Heating-free low-foam energy-saving stainless steel plate strip cleaning agent

Abstract

The invention discloses a heating-free low-foam energy-saving stainless steel plate strip cleaning agent, and belongs to the technical field of cleaning agent production, the heating-free low-foam energy-saving stainless steel plate strip cleaning agent comprises the following steps: S1, preparing 5-15% of fatty acid methyl ester ethoxylate, 5-15% of a special low-foam surfactant, 1-10% of an inorganic base, 2-8% of a solubilizer, 1-5% of a chelating agent and the balance of water; s2, adding water into the reaction kettle, and then starting the reaction kettle for stirring; s3, sequentially adding the inorganic base and the chelating agent into the reaction kettle, stirring at the stirring speed of 800r / s-1000r / s for 20-30 minutes, and raising the temperature in the reaction kettle to 50 DEG C in the stirring process until the solid is completely dissolved; according to the present invention, the cleaning agent has characteristics of low foam and good detergency, can effectively prevent the anti-contamination of the dirt during the cleaning process, has permeation, emulsification and other properties superior to the AEO series, is the substitute of TX, OP and other APEO-containing surfactants, and uses the C8-18 fatty acid methyl ester ethoxylate and special nonionic surfactant mixture, and has characteristics of low foam and good detergency.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning agent production, and in particular relates to a low-foaming energy-saving stainless steel plate and strip cleaning agent that does not require heating. Background Art

[0002] In the production process, alkaline washing is a very important link. The cleaned stainless steel plates can more conveniently enter the subsequent surface treatment process, improve the quality of surface treatment, and finally form high-end stainless steel color-coated plates, stainless steel sandblasted plates, stainless steel corrugated plates and other products, which are widely used in building materials, chemical industry, automobile, electronics industry, arts and crafts and other fields.

[0003] Traditional stainless steel alkaline cleaning agents usually use a combination of strong alkali and anionic surfactants, which need to be heated to 55-65°C to have a good cleaning effect. As the cleaning continues, foam will usually overflow the tank, and defoamers need to be added continuously. Traditional stainless steel cleaning processes usually use relatively large cleaning tanks (more than 5 tons), accompanied by high-pressure spraying, high-speed roller brushes and high cleaning speeds, so traditional cleaning agents face two major problems: high energy consumption and high foam. For this reason, we propose a low-foaming, energy-saving stainless steel strip cleaning agent that does not require heating. Summary of the invention

[0004] The present invention provides a low-foaming energy-saving stainless steel strip cleaning agent that does not require heating, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a low-foaming energy-saving stainless steel strip cleaning agent that does not require heating, comprising the following steps:

[0006] S1. Prepare the raw materials of fatty acid methyl ester ethoxylate 5%-15%, special low-foaming surfactant 5%-15%, inorganic base 1%-10%, solubilizer 2%-8%, chelating agent 1%-5%, and water as the balance;

[0007] S2, adding water to the reactor, and then starting the reactor for stirring;

[0008] S3, inorganic base and chelating agent are added to the reactor in sequence, stirred at a stirring speed of 800r / s-1000r / s for 20min-30min, and during the stirring process, the temperature in the reactor is raised to 50°C until the solid is completely dissolved;

[0009] S4. Then, add fatty acid methyl ester ethoxylate, special low-foaming surfactant and solubilizer into the reactor, stir at a stirring speed of 1000r / s-1200r / s for 25min-30min, and during the stirring process, raise the temperature in the reactor to 50°C until the liquid in the reactor is completely clarified.

[0010] Furthermore, the fatty acid methyl ester ethoxylate is not limited to one or a mixture of multiple fatty acid methyl ester ethoxylates of carbon 8-18.

[0011] Furthermore, the special low-foaming surfactant is not limited to one or a mixture of diethylene glycol, diethylene glycol methyl ether, Solvay Addikleen T2 KD, Evonik TOMAKLEEN G16 AP and Yisa G640.

[0012] Furthermore, the inorganic base is not limited to one or a mixture of multiple of sodium carbonate, sodium metasilicate, sodium silicate, potassium hydroxide and sodium hydroxide.

[0013] Furthermore, the solubilizer is not limited to one or a mixture of multiple selected from the group consisting of modified undecanoic acid, Addikleen HK 30, n-octanoic acid, APGIC06 and AG6206.

[0014] Furthermore, the chelating agent is not limited to one or a mixture of multiple of EDTA-4Na, sodium citrate and sodium gluconate.

