Efficient metal oil removal powder and preparation method thereof

Abstract

The invention relates to the technical field of cleaning agents, in particular to efficient metal oil removal powder and a preparation method thereof, and the efficient metal oil removal powder at least comprises the following components in parts by weight: 15-40 parts of sodium hydroxide, 50-75 parts of inorganic acid salt, 5-10 parts of organic acid salt and 1-5 parts of a polyoxyethylene ether surfactant. By optimizing a formula system of the oil removal powder, the oil removal efficiency and cost are effectively balanced, and the oil removal powder has very high market application and popularization value.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning agents, and specifically to a high-efficiency metal degreasing powder and a preparation method thereof. Background Art

[0002] Degreasing processes include mechanical degreasing, solvent degreasing, chemical degreasing, electrolytic degreasing, etc.; among them, chemical degreasing can quickly decompose grease and make it separate from the metal surface through the saponification reaction of hot alkali solution (for saponifiable oil) and the emulsification of surfactants (for non-saponifiable oil). The reaction rate is significantly higher than that of simple mechanical cleaning, especially suitable for batch processing of complex parts. However, there are still certain problems with chemical degreasing products at present, including that traditional formulations containing phosphates and nitrogen compounds are prone to cause eutrophication of water bodies, and it is impossible to effectively balance degreasing efficiency and cost. Chinese Patent Application (Publication No. CN 107513757A) discloses a steel chemical degreasing powder and its preparation and use methods, which ensure the degreasing effect by using an alkaline degreasing system composed of sodium carbonate, sodium hydroxide and sodium tripolyphosphate in combination with a high addition amount of surfactant. However, the introduction of sodium tripolyphosphate leads to eutrophication of water bodies after the product is discharged, and the overall cost is relatively high, which limits its large-scale industrial promotion and application. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a high-efficiency metal degreasing powder and a preparation method thereof, which effectively balance degreasing efficiency and cost by optimizing the degreasing powder formulation system, and have high market application and promotion value.

[0004] On the one hand, the present invention provides a high-efficiency metal degreasing powder, which, by weight, at least includes 15 - 40 parts of sodium hydroxide, 50 - 75 parts of inorganic acid salts, 5 - 10 parts of organic acid salts, and 1 - 5 parts of polyoxyethylene ether surfactants.

[0005] In one embodiment, by weight, the raw materials for preparing the high-efficiency metal degreasing powder at least include: 20 - 30 parts of sodium hydroxide, 60 - 70 parts of inorganic acid salts, 5 - 10 parts of organic acid salts, and 2 - 4 parts of polyoxyethylene ether surfactants.

[0006] In one embodiment, the inorganic acid salt is selected from at least one of sodium carbonate, sodium sulfate or sodium metasilicate pentahydrate.

[0007] In one embodiment, the inorganic acid salt is a combination of sodium carbonate and sodium sulfate.

[0008] In one embodiment, the mass ratio of sodium carbonate to sodium sulfate is (4 - 6):(1 - 2).

[0009] In one embodiment, the mass ratio of sodium carbonate to sodium sulfate is 5:(1 - 2).

[0010] In one embodiment, the organic acid salt includes at least sodium citrate and sodium gluconate.

[0011] In one embodiment, the mass ratio of sodium citrate to sodium gluconate is (1 - 3):(4 - 7).

[0012] In one embodiment, the mass ratio of sodium citrate to sodium gluconate is 2:(4 - 7).

[0013] The degreasing powder provided by the present invention mainly uses sodium hydroxide to provide an alkaline environment for saponification reaction with grease to clean the oil stains on the metal surface. Further, by introducing inorganic acid salts and organic acid salts, the influence of hard water is alleviated. While improving the degreasing efficiency through alkaline regulation, adsorption, chelation and dispersion effects, it has good corrosion inhibition performance (for steel, iron, copper, etc.), has multi-material compatibility, and meets the use requirements of mechanical fields such as automobiles, electronics, and food. In particular, using sodium carbonate and sodium sulfate with a mass ratio of (4 - 6):(1 - 2) in combination with sodium citrate and sodium gluconate with a mass ratio of (1 - 3):(4 - 7) can reduce the addition amount of polyethylene ether surfactants in the system, reduce raw material costs, and make the provided metal degreasing powder have good water washing effect.

[0014] In one embodiment, the polyethylene ether surfactant is selected from at least one of alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, oleamine polyoxyethylene ether or castor oil polyoxyethylene ether.

[0015] In one embodiment, the polyethylene ether surfactant is alkylphenol polyoxyethylene ether.

[0016] In one embodiment, the alkylphenol polyoxyethylene ether is nonylphenol polyoxyethylene ether or octylphenol polyoxyethylene ether.

[0017] Furthermore, by introducing nonylphenol polyoxyethylene ether, the provided metal degreasing powder meets the process requirements for medium and low temperature use, has excellent emulsifying and dispersing properties, and further ensures the degreasing efficiency and degreasing effect.

[0018] On the other hand, the present invention provides a preparation method of an efficient metal degreasing powder, which at least includes the following steps: stirring and mixing sodium hydroxide, inorganic acid salt, organic acid salt and polyethylene ether surfactant to obtain the efficient metal degreasing powder.

