Totally-synthetic cleaning agent as well as preparation method and application thereof

Abstract

The invention relates to a fully-synthetic cleaning agent as well as a preparation method and application thereof. The fully-synthetic cleaning agent comprises a chelating agent, a pH regulator, a surfactant, a solubilizer and pure water, the chelating agent comprises a combination of magnesium citrate, tetrasodium glutamate diacetate, tartaric acid, nitrilotriacetic acid and 1-hydroxyethylidene-1, 1-diphosphonic acid. The total synthesis cleaning agent provided by the invention can effectively remove residual cutting fluid on an aluminum alloy workpiece, especially zinc stearate or lubricating grease on a pure aluminum workpiece in a short time, does not corrode an aluminum pipe, is easy to rinse, is beneficial to keeping the original gloss and chromatic aberration of the product workpiece, is good in safety, does not harm human health, and is suitable for industrial production. Sewage treatment is simple, and cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning agents, and in particular relates to a fully synthetic cleaning agent and a preparation method and application thereof. Background Art

[0002] In the process of metal processing, fully synthetic cutting fluids are widely used for cooling, lubrication and cleaning. However, a large amount of cutting fluid will remain on the surface of the workpiece after processing. These residual cutting fluids not only affect the appearance quality of the product, but also greatly affect the overall product quality, and may also have an adverse effect on subsequent processes. Therefore, in order to maintain the cleanliness of the metal surface and the smooth progress of the processing process, cleaning agents and their cleaning effects are becoming more and more valued by manufacturers.

[0003] CN 103468434A discloses an environmentally friendly and safe solvent cleaning agent, the specific components and weight proportions of which are as follows: 0-97 parts of carbon ten to carbon twelve alkanes; 3-100 parts of alcohol ether solvents; 0.00-0.01 parts of antioxidants; 0.00-0.01 parts of corrosion inhibitors. The invented product has a narrow distillation range, a distillation recovery rate of more than 95%, and a strong cleaning ability. It has a strong cleaning ability for polar dirt and non-polar dirt, especially for various metalworking fluids, oily and water-based cutting fluids. The cleaning is thorough without any residue and no corrosion to metals, overcoming the shortcomings of previous hydrocarbon cleaning agents that have a wide distillation range and can only dissolve and clean non-polar dirt.

[0004] CN117904643A discloses a novel environmentally friendly neutral water-based cleaning agent, which is composed of the following components by mass percentage: 1-2% chelating dispersant, 5-10% non-ionic surfactant, 1-5% cationic non-ionic surfactant, 0.1-1% bactericide and the remainder water; the cleaning agent of the invention has a high-efficiency cleaning effect and is suitable for cleaning the cutting fluid, stamping oil and other dirt attached to the surface of various steels, stainless steels and aluminum alloys; the cleaning agent is neutral, with a pH value of 7-7.5, mild and does not damage the workpiece, and the user's on-site operation is safe and convenient, with strong cleaning ability, easy rinsing, fast cleaning speed, low foaming and good cleaning effect; characteristics: suitable for manual cleaning, ultrasonic cleaning, immersion cleaning, can be used to clean various steels, stainless steels, aluminum alloys and other metals, and has good corrosion inhibition and cleaning effects.

[0005] Although there are more and more types of cleaning agents on the market, most of them have poor cleaning effects, serious color difference and dropout, and harmful substances may be produced during the production and use of cleaning agents. If these substances are discharged into the environment without proper treatment, they will pollute the air, water and soil. Therefore, the development of a highly efficient, low-color-difference and environmentally friendly fully synthetic cleaning agent has become an urgent need in the industry. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention aims to provide a fully synthetic cleaning agent and a preparation method and application thereof.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a fully synthetic cleaning agent, the fully synthetic cleaning agent comprising a chelating agent, a pH adjusting agent, a surfactant, a solubilizing agent and pure water;

[0009] The chelating agent includes a combination of magnesium citrate, tetrasodium glutamate diacetate, tartaric acid, aminotriacetic acid and hydroxyethylidene diphosphonic acid.

[0010] The fully synthetic cleaning agent provided by the present invention can effectively remove the residual cutting fluid on the aluminum alloy workpiece, especially the zinc stearate or lubricating paste on the pure aluminum workpiece, in a short time, does not corrode the aluminum tube, is easy to rinse, and is conducive to maintaining the original gloss and color difference of the product workpiece, has good safety, does not cause harm to human health, is simple to treat sewage, and is low in cost.

