Deacidification and degumming settling agent for lubricating oil as well as preparation method and application of deacidification and degumming settling agent

Abstract

The invention relates to the technical field of waste lubricating oil treatment, in particular to a lubricating oil deacidification and degumming settling agent and a preparation method and application thereof. The invention relates to a lubricating oil deacidification and degumming settling agent which is prepared from the following raw materials in parts by mass: 90-95 parts of potassium silicate with the mass concentration of 50%, 8-12 parts of calcium-based alkaline mineral powder, 7-9 parts of organic amine, 3-4 parts of a nonionic surfactant, 2-3 parts of a dispersing agent, 50-60 parts of an organic solvent and 20-30 parts of water. According to the deacidification and degumming settling agent for the lubricating oil, a new polymer obtained after the calcium-based alkaline mineral powder and the potassium silicate are combined with the pillared agent for modification and activity excitation is adopted, and the deacidification and degumming settling agent has very high adsorption capacity and ion exchange capacity, can adsorb polar substances such as carboxylic acid and inorganic acid in the waste lubricating oil, and has efficient deacidification and degumming effects; in practice, the acid value of the waste lubricating oil can be reduced from 8mgKOH / g to below 0.01 mgKOH / g by using the acid reducing agent.

Description

Technical Field

[0001] The present application relates to the technical field of waste lubricating oil treatment, and in particular to a lubricating oil deacidification and degumming sedimentation agent, and a preparation method and application thereof. Background Art

[0002] Rolling oil (a kind of lubricating oil) is made of base oil and additives in a certain proportion. The base oil is mainly composed of kerosene-based components of straight-chain alkanes (normal alkanes), and the additives are mainly composed of alcohols and ethers. During the rolling process, the physical and chemical properties of the base oil and additives are slowly changing. The longer the rolling cycle, the greater the degree of change. The specific manifestation is that during the rolling process, due to the volatilization of low-boiling base oil and the introduction of aluminum powder and other substances during the rolling process, the additive content of the rolling oil increases, the initial distillation point of the rolling oil increases, the final distillation point increases, the kinematic viscosity increases, and the acid value increases. Adding new base oil and additives can balance the rolling oil parameters, so that the detection indicators of the rolling oil are controlled within a certain range, ensuring the normal production. In the presence of water, microorganisms, aluminum powder and other substances, some components in the rolling oil have poor chemical stability and are prone to chemical reactions that reduce the quality of the oil. Among them, the acidification of the oil is an indicator of the decline in oil quality. The contaminated oil in the basement ditch has visible water and other turbid substances in the lower layer of the oil. Aluminum powder exists in the rolling oil in the form of suspended matter. The presence of aluminum powder increases the contact area between the oil and water, and increases the reaction area between the oil and water and microorganisms. After a few days of storage, the oil becomes acidic. After the oil mist recovery system and the contaminated oil in the basement ditch are mixed in the contaminated oil recovery tank, there are still visible water, microorganisms, aluminum powder and other substances. After a few days of storage, the oil continues to acidify, and the longer the storage time, the higher the degree of acidification.

[0003] Currently available deacidification, degumming and sedimentation agents cannot efficiently purify rolling oil, especially in the deacidification and degumming of rolling oil, which needs to be further optimized to meet market demand. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present application provides a lubricating oil deacidification, degumming and settling agent and a preparation method and application thereof. The lubricating oil deacidification, degumming and settling agent of the present application adopts a new polymer obtained by modifying calcium-based alkaline mineral powder and potassium silicate with a combined pillaring agent and activating the activity. The new polymer has strong adsorption capacity and ion exchange capacity, can adsorb polar substances such as carboxylic acids, inorganic acids, etc. in waste lubricating oil, has a high-efficiency deacidification and degumming effect, and reduces the acid value of waste lubricating oil from 8 mgKOH / g to below 0.01 mgKOH / g, reaching the technical standard for lubricating oil rolling oil; at the same time, the waste lubricating oil treated with the lubricating oil deacidification, degumming and settling agent prepared by the present application changes from the original light yellow to nearly water white, and does not contain soap glue.