[0019] Beneficial effects

[0020] 1. The present invention provides an efficient metal degreasing powder and its preparation method. By optimizing the degreasing powder formulation system, it effectively balances the degreasing efficiency and cost, and has high market application and promotion value.

[0021] 2. The degreasing powder provided by the present invention mainly relies on sodium hydroxide to provide an alkaline environment for saponification reaction with grease to clean the oil stains on the metal surface. Further, by introducing inorganic salts and organic salts, the influence of hard water is alleviated. Through alkaline adjustment, adsorption, chelation, and dispersion, the degreasing efficiency is improved while having good corrosion inhibition performance (for steel, iron, copper, etc.), and it has multi-material compatibility, meeting the usage requirements in mechanical fields such as automobiles, electronics, and food.

[0022] 3. The present invention uses sodium carbonate and sodium sulfate with a mass ratio of (4 - 6):(1 - 2) in combination with sodium citrate and sodium gluconate with a ratio of (1 - 3):(4 - 7), reducing the addition amount of polyethylene ether surfactants in the system, reducing raw material costs, and enabling the provided metal degreasing powder to have good water washing effect.

[0023] 4. By introducing nonylphenol polyoxyethylene ether, the provided metal degreasing powder meets the process requirements for medium and low temperature use, has excellent emulsification and dispersion performance, and further ensures the degreasing efficiency and degreasing effect.

[0024] 5. The high-efficiency metal degreasing powder provided by the present invention does not contain phosphate components, and can reduce the problem of water body eutrophication after degreasing discharge, better meeting the environmental protection requirements. Description of the Drawings

[0025] Figure 1 It is a physical picture of a high-oil-stain metal part before degreasing treatment (the front and back are the same).

[0026] Figure 2 It is a physical picture of the metal part after degreasing treatment (front).

[0027] Figure 3 It is a physical picture of the metal part after degreasing treatment (back). Detailed Embodiments

[0028] Example 1

[0029] On the one hand, Example 1 of the present invention provides a high-efficiency metal degreasing powder. By weight, the formula is shown in Table 1.

[0030] Table 1

[0031]

[0032] On the other hand, Example 1 of the present invention provides a preparation method of a high-efficiency metal degreasing powder, including the following steps: stirring and mixing sodium hydroxide, inorganic salts, organic salts, and polyoxyethylene ether surfactants to obtain the high-efficiency metal degreasing powder.

[0033] Performance Test

[0034] Degreasing test: 50 g of the high-efficiency degreasing powder provided in Example 1 was dispersed in 1 L of water to obtain a degreasing solution, and the Figure 1 shown high-oil-contaminated metal parts were immersed in the above degreasing solution, and degreasing treatment was carried out at 80 °C for 8 min to obtain the Figure 2 , 3 shown degreased metal parts. By comparing Figure 1 and Figure 2 , Figure 3 it can be seen that the degreasing powder provided in Example 1 of the present application can achieve 100% removal of heavy oil contamination, and the surface quality of the degreased metal parts is high.

Claims

1. An efficient metal degreasing powder, characterized in that By weight, it at least includes 15 - 40 parts of sodium hydroxide, 50 - 75 parts of inorganic acid salt, 5 - 10 parts of organic acid salt, and 1 - 5 parts of polyoxyethylene ether surfactant.

2. The high-efficient metal degreasing powder according to claim 1, characterized in that By weight, the preparation raw materials of the high - efficiency metal degreasing powder at least include: 20 - 30 parts of sodium hydroxide, 60 - 70 parts of inorganic acid salt, 5 - 10 parts of organic acid salt, and 2 - 4 parts of polyoxyethylene ether surfactant.

3. The high-efficiency metal degreasing powder according to claim 1, characterized in that, The inorganic acid salt is selected from at least one of sodium carbonate, sodium sulfate or sodium metasilicate pentahydrate.

4. The high-efficiency metal degreasing powder according to claim 3, characterized in that, The inorganic acid salt is a combination of sodium carbonate and sodium sulfate.

5. The high-efficiency metal degreasing powder according to claim 4, characterized in that The mass ratio of the sodium carbonate to the sodium sulfate is (4 - 6):(1 - 2).

6. The high-efficiency metal degreasing powder according to claim 1, characterized in that, The organic acid salt at least includes sodium citrate and sodium gluconate.

7. The high-efficiency metal degreasing powder according to claim 6, characterized in that, The mass ratio of the sodium citrate to the sodium gluconate is (1 - 3):(4 - 7).

8. The high-efficiency metal degreasing powder according to claim 1, characterized in that, The polyoxyethylene ether surfactant is selected from at least one of alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, oleylamine polyoxyethylene ether or castor oil polyoxyethylene ether.

9. The high-efficiency metal degreasing powder according to claim 8, characterized in that, The alkylphenol polyoxyethylene ether is nonylphenol polyoxyethylene ether or octylphenol polyoxyethylene ether.

10. A method for preparing the high-efficiency metal degreasing powder according to any one of claims 1-9, characterized in that, It at least includes the following steps: Stir and mix sodium hydroxide, inorganic acid salt, organic acid salt, and polyoxyethylene ether surfactant to obtain the high - efficiency metal degreasing powder.

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