[0011] In addition, the chelating agent in the present invention is a combination of magnesium citrate, tetrasodium glutamate diacetate, tartaric acid, aminotriacetic acid and hydroxyethylidene diphosphonic acid. The five are used in combination to have a synergistic effect, which can effectively remove rust and stains on the metal surface, while reducing the pollution of metal ions to the environment and making the cleaning agent more stable.

[0012] Preferably, the fully synthetic cleaning agent comprises, by weight, 1-30 parts of a chelating agent, 1-15 parts of a pH adjusting agent, 5-35 parts of a surfactant, 1-15 parts of a solubilizing agent, and 5-95 parts of pure water.

[0013] The amount of the chelating agent added in the fully synthetic cleaning agent of the present invention can be 2 parts, 4 parts, 5 parts, 7 parts, 9 parts, 10 parts, 13 parts, 15 parts, 17 parts, 20 parts, 21 parts, 23 parts, 25 parts, 27 parts or 29 parts, etc.;

[0014] The pH adjuster may be added in an amount of 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts or 14 parts;

[0015] The amount of the surfactant added can be 6 parts, 7 parts, 9 parts, 10 parts, 13 parts, 15 parts, 17 parts, 20 parts, 21 parts, 23 parts, 25 parts, 27 parts, 30 parts, 32 parts or 34 parts, etc.;

[0016] The solubilizer may be added in an amount of 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts or 14 parts;

[0017] The amount of pure water added can be 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts or 90 parts, etc.

[0018] Preferably, the fully synthetic cleaning agent comprises, by weight, 5-30 parts of a chelating agent, 1-10 parts of a pH adjusting agent, 10-30 parts of a surfactant, 5-15 parts of a solubilizing agent and 5-95 parts of pure water.

[0019] Preferably, the fully synthetic cleaning agent comprises, by weight, 10-30 parts of a chelating agent, 5-10 parts of a pH adjusting agent, 20-30 parts of a surfactant, 10-15 parts of a solubilizing agent and 5-95 parts of pure water.

[0020] Preferably, the mass ratio of magnesium citrate, tetrasodium glutamate diacetate, tartaric acid, aminotriacetic acid and hydroxyethylidene diphosphonic acid is (1-3):(0.1-1):(1-2):(0.5-2):(0.5-1.5).

[0021] Wherein "1-3" can be 1.1, 1.3, 1.5, 1.7, 2, 2.2, 2.5, 2.7 or 2.9, etc.;

[0022] “0.1-1” can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.;

[0023] "1-2" can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0024] “0.5-2” can be 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0025] “0.5-1.5” can mean 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3 or 1.4, etc.

[0026] Preferably, the pH adjuster includes any one of citric acid, tartaric acid, sodium citrate, sodium carbonate, disodium hydrogen phosphate or triethanolamine, or a combination of at least two thereof.

[0027] Preferably, the solubilizer is selected from any one of sodium tripolyphosphate, sodium pyrophosphate, tripropylene glycol monomethyl ether, glycerol or dipropylene glycol butyl ether, or a combination of at least two thereof.

[0028] Preferably, the solubilizer is a combination of sodium tripolyphosphate and dipropylene glycol butyl ether.

[0029] In the present invention, the solubilizing agent is selected from the above combination, which effectively promotes the dispersion and dissolution of oil stains and other stains, can better enhance the mutual solubility of surfactants and other components, reduce the cloud point, and make the formula stable and non-stratified.

[0030] Preferably, the mass ratio of sodium tripolyphosphate to dipropylene glycol butyl ether is 1:(0.5-2), for example, it can be 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8 or 1:1.9, etc.

[0031] Preferably, the surfactant comprises any one of alkyl glycoside, alkanolamide, fatty alcohol polyoxyethylene ether, octylphenol polyoxyethylene ether, sulfonated isomeric alcohol polyoxyethylene ether or linear alkylbenzene sulfonate sodium salt, or a combination of at least two thereof.

[0032] Preferably, the surfactant is a combination of fatty alcohol polyoxyethylene ether and octylphenol polyoxyethylene ether.

[0033] As a preferred technical solution of the present invention, the synergistic combination of the fatty alcohol polyoxyethylene ether and the octylphenol polyoxyethylene ether can significantly reduce the surface tension of water, making it easier for the detergent to penetrate into the interface between the stain and the object to be cleaned, and through emulsification, dispersion, volume expansion and other effects, the oil stain can be better separated from the surface of the object, thereby achieving the purpose of cleaning.