[0005] In the first aspect, the present application provides a lubricating oil deacidification and degumming sedimentation agent, which adopts the following technical solution: A lubricating oil deacidification, degumming and sedimentation agent, the preparation raw materials of which include, by weight: 8-12 parts of calcium-based alkaline mineral powder, 7-9 parts of organic amine, 90-95 parts of potassium silicate with a mass concentration of 50%, 3-4 parts of non-ionic surfactant, 2-3 parts of dispersant, 50-60 parts of organic solvent and 20-30 parts of water, wherein the calcium-based alkaline mineral powder is composed of magnesium silicate and calcium oxide.

[0006] By adopting the above technical scheme, calcium-based alkaline mineral powder: calcium-based alkaline mineral powder is composed of magnesium silicate and calcium oxide. Magnesium silicate is a high-efficiency adsorbent auxiliary material used in chemical production, which can greatly improve the deacidification and degumming effect of waste lubricating oil; calcium oxide can provide an alkaline environment, which is conducive to the adsorption and ion exchange process. Potassium silicate, as an inorganic compound, has good decolorization and degumming effects, and can effectively treat waste lubricating oil. Especially when the waste lubricating oil contains more impurities and pollutants, potassium silicate can help purify the waste lubricating oil through its chemical action, remove the color and colloid components therein, thereby achieving a purification effect. Organic amine: organic amine plays the role of adjusting the pH value in this application, so that the reaction system is kept in a suitable alkaline environment, which is conducive to the adsorption and ion exchange process. Non-ionic surfactant: non-ionic surfactant plays the role of reducing surface tension and increasing wettability in this application, which is conducive to the dispersion and adsorption of calcium-based alkaline mineral powder in waste lubricating oil. Dispersant: dispersant plays the role of preventing calcium-based alkaline mineral powder from aggregating and precipitating in this application, which is conducive to its uniform distribution in waste lubricating oil. Organic solvents: Organic solvents can effectively remove colloidal substances in waste lubricating oils. Water: Water in this application plays the role of adjusting the viscosity of the reaction system and facilitating stirring and reaction. In summary, the lubricating oil deacidification and degumming sedimentation agent of the present application adopts calcium-based alkaline mineral powder and potassium silicate, which are modified by a combined pillaring agent and activated to obtain a new polymer. It has strong adsorption capacity and ion exchange capacity, can adsorb polar substances in waste lubricating oils such as carboxylic acids, inorganic acids, etc., and has a high-efficiency deacidification and degumming effect. At the same time, there is a synergistic effect between the components, which jointly improve the deacidification and degumming effect of waste lubricating oils.

[0007] Preferably, the mass ratio of magnesium silicate to calcium oxide is 3:4.

[0008] By adopting the above technical scheme, magnesium silicate is a highly efficient adsorbent auxiliary material for chemical production, which can greatly improve the deacidification and degumming effect of waste lubricating oil. It can absorb impurities and moisture in waste lubricating oil, thereby improving the quality and performance of lubricating oil. Calcium oxide has a strong alkalinity, which can neutralize the acidic substances in waste lubricating oil and reduce the acid value of waste lubricating oil. At the same time, calcium oxide can also synergize with modified white clay and magnesium silicate to jointly improve the deacidification and degumming effect of waste lubricating oil. The two work together to significantly improve the deacidification and degumming effect of waste lubricating oil. The mass fraction ratio between magnesium silicate and calcium oxide is 3:4, which makes the two play the best synergistic effect in the deacidification and degumming process of waste lubricating oil, thereby achieving the best treatment effect. The color of the waste lubricating oil treated with the lubricating oil deacidification and degumming sedimentation agent prepared by the present application is significantly reduced, such as from the original light yellow to a transparent liquid close to water white, without soap glue, and meets the technical standards for lubricating oil rolling oil. This is due to the synergistic effect between magnesium silicate and calcium oxide, which allows the waste lubricating oil to be effectively treated and improves the quality and performance of the lubricating oil.

[0009] Preferably, the organic amine is selected from at least one of diethylenetriamine, 2-hydroxyethylamine and PETRONAS tri-2-hydroxyethylamine.