[0015] The beneficial effects of the present invention are:

[0016] 1. The carbon 8-18 fatty acid methyl ester ethoxylate used is made of natural vegetable oils and fats. It has excellent cleaning performance under low temperature conditions (below 40°C), especially dispersion power. It can effectively prevent the back-contamination of dirt during the cleaning process. Its penetration and emulsification properties are better than those of the AEO series. It is a substitute for APEO surfactants such as TX and OP.

[0017] 2. It uses a mixture of carbon 8-18 fatty acid methyl ester ethoxylate and a special non-ionic surfactant, both of which are surfactants with low foaming properties and good cleaning power.

[0018] 3. It can achieve the cleaning effect of 55-65℃ of traditional commercial cleaning agents within the working temperature range of 5℃-40℃, and the foam is lower than that of commercial cleaning agents. It can withstand the mechanical action of high-pressure spraying and high-speed brushing without foam overflow. DETAILED DESCRIPTION

[0019] In order to further understand the content, characteristics and effects of the present invention, the following embodiments are listed and described in detail as follows.

[0020] Embodiment 1:

[0021] A low-foaming energy-saving stainless steel strip cleaning agent that does not require heating comprises the following steps;

[0022] S1. Prepare raw materials: 5% sodium metasilicate, 2% sodium hydroxide, 1% sodium citrate, 7% C18 fatty acid methyl ester ethoxylate, 3% diethylene glycol, 2% diethylene glycol methyl ether, 6% APGIC06, 1% Solvay Addikleen T2 KD and 73% water;

[0023] When preparing raw materials, the purity of sodium metasilicate and sodium hydroxide is tested to ensure that the purity of sodium metasilicate meets the requirements and the impurity content is within the allowable range to ensure its stable performance during the cleaning process;

[0024] Sodium hydroxide should be checked for moisture absorption. If it is, it needs to be dried to prevent the introduction of moisture from affecting the accuracy of the cleaning agent ratio.

[0025] C18 fatty acid methyl ester ethoxylate, diethylene glycol, diethylene glycol methyl ether, APGIC06 and Solvay Addikleen T2 KD need to be tested for raw material stability to ensure their stability during storage and use;

[0026] S2, adding 73% water into the reactor, and then starting the reactor to stir at a stirring speed of 500r / s;

[0027] S3. First add 5% sodium metasilicate and 2% sodium hydroxide to the reactor, and stir the 5% sodium metasilicate and 2% sodium hydroxide with the liquid in the reactor for 15 minutes. After the 5% sodium metasilicate and 2% sodium hydroxide are fully mixed with the liquid in the reactor, add 1% sodium citrate to the reactor and stir and mix. Stir at a stirring speed of 900 r / s for 30 minutes. During the stirring process, increase the temperature in the reactor to 50°C until the solid is completely dissolved.

[0028] S4. Before putting 7% C18 fatty acid methyl ester ethoxylate, 3% diethylene glycol, 2% diethylene glycol methyl ether, 6% APGIC06 and 1% Solvay Addikleen T2 KD into the reactor, pre-mix 7% C18 fatty acid methyl ester ethoxylate, 3% diethylene glycol, 2% diethylene glycol methyl ether, 6% APGIC06 and 1% Solvay Addikleen T2 KD to form a mixed liquid, and then add the mixed liquid to the reactor and stir at a stirring speed of 1100 r / s for 30 minutes. During the stirring process, the temperature in the reactor is increased to 50°C until the liquid in the reactor is completely clarified.

[0029] Embodiment 2:

[0030] S1. Prepare raw materials: 74% water, 1% EDTA-4Na, 1% potassium hydroxide, 6% sodium carbonate, 3% gluconic acid, 1% Addikleen HK 30, 1% modified undecyl monobasic acid, 1% n-octanoic acid, 1% C12 fatty acid methyl ester ethoxylate, 2% C16 fatty acid methyl ester ethoxylate, 5% G640, 3% Evonik TOMAKLEEN G16AP and 1% AG 6206;

[0031] S2, adding 74% water into the reactor, and then starting the reactor to stir at a stirring speed of 500r / s;

[0032] S3, adding 1% potassium hydroxide and 6% sodium carbonate into a reactor, and stirring the potassium hydroxide and sodium carbonate with the liquid in the reactor for 15 minutes. After the 1% potassium hydroxide and 6% sodium carbonate are fully mixed with the liquid in the reactor, 3% gluconic acid and 1% EDTA-4Na are added into the reactor, and stirred at a stirring speed of 900 r / s for 30 minutes. During the stirring process, the temperature in the reactor is raised to 50° C. until the solid is completely dissolved;

[0033] S4. Before adding 1% C12 fatty acid methyl ester ethoxylate, 2% C16 fatty acid methyl ester ethoxylate, 5% G640, 3% Evonik TOMAKLEEN G16AP and 1% AG 6206 into the reactor, pre-mix the C12 fatty acid methyl ester ethoxylate, C16 fatty acid methyl ester ethoxylate, G640, Evonik TOMAKLEEN G16AP and AG 6206 to form a mixed liquid, and then add the mixed liquid to the reactor and stir at a stirring speed of 1100 r / s for 30 minutes. During the stirring process, the temperature in the reactor is increased to 50°C until the liquid in the reactor is completely clarified.