[0034] Preferably, the mass ratio of the fatty alcohol polyoxyethylene ether to the octylphenol polyoxyethylene ether is 1:(1.5-3), for example, it can be 1:1.6, 1:1.8, 1:2, 1:2.2, 1:2.5, 1:2.7 or 1:2.9, etc.

[0035] Preferably, the components of the fully synthetic cleaning agent also include fragrance.

[0036] By adding essence to the cleaning agent of the present invention, the smell of the cleaning agent can be improved to make it more pleasant, thereby enhancing the user experience.

[0037] Preferably, the components of the fully synthetic cleaning agent also include 0.1-1 parts of fragrance by weight, for example, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts or 0.9 parts, etc.

[0038] Preferably, the essence includes any one of lavender essence, pine needle essence or jasmine essence, or a combination of at least two of them.

[0039] Any specific point value within the above numerical range can be selected, and will not be described in detail here.

[0040] In a second aspect, the present invention provides a method for preparing the fully synthetic cleaning agent as described in the first aspect, the preparation method comprising mixing a chelating agent, a pH regulator, a surfactant, and a solubilizing agent in pure water to obtain the fully synthetic cleaning agent.

[0041] Preferably, the preparation method comprises:

[0042] (1) stirring and mixing the surfactant components to obtain a mixed solution;

[0043] (2) adding the chelating agent and pure water to the mixed solution of step (1) and continuing to stir and mix;

[0044] (3) adding a pH adjuster to adjust the pH value, then adding a solubilizer and a fragrance, stirring and mixing, and allowing to stand to obtain the fully synthetic cleaning agent.

[0045] Preferably, the mixing temperature in step (1) is 50-70°C, for example, it can be 51°C, 53°C, 55°C, 57°C, 60°C, 62°C, 65°C, 67°C or 69°C.

[0046] Preferably, a pH regulator is added after cooling in step (3).

[0047] Preferably, the temperature is lowered to 25-40°C, for example, 26°C, 28°C, 30°C, 32°C, 35°C, 37°C or 39°C.

[0048] Preferably, in step (3), the pH is adjusted to 7-9, for example, 7.2, 7.5, 7.8, 8, 8.2, 8.5 or 8.8.

[0049] Any specific point value within the above numerical range can be selected, and will not be described in detail here.

[0050] In a third aspect, the present invention provides a use of the fully synthetic cleaning agent as described in the first aspect in metal processing.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] (1) The fully synthetic cleaning agent provided by the present invention can effectively remove the residual cutting fluid on the aluminum alloy workpiece in a short time, especially the zinc stearate or lubricating paste on the pure aluminum workpiece, does not corrode the aluminum tube, is easy to rinse, and is conducive to maintaining the original gloss and color difference of the product workpiece. It has good safety and will not cause harm to human health. The sewage treatment is simple and the cost is low.

[0053] (2) The chelating agent selected in the present invention can effectively remove rust and stains on the metal surface, while reducing the pollution of metal ions to the environment and making the cleaning agent more stable.

[0054] (3) The preparation method of the fully synthetic cleaning agent provided by the present invention has simple preparation steps, low cost, and is easy to industrialize and mass produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 This is the dyne pen test image of aluminum material after cleaning in Application Example 1;

[0056] Figure 2 This is the dyne pen test image of aluminum material after cleaning in Application Example 2;

[0057] Figure 3 This is the dyne pen test image of aluminum material after cleaning in Application Example 3;

[0058] Figure 4 This is a dyne pen test image of aluminum material after cleaning in comparative application example 6;

[0059] Figure 5 This is a dyne pen test chart of aluminum material after cleaning in comparative application example 7. DETAILED DESCRIPTION

[0060] In order to further explain the technical means and effects adopted by the present invention, the technical solution of the present invention is further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.

[0061] The following materials and comparative examples are as follows:

[0062]

[0063]

[0064] The rest of the raw materials can be used as long as they are purchased from regular dealers.