[0010] Preferably, the nonionic surfactant is composed of fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and isomeric tridecyl alcohol polyoxyethylene ether in a mass ratio of 6:4:3.

[0011] By adopting the above technical scheme, the role of the nonionic surfactant in this application is mainly to reduce the surface tension of the waste lubricating oil and improve the penetration and dispersibility of the deacidification and degumming sedimentation agent. Fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and lauric acid diethanolamide are composed of a mass ratio of 6:4:3, and the synergistic effect between them is manifested in the following aspects: Fatty alcohol polyoxyethylene ether has strong penetration and emulsification power, which can make polar substances such as carboxylic acids and inorganic acids in waste lubricating oil more easily adsorbed by calcium-based alkaline mineral powder, thereby improving the deacidification and degumming effect. Polyoxyethylene (10) tridecyl ether has good wettability and dispersibility, which can improve the dispersibility of the deacidification and degumming sedimentation agent in the waste lubricating oil and make it work more evenly. Lauric acid diethanolamide has excellent foaming properties and can produce abundant foam in the process of waste lubricating oil treatment, which is conducive to the full contact of polar substances such as carboxylic acids and inorganic acids with calcium-based alkaline mineral powder, thereby improving the deacidification and degumming effect. In summary, the synergistic effect between fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and lauric acid diethanolamide can improve the performance of the waste lubricating oil deacidification and degumming sedimentation agent, making it have a better deacidification and degumming effect.

[0012] Preferably, the dispersant is at least one of octadecyldimethylhydroxyethyl quaternary ammonium nitrate, hexadecyltrimethylammonium bromide and behenyltrimethylammonium chloride.

[0013] Preferably, the dispersant is composed of octadecyldimethylhydroxyethyl quaternary ammonium nitrate, hexadecyltrimethylammonium bromide and behenyltrimethylammonium chloride in a mass ratio of 3:1:2.

[0014] By adopting the above technical scheme, octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate is a cationic surfactant with strong adsorption and emulsification capacity, which can effectively disperse impurities in waste lubricating oil into the water phase and improve the deacidification and degumming effect; hexadecyl trimethyl ammonium bromide is a nonionic surfactant that can increase the fluidity of waste lubricating oil and promote the sedimentation and separation of impurities; docosyl trimethyl ammonium chloride is an anionic surfactant that can form a stable complex with calcium-based alkaline mineral powder to enhance its adsorption capacity and ion exchange capacity. The function of the dispersant is to disperse the impurities in the waste lubricating oil into the water phase, promote the sedimentation and separation of impurities, and thus improve the deacidification and degumming effect. At the same time, the dispersant also has a synergistic effect, that is, octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, hexadecyl trimethyl ammonium bromide and docosyl trimethyl ammonium chloride interact with each other to form a stable complex, further enhancing its adsorption capacity and ion exchange capacity, and improving the deacidification and degumming effect.

[0015] Preferably, the organic solvent is n-heptane.

[0016] In a second aspect, the present application provides a method for preparing a lubricating oil deacidification and degumming sedimentation agent, which adopts the following technical scheme: As a general technical concept, the present application also provides a method for preparing the above-mentioned lubricating oil deacidification and degumming sedimentation agent, comprising the following steps: S91, mixing an organic amine, a nonionic surfactant, a dispersant, an organic solvent and water uniformly according to their weight proportions to prepare a combined pillaring agent; S92. Evenly mix the calcium-based alkaline mineral powder, potassium silicate with a mass concentration of 50%, and the combined pillaring agent according to their mass fractions, then heat to 80-90° C., react for 5-6 hours, and cool to room temperature to obtain a lubricating oil deacidification and degumming sedimentation agent.

[0017] By adopting the above technical scheme, the new polymer obtained after the calcium-based alkaline mineral powder is modified by the combined pillaring agent and activated has strong adsorption and ion exchange capacity, and can adsorb polar substances in the lubricating oil such as carboxylic acid, inorganic acid, etc., to achieve the purpose of efficient deacidification and degumming.

