rinsed workpiece immediately into the drying equipment for drying to ensure that there is no moisture left on the surface of the workpiece to prevent oxidation or other chemical reactions.

[0080] 5. Cleanliness inspection is performed using visual inspection and particle removal rate calculation as shown below:

[0081] a. Visual inspection:

[0082] Pass - No obvious carbon black or magnetic particles can be observed by naked eyes under natural light or proper lighting conditions; and the surface is smooth and uniform without obvious stains or spots;

[0083] Unacceptable - Obvious black spots, streaks or other contaminants are visible to the naked eye; and there are uneven color changes or roughness on the surface.

[0084] b. Calculation of particle removal rate:

[0085] Using an optical magnifying glass, five contaminated parts of the test workpiece after cleaning and drying were randomly observed, and the total number of remaining particles (recorded as P1) was calculated. On the other hand, the total number of particles attached to the workpiece surface just after contamination (P0) was also calculated in advance by the same method as above, and the particle removal rate was calculated by the following formula.

[0086] Particle removal rate (%) = (P0-P1) / P0×100%.

[0087] Table 1

[0088] Group Visual inspection Particle removal rate (%) Example 1 qualified 96 Example 2 qualified 93 Example 3 qualified 96 Example 4 qualified 95 Comparative Example 1 Failure 63 Comparative Example 2 Failure 80 Comparative Example 3 Failure 83 Comparative Example 4 Failure 78 Comparative Example 5 Failure 75

[0089] By comparing Example 1 with Comparative Example 1, it can be seen that the cleaning effect of the cleaning agent of Example 1 is better than that of Comparative Example 1. This is because the cleaning agent in Example 1 contains a non-ionic surfactant, and the penetrant and the non-ionic surfactant cooperate with each other to quickly penetrate and wet the surface of the workpiece to form a thin film, which effectively peels off the magnetic metal particles and carbon black adhered to the surface of the workpiece due to physical and chemical adsorption forces; in contrast, the cleaning effect of Comparative Example 1 is significantly reduced due to the lack of a non-ionic surfactant.

[0090] By comparing Example 1 with Comparative Example 2, it can be seen that the cleaning effect of the cleaning agent of Example 1 is better than that of Comparative Example 2. This is because magnesium chloride is used as a penetrant in Comparative Example 2. The magnesium ions introduced by magnesium chloride will increase the hardness of water, and then consume a certain amount of chelating agent to chelate these additional magnesium ions, which will affect the cleaning power and stability of the entire cleaning agent due to insufficient chelating agent. Therefore, the selection of penetrants is crucial to ensure the cleaning effect of the special cleaning agent for removing magnetic particles and carbon black.

[0091] By comparing Example 1 and Comparative Example 3, it can be seen that the cleaning effect of the cleaning agent of Example 1 is better than that of Comparative Example 3. This is because tetrasodium iminodisuccinate is used as a chelating agent in Example 1, while sodium citrate is used as a chelating agent in Comparative Example 3. Tetrasodium iminodisuccinate is an aminopolycarboxylic acid chelating agent, which still has a strong chelating ability in an acidic medium and can effectively chelate metal ions in water and dirt to keep the water hardness within a suitable range. Sodium citrate belongs to the hydroxycarboxylic acid class, and its hydroxyl and carboxyl groups will not dissociate into oxygen anions under acidic conditions. Therefore, sodium citrate cannot effectively chelate metal ions in an acidic medium, resulting in incomplete cleaning. Therefore, the specific selection of the chelating agent is crucial to ensure the cleaning effect of the special cleaning agent for removing magnetic particles and carbon black.

[0092] By comparing Example 1 with Comparative Examples 4 to 5, it can be seen that the cleaning agent of Example 1 exhibits a more excellent cleaning effect. The main reason is that the acidic substance used in Example 1 is aminosulfonic acid, which can provide significantly stronger acidity; the stronger acidity makes aminosulfonic acid more effective in separating and stabilizing suspended carbon black particles, which helps prevent the carbon black particles from re-aggregating, thereby improving the cleaning efficiency. In contrast, the acidic substances in Comparative Examples 4 to 5 are malonic acid and succinic acid, respectively. These two organic weak acids provide weaker acidity, and the effect of improving the dispersibility of carbon black is not as obvious as aminosulfonic acid, so the cleaning effect is also poor. Therefore, the selection of acidic substances is crucial to ensure the cleaning effect of special cleaning agents for removing magnetic particles and carbon black.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention is described in detail with reference to the preferred embodiments, it is not limited to those listed in the embodiments. Those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A special cleaning agent for removing magnetic particles and carbon black, characterized in that: The invention comprises, by weight, 2 to 15 parts of an acidic substance, 2 to 15 parts of a nonionic surfactant, 1 to 10 parts of an anionic surfactant, 1 to 10 parts of a penetrant, 1 to 10 parts of a chelating agent, and 60 to 90 parts of water; the acidic substance comprises at least one of aminosulfonic acid, benzenesulfonic acid, oxalic acid, and maleic acid; the penetrant comprises at least one of sodium chloride, potassium chloride, and ammonium chloride.

2. The special cleaning agent for removing magnetic particles and carbon black according to claim 1, characterized in that: It comprises 5 to 10 parts of acidic substances, 5 to 10 parts of nonionic surfactants, 3 to 8 parts of anionic surfactants, 3 to 5 parts of penetrants, 3 to 5 parts of chelating agents and 70 to 80 parts of water.

3. The special cleaning agent for removing magnetic particles and carbon black according to claim 1, characterized in that: It includes 6 parts of acidic substances, 8 parts of nonionic surfactants, 4 parts of anionic surfactants, 4 parts of penetrants, 3 parts of chelating agents, and 75 parts of water.

4. The special cleaning agent for removing magnetic particles and carbon black as claimed in claim 1, characterized in that: The nonionic surfactant is selected from alkyl glucoside.

5. The special cleaning agent for removing magnetic particles and carbon black as claimed in claim 4, characterized in that: The nonionic surfactant is selected from at least one of C8-11 branched alkyl glucoside, C6-8 alkyl polyglucoside, n-hexyl glucoside, isooctyl glucoside and lauryl glucoside.

6. The special cleaning agent for removing magnetic particles and carbon black as claimed in claim 1, characterized in that: The anionic surfactant is selected from at least one of sodium fatty alcohol polyoxyethylene ether carboxylate, disodium fatty alcohol polyoxyethylene ether sulfosuccinate monoester and fatty acid methyl ester ethoxylate sulfonate.

7. The special cleaning agent for removing magnetic particles and carbon black as claimed in claim 1, characterized in that: The chelating agent is at least one selected from tetrasodium iminodisuccinate, tetrasodium glutamate diacetate, sodium polyaspartate, and trisodium methylglycine diacetate.

8. The method for preparing the special cleaning agent for removing magnetic particles and carbon black according to any one of claims 1 to 7, characterized in that the steps include: S1, stirring and mixing the acidic substance, the penetrant and water in the formula amount to prepare the first phase; S2, adding a formulated amount of chelating agent to the first phase, stirring and mixing to obtain a second phase; S3, adding the formulated amount of nonionic surfactant and anionic surfactant into the second phase, stirring evenly to obtain a special cleaning agent for removing magnetic particles and carbon black.