[0065] Examples 1-3

[0066] This embodiment provides three kinds of fully synthetic cleaning agents, and the formula of the water-based cleaning agent is as follows:

[0067]

[0068]

[0069] The preparation method of the fully synthetic cleaning agent is:

[0070] (1) Adding a surfactant into a stirring barrel for compounding, and continuously stirring and mixing at 60° C. to obtain a mixed solution;

[0071] (2) Add chelating agent and pure water and stir continuously until fully dissolved;

[0072] (3) After cooling to 35° C., a pH adjuster is added to adjust the pH to 8±0.3, and then a solubilizer and a flavor are added. The mixture is stirred evenly and allowed to stand to obtain the cleaning agent.

[0073] Example 4

[0074] This embodiment provides a fully synthetic cleaning agent. The only difference between the fully synthetic cleaning agent and Example 1 is that the surfactant is only fatty alcohol polyoxyethylene ether, and the amount of surfactant is kept unchanged. The other components and addition amounts are consistent with Example 1. The preparation method refers to Example 1.

[0075] Example 5

[0076] This embodiment provides a fully synthetic cleaning agent. The only difference between the fully synthetic cleaning agent and Example 1 is that the surfactant is only octylphenol polyoxyethylene ether, and the amount of surfactant is kept unchanged. The other components and addition amounts are consistent with Example 1. The preparation method refers to Example 1.

[0077] Example 6

[0078] This embodiment provides a fully synthetic cleaning agent. The only difference between the fully synthetic cleaning agent and Example 1 is that the solubilizer is only sodium tripolyphosphate, and the amount of the solubilizer is kept unchanged. The other components and the addition amounts are consistent with those in Example 1. The preparation method refers to Example 1.

[0079] Example 7

[0080] This embodiment provides a fully synthetic cleaning agent. The only difference between the fully synthetic cleaning agent and Example 1 is that the solubilizer is only dipropylene glycol butyl ether, and the amount of the solubilizer is kept unchanged. The other components and the addition amounts are consistent with those in Example 1. The preparation method refers to Example 1.

[0081] Comparative Example 1

[0082] This comparative example provides a fully synthetic cleaning agent, which differs from Example 1 only in that the chelating agent does not include magnesium citrate, and its reduced amount is distributed to tetrasodium glutamate diacetate, tartaric acid, aminotriacetic acid and hydroxyethylidene diphosphonic acid in proportion to the number of parts. The remaining components and addition amounts are consistent with those in Example 1, and the preparation method refers to Example 1.

[0083] Comparative Example 2

[0084] This comparative example provides a fully synthetic cleaning agent, which differs from Example 1 only in that the chelating agent does not include tetrasodium glutamate diacetate, and its reduced amount is distributed to magnesium citrate, tartaric acid, aminotriacetic acid and hydroxyethylidene diphosphonic acid in proportion to the number of parts. The remaining components and addition amounts are consistent with those in Example 1, and the preparation method refers to Example 1.

[0085] Comparative Example 3

[0086] This comparative example provides a fully synthetic cleaning agent, which differs from Example 1 only in that tartaric acid is not included in the chelating agent, and its reduced amount is distributed to magnesium citrate, tetrasodium glutamate diacetate, aminotriacetic acid and hydroxyethylidene diphosphonic acid in proportion to the number of parts. The remaining components and addition amounts are consistent with those in Example 1, and the preparation method refers to Example 1.

[0087] Comparative Example 4

[0088] This comparative example provides a fully synthetic cleaning agent, which differs from Example 1 only in that the chelating agent does not include aminotriacetic acid, and its reduced amount is distributed to magnesium citrate, tetrasodium glutamate diacetate, tartaric acid and hydroxyethylidene diphosphonic acid in proportion to the number of parts. The remaining components and addition amounts are consistent with those in Example 1, and the preparation method refers to Example 1.

[0089] Comparative Example 5

[0090] This comparative example provides a fully synthetic cleaning agent, which differs from Example 1 only in that the chelating agent does not include hydroxyethylidene diphosphonic acid, and the reduced amount thereof is distributed to magnesium citrate, tetrasodium glutamate diacetate, tartaric acid and aminotriacetic acid in proportion to the number of parts. The remaining components and addition amounts are consistent with those in Example 1, and the preparation method refers to Example 1.