[0018] In the third aspect, the present application provides an application of a lubricating oil deacidification, degumming and sedimentation agent, adopting the following technical scheme: As a general technical concept, the present application also provides the application of the above-mentioned lubricating oil deacidification, degumming and sedimentation agent in lubricating oil, characterized in that it includes the following process steps: collecting and sedimenting the lubricating oil liquid → draining and slag → extracting the upper part to the reaction tank and adding the deacidification, degumming and sedimentation agent → stirring and reacting → sedimentation again → draining and slag → initial filtration and flash evaporation to remove light components, remove odor, and dehydrate → circulating filtration → fine filtration → finished product.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: The lubricating oil deacidification and degumming sedimentation agent of the present application has the following beneficial technical effects: 1. High-efficiency deacidification and degumming effect: The new polymer obtained by modifying calcium-based alkaline mineral powder and potassium silicate with a combined pillaring agent and activating the activity has a strong adsorption capacity and ion exchange capacity. It can adsorb polar substances such as carboxylic acids and inorganic acids in waste lubricating oil, greatly reducing the acid value of waste lubricating oil, such as from 8mgKOH / g to below 0.01mgKOH / g, meeting the technical standards for lubricating oil.

[0020] 2. Clear and transparent: The color of the waste lubricating oil treated with the lubricating oil deacidification and degumming sedimentation agent prepared in this application is significantly reduced, such as changing from the original light yellow to a transparent liquid close to water white, without soap glue, thereby improving the quality and recycling value of the waste lubricating oil.

[0021] 3. Excellent deacidification and degumming effect: Calcium-based alkaline mineral powder is composed of magnesium silicate and calcium oxide. The synergistic effect of magnesium silicate and calcium oxide is used to significantly improve the deacidification and degumming effect of waste lubricating oil.

[0022] 4. Environmental protection and energy saving: The lubricating oil deacidification and degumming sedimentation agent of the present application adopts natural minerals and organic compounds as raw materials, is environmentally friendly, has a simple preparation process and low energy consumption.

[0023] 5. Reduce costs: The lubricating oil deacidification and degumming sedimentation agent of the present application can effectively reduce the cost of waste lubricating oil treatment, increase the recycling rate of waste lubricating oil, and has certain economic benefits. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below in conjunction with the examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present application and should not be considered as limiting the scope of the present application. In the examples, if specific conditions are not specified, they are carried out according to normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0025] In the following examples, 1 portion means 50 g.

[0026] Example 1 A lubricating oil deacidification, degumming and sedimentation agent, wherein the raw materials for preparation include, by weight: 8 parts of calcium-based alkaline mineral powder, 7 parts of diethylenetriamine, 90 parts of potassium silicate with a mass concentration of 50%, 3 parts of nonionic surfactant, 2 parts of dispersant, 50 parts of n-heptane, and 20 parts of water, wherein the calcium-based alkaline mineral powder is composed of magnesium silicate and calcium oxide in a mass ratio of 3:4, the nonionic surfactant is composed of fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and isomeric tridecyl alcohol polyoxyethylene ether in a mass ratio of 6:4:3, and the dispersant is octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate; The above-mentioned method for preparing a lubricating oil deacidification and degumming sedimentation agent comprises the following steps: S91. Mix diethylenetriamine, a nonionic surfactant, a dispersant, n-heptane and water in parts by mass to obtain a combined pillaring agent; S92. Evenly mix the calcium-based alkaline mineral powder, potassium silicate with a mass concentration of 50%, and the combined pillaring agent according to their mass fractions, then heat to 80° C., react for 6 hours, and cool to room temperature to obtain a lubricating oil deacidification and degumming sedimentation agent.