[0034] Table 1 - Comparison of data between Example 1-2 and commercially available products

[0035]

[0036]

[0037] The embodiments are superior to commercially available products in low-temperature cleaning ability, ferrous metal protection, corrosion resistance and defoaming performance.

[0038] In this technical solution:

[0039] The carbon 8-18 fatty acid methyl ester ethoxylate used is made of natural plant oils and fats. It has excellent cleaning performance under low temperature conditions (below 40°C), especially dispersion power. It can effectively prevent the back-contamination of dirt during the cleaning process. Its penetration, emulsification and other properties are better than those of the AEO series. It is a substitute for APEO surfactants such as TX and OP.

[0040] The carbon 8-18 fatty acid methyl ester ethoxylate and special nonionic surfactant mixture are both low-foaming surfactants with good cleaning power.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-foaming, energy-saving stainless steel strip cleaning agent that does not require heating, characterized in that: The following steps are involved: S1. Prepare the raw materials of fatty acid methyl ester ethoxylate 5%-15%, special low-foaming surfactant 5%-15%, inorganic base 1%-10%, solubilizer 2%-8%, chelating agent 1%-5%, and the balance water; S2, adding water to the reactor, and then starting the reactor for stirring; S3, inorganic base and chelating agent are added to the reactor in sequence, stirred at a stirring speed of 800r / s-1000r / s for 20min-30min, and during the stirring process, the temperature in the reactor is raised to 50°C until the solid is completely dissolved; S4. Then, add fatty acid methyl ester ethoxylate, special low-foaming surfactant and solubilizer into the reactor, stir at a stirring speed of 1000r / s-1200r / s for 25min-30min, and during the stirring process, raise the temperature in the reactor to 50°C until the liquid in the reactor is completely clarified.

2. The low-foaming energy-saving stainless steel strip cleaning agent that does not require heating according to claim 1 is characterized by: The fatty acid methyl ester ethoxylate is not limited to one or a mixture of multiple fatty acid methyl ester ethoxylates of carbon 8-18.

3. The low-foaming energy-saving stainless steel strip cleaning agent that does not require heating according to claim 1 is characterized by: The special low-foaming surfactant is not limited to one or a mixture of diethylene glycol, diethylene glycol methyl ether, Solvay Addikleen T2 KD, Evonik TOMAKLEEN G16 AP and Yisa G640.

4. The low-foaming energy-saving stainless steel strip cleaning agent that does not require heating according to claim 1 is characterized in that: The inorganic base is sodium carbonate, sodium metasilicate, sodium silicate, potassium hydroxide and sodium hydroxide, but is not limited to one or a mixture of multiple thereof.

5. The low-foaming energy-saving stainless steel strip cleaning agent that does not require heating according to claim 1 is characterized by: The solubilizer is one or more of modified undecanoic acid, Addikleen HK 30, n-octanoic acid, APGIC06 and AG6206, but not limited thereto, and a mixture of multiple thereof.

6. The low-foaming energy-saving stainless steel strip cleaning agent that does not require heating according to claim 1 is characterized by: The chelating agent is EDTA-4Na, sodium citrate and sodium gluconate, but not limited to one or a mixture of multiple thereof.

7. The low-foaming energy-saving stainless steel strip cleaning agent that does not require heating according to claim 1 is characterized by: In S3, the inorganic base is first added to the reactor, and the inorganic base and the liquid in the reactor are stirred for 10-15 minutes. After the inorganic base and the liquid in the reactor are fully mixed, the chelating agent is added to the reactor and stirred and mixed.

8. The low-foaming energy-saving stainless steel strip cleaning agent that does not require heating according to claim 1 is characterized by: In the S4, 7% of C18 fatty acid methyl ester ethoxylate, 3% of diethylene glycol, 2% of diethylene glycol methyl ether, 6% of APGIC06, and 1% of Solvay Addikleen T2 KD are pre-mixed to form a mixed solution, which is then added to the reactor.

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