[0091] Application Example 1

[0092] This application example provides an application of a fully synthetic cleaning agent in the cleaning of aluminum products, and the application method is:

[0093] (1) Pre-spraying: Use pure water to spray and wash away the impurities and most of the cutting fluid remaining on the surface of the aluminum alloy product;

[0094] (2) Chemical water washing: using pure water to dilute the fully synthetic cleaning agent of Example 1, and then high-pressure spraying the product cleaned in step (1);

[0095] (3) hot water washing: heating pure water and then washing the aluminum material treated in step (2);

[0096] (4) Cold water washing: the aluminum material treated in step (3) is placed in pure water for further washing;

[0097] (5) Cold air drying: cold air drying the aluminum material after the treatment in step (4);

[0098] (6) Hot air drying: The aluminum material treated in step (5) is hot-air dried until no water stains remain on the surface of the aluminum material, and the cleaning process is completed.

[0099] The parameters of each cleaning step are as follows:

[0100]

[0101]

[0102] Application Example 2-7

[0103] This application example provides eight fully synthetic cleaning agents for use in cleaning aluminum products. The application method is different from that of Application Example 1 only in that the cleaning agents of Example 1 are replaced with cleaning agents of Examples 2-7 of equal amounts and concentrations, respectively, and other steps and process parameters remain unchanged.

[0104] Comparative Application Examples 1-5

[0105] This comparative application example provides the application of five fully synthetic cleaning agents in the cleaning of aluminum products. The application method thereof differs from that of Application Example 1 only in that the cleaning agents of Example 1 are replaced with cleaning agents of Comparative Examples 1-5 of equal amounts and concentrations, respectively, and other steps and process parameters remain unchanged.

[0106] Comparative Application Example 6

[0107] This comparative application example provides an application of a water-based cleaning agent in the cleaning of aluminum products. The application method thereof differs from that of Application Example 1 only in that the cleaning agent of Example 1 is replaced with an equal amount of commercially available cleaning agent 1, and other steps and process parameters remain unchanged.

[0108] Comparative Application Example 7

[0109] This comparative application example provides an application of a water-based cleaning agent in the cleaning of aluminum products. The application method thereof differs from that of Application Example 1 only in that the cleaning agent of Example 1 is replaced with an equal amount of commercially available cleaning agent 2, and other steps and process parameters remain unchanged.

[0110] Test Example 1

[0111] The aluminum alloys treated in Application Examples 1-7 and Comparative Application Examples 1-7 were observed for appearance to see whether the surface was clean and whether there was any oil stain. A 40# Dyne pen was used to determine the cleaning effect of the cleaning agent, and Delta E94 was used to determine whether there was any color difference before and after cleaning.

[0112] The dyne pen contains liquid, and the surface tension of the liquid will change due to the influence of surface contaminants. When the pen tip touches the surface, if there is contaminant on the surface, the liquid will shrink, change color, or form clumps on the surface; if there is no contaminant on the surface, the liquid will be evenly distributed on the surface. By observing the changes in the shape of the liquid on the surface, the cleanliness of the surface can be judged. Figure 1-3 This is the effect picture after the Dyne Pen test in Application Example 1-3. Figure 4-5 This is the effect diagram after the Dyne Pen test in Application Example 6-7.

[0113] Delta E94, referred to as ΔE94, is a color difference calculation formula based on the CIE color space (especially the CIELAB color space). It is used to evaluate the visual difference between two color samples and calculates a value. The smaller the value, the smaller the difference between the color samples. Conversely, the greater the difference. If ΔE94>0.3 before and after cleaning, it is judged as a serious color difference and unqualified.

[0114] The results are shown in Table 1.

[0115] Table 1

[0116]

[0117]

[0118] It can be seen from Table 1 that when the cleaning agents of Examples 1-3 of the present invention and the existing cleaning agents are used on the same product, the cleaning agents of the present invention have stronger decontamination ability and can cleanly and efficiently remove the cutting fluid remaining on the surface of the aluminum material. The distribution is uniform after the dyne pen test, and the color difference is small.

[0119] As can be seen from Application Examples 4-5, surfactants have a great influence on the decontamination effect of cleaning agents and can affect the color difference of the substrate surface;

[0120] It can be seen from Application Examples 6-7 that the solubilizer selected in the present invention can effectively improve the mutual solubility of the surfactant and the chelating agent, thereby making the cleaning agent have a better decontamination effect;

[0121] It can be seen from comparative application examples 1-5 that the combined use of magnesium citrate, tetrasodium glutamate diacetate, tartaric acid, aminotriacetic acid and hydroxyethylidene diphosphonic acid in the present invention can better remove ions on the surface of the substrate, enhance the cleaning ability of the detergent, and has a synergistic effect on the above-mentioned effects.