[0027] Example 2 A lubricating oil deacidification, degumming and sedimentation agent, wherein the raw materials for preparation include, by weight: 12 parts of calcium-based alkaline mineral powder, 9 parts of 2-hydroxyethylamine, 95 parts of potassium silicate with a mass concentration of 50%, 4 parts of nonionic surfactant, 3 parts of dispersant, 60 parts of n-heptane, and 30 parts of water, wherein the calcium-based alkaline mineral powder is composed of magnesium silicate and calcium oxide in a mass ratio of 3:4, the nonionic surfactant is composed of fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and isomeric tridecyl alcohol polyoxyethylene ether in a mass ratio of 6:4:3, and the dispersant is hexadecyl trimethylammonium bromide; The above-mentioned method for preparing a lubricating oil deacidification and degumming sedimentation agent comprises the following steps: S91, mixing 2-hydroxyethylamine, a nonionic surfactant, a dispersant, n-heptane and water in parts by mass to obtain a combined pillaring agent; S92. Evenly mix the calcium-based alkaline mineral powder, potassium silicate with a mass concentration of 50%, and the combined pillaring agent according to their mass fractions, then heat to 90° C., react for 5 hours, and cool to room temperature to obtain a lubricating oil deacidification and degumming sedimentation agent.

[0028] Example 3 A lubricating oil deacidification and degumming sedimentation agent, wherein the raw materials for preparation include, by weight: 10 parts of calcium-based alkaline mineral powder, 8 parts of Petronas tri-2-hydroxyethylamine, 93 parts of potassium silicate with a mass concentration of 50%, 3.5 parts of nonionic surfactant, 2.5 parts of dispersant, 55 parts of n-heptane, and 25 parts of water, wherein the calcium-based alkaline mineral powder is composed of magnesium silicate and calcium oxide in a mass ratio of 3:4, the nonionic surfactant is composed of fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and isomeric tridecyl alcohol polyoxyethylene ether in a mass ratio of 6:4:3, and the dispersant is behenyl trimethyl ammonium chloride; The above-mentioned method for preparing a lubricating oil deacidification and degumming sedimentation agent comprises the following steps: S91, mixing PETRONAS tris 2-hydroxyethylamine, a nonionic surfactant, a dispersant, n-heptane and water in parts by mass to obtain a combined pillaring agent; S92. Evenly mix the calcium-based alkaline mineral powder, potassium silicate with a mass concentration of 50%, and the combined pillaring agent according to their mass fractions, then heat to 85° C., react for 5.5 hours, and cool to room temperature to obtain a lubricating oil deacidification and degumming sedimentation agent.

[0029] Example 4 The method is the same as Embodiment 3, except that the dispersant is composed of octadecyldimethylhydroxyethyl quaternary ammonium nitrate, hexadecyltrimethylammonium bromide and behenyltrimethylammonium chloride in a mass ratio of 3:1:2.

[0030] Comparative Example 1 The same as Example 4, except that the calcium-based alkaline mineral powder is magnesium silicate.

[0031] Comparative Example 2 The same as Example 4, except that the calcium-based alkaline mineral powder is calcium oxide.

[0032] Comparative Example 3 The same as Example 4, except that the nonionic surfactant is fatty alcohol polyoxyethylene ether.

[0033] Comparative Example 4 The same as Example 4, except that the nonionic surfactant is polyoxyethylene (10) tridecyl ether.

[0034] Comparative Example 5 The same as Example 4, except that the nonionic surfactant is isomeric tridecanol polyoxyethylene ether.

[0035] Performance testing Test Example 1 The lubricating oil deacidification and degumming sedimentation agents prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were sampled and the experiment was conducted in the following manner: 100 kg of waste lubricating oil base oil was pumped into the reaction tank, the stirrer was started, and 1.5 kg of lubricating oil deacidification and degumming sedimentation agent was slowly added at a speed of 60 rpm. After the addition, stirring was continued for 20 minutes, stirring was stopped, and the tank was left standing for 4 hours. The material in the tank was automatically separated into the upper layer of regenerated lubricating oil base oil, the lower layer of water and soap glue, and the lower layer of water and soap glue. The lower layer of water and soap glue was released from the glass viewing cup at the bottom of the tank to obtain the upper layer of finished regenerated lubricating oil base oil, and the following tests were conducted. The test results are shown in Table 1.