[0122] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate a fully synthetic cleaning agent and its preparation method and application, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0123] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0124] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A fully synthetic cleaning agent, characterized in that: The fully synthetic cleaning agent comprises a chelating agent, a pH adjusting agent, a surfactant, a solubilizing agent and pure water; The chelating agent includes a combination of magnesium citrate, tetrasodium glutamate diacetate, tartaric acid, aminotriacetic acid and hydroxyethylidene diphosphonic acid.

2. The fully synthetic cleaning agent according to claim 1, characterized in that The fully synthetic cleaning agent comprises, by weight, 1-30 parts of a chelating agent, 1-15 parts of a pH adjusting agent, 5-35 parts of a surfactant, 1-15 parts of a solubilizing agent and 5-95 parts of pure water; Preferably, the fully synthetic cleaning agent comprises, by weight, 5-30 parts of a chelating agent, 1-10 parts of a pH adjusting agent, 10-30 parts of a surfactant, 5-15 parts of a solubilizing agent, and 5-95 parts of pure water; Preferably, the fully synthetic cleaning agent comprises, by weight, 10-30 parts of a chelating agent, 5-10 parts of a pH regulator, 20-30 parts of a surfactant, 10-15 parts of a solubilizing agent, and 5-95 parts of pure water.

3. The fully synthetic cleaning agent according to claim 1 or 2, characterized in that: The mass ratio of the magnesium citrate, tetrasodium glutamate diacetate, tartaric acid, aminotriacetic acid and hydroxyethylidene diphosphonic acid is (1-3):(0.1-1):(1-2):(0.5-2):(0.5-1.5).

4. The fully synthetic cleaning agent according to any one of claims 1 to 3, characterized in that: The pH adjuster includes any one of citric acid, tartaric acid, sodium citrate, sodium carbonate, disodium hydrogen phosphate or triethanolamine, or a combination of at least two thereof; Preferably, the solubilizer is selected from any one or a combination of at least two of sodium tripolyphosphate, sodium pyrophosphate, tripropylene glycol monomethyl ether, glycerol or dipropylene glycol butyl ether; Preferably, the solubilizer is a combination of sodium tripolyphosphate and dipropylene glycol butyl ether.

5. The fully synthetic cleaning agent according to any one of claims 1 to 4, characterized in that: The surfactant comprises any one or a combination of at least two of alkyl glycoside, alkanolamide, fatty alcohol polyoxyethylene ether, octylphenol polyoxyethylene ether, sulfonated isomeric alcohol polyoxyethylene ether or linear alkylbenzene sulfonate sodium salt; Preferably, the surfactant is a combination of fatty alcohol polyoxyethylene ether and octylphenol polyoxyethylene ether; Preferably, the mass ratio of the fatty alcohol polyoxyethylene ether to the octylphenol polyoxyethylene ether is 1:(1.5-3).

6. The fully synthetic cleaning agent according to any one of claims 1 to 5, characterized in that: The components of the fully synthetic cleaning agent also include fragrance; Preferably, the components of the fully synthetic cleaning agent further include 0.1-1 parts of fragrance by weight; Preferably, the essence includes any one of lavender essence, pine needle essence or jasmine essence, or a combination of at least two of them.

7. A method for preparing a fully synthetic cleaning agent as claimed in any one of claims 1 to 6, characterized in that: The preparation method comprises the steps of mixing a chelating agent, a pH adjusting agent, a surfactant and a solubilizing agent in pure water to obtain the fully synthetic cleaning agent.

8. The method for preparing a fully synthetic cleaning agent according to claim 7, characterized in that: The preparation method comprises: (1) stirring and mixing the surfactant components to obtain a mixed solution; (2) mixing the chelating agent with pure water and adding the mixture to the mixed solution of step (1), and continuing to stir and mix; (3) adding a pH adjuster to adjust the pH value, then adding a solubilizer and a fragrance, stirring and mixing, and allowing to stand to obtain the fully synthetic cleaning agent.

9. The method for preparing a fully synthetic cleaning agent according to claim 8, characterized in that: The mixing temperature in step (1) is 50-70° C. Preferably, a pH adjusting agent is added after cooling in step (3); Preferably, the temperature is lowered to 25-40°C; Preferably, in step (3), the pH is adjusted to 7-9.

10. Use of the fully synthetic cleaning agent according to any one of claims 1 to 6 in metal processing.

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