[0036] Closed cup flash point: tested in accordance with GB / T 3536 standard; Acid value determination: Tested in accordance with GB / T 4945-2002 standard; Mechanical impurities: tested in accordance with G GB / T 511 standard; Gel determination: Tested according to SYT 7550-2004 standard; Table 1 Performance test Test Example 2 The lubricating oil deacidification and degumming sedimentation agents prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were sampled and the experiment was conducted in the following manner: 100 kg of waste lubricating oil base oil was pumped into the reaction tank, the stirrer was started, and 1.5 kg of lubricating oil deacidification and degumming sedimentation agent was slowly added at a speed of 60 rpm. After the addition, stirring was continued for 20 minutes, stirring was stopped, and the tank was left standing for 4 hours. The material in the tank was automatically separated into the upper layer of regenerated lubricating oil base oil, the lower layer of water and soap glue, and the lower layer of water and soap glue. The lower layer of water and soap glue was released from the glass viewing cup at the bottom of the tank to obtain the upper layer of finished regenerated lubricating oil base oil, and the following tests were conducted. The test results are shown in Table 2.

[0037] Closed cup flash point: tested in accordance with GB / T 3536 standard; Acid value determination: Tested in accordance with GB / T 4945-2002 standard; Mechanical impurities: tested in accordance with G GB / T 511 standard; Gel determination: Tested according to SYT 7550-2004 standard; Table 2 Performance test Analyzing the data in Tables 1 and 2, we can see that: 1) The lubricating oil deacidification, degumming and settling agent prepared in Examples 1 to 4 is a new polymer obtained by modifying calcium-based alkaline mineral powder and potassium silicate with a combined pillaring agent and activating the activity. It has strong adsorption capacity and ion exchange capacity, can adsorb polar substances such as carboxylic acids, inorganic acids, etc. in waste lubricating oil, and has a high-efficiency deacidification and degumming effect, which can reduce the acid value of waste lubricating oil from 8.0 mgKOH / g to below 0.01 mgKOH / g, and reduce the colloid from 149.5 mg / 100 mL to within 23 mg / 100 mL, meeting the technical standards of lubricating oil base oil; at the same time, the waste lubricating oil treated with the lubricating oil deacidification, degumming and settling agent prepared in this application can not only reduce the acid value of the oil, but also change the color of the oil from dark to light, and the transparency and transmittance of the oil are significantly improved.

[0038] 3) The performance comparison analysis of the lubricating oil deacidification, degumming and settling agent prepared in combination with Example 4 and Comparative Examples 1-2 shows that the mass fraction ratio between magnesium silicate and calcium oxide is 3:4. This ratio enables the two to play the best synergistic role in the deacidification and degumming process of waste lubricating oil, thereby achieving the best treatment effect. The color of the waste lubricating oil treated with the lubricating oil deacidification, degumming and settling agent prepared by the present application is significantly reduced, such as from the original light yellow to a transparent liquid close to water white, without soap glue, and meets the technical standards for lubricating oil rolling oil. This is due to the synergistic effect between magnesium silicate and calcium oxide, which effectively treats the waste lubricating oil and improves the quality and performance of the lubricating oil.

[0039] 3) The performance comparison analysis of the lubricating oil deacidification and degumming sedimentation agent prepared in combination with Example 4 and Comparative Examples 3-5 shows that the nonionic surfactant is composed of fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and isomeric tridecyl alcohol polyoxyethylene ether in a mass ratio of 6:4:3. The role of the nonionic surfactant in this application is mainly to reduce the surface tension of the waste lubricating oil and improve the penetration and dispersibility of the deacidification and degumming sedimentation agent. The synergistic effect between fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and lauric acid diethanolamide is manifested in the following aspects: fatty alcohol polyoxyethylene ether has strong penetration and emulsification power, which can make polar substances such as carboxylic acids and inorganic acids in waste lubricating oil more easily adsorbed by calcium-based alkaline mineral powder, thereby improving the deacidification and degumming effect. Polyoxyethylene (10) tridecyl ether has good wettability and dispersibility, which can improve the dispersibility of the deacidification and degumming sedimentation agent in waste lubricating oil and make it work more evenly. Lauric acid diethanolamide has excellent foaming properties and can produce abundant foam in the process of waste lubricating oil treatment, which is beneficial for polar substances such as carboxylic acid and inorganic acid to fully contact with calcium-based alkaline mineral powder, thereby improving the deacidification and degumming effect. In summary, the synergistic effect between fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and lauric acid diethanolamide can improve the performance of waste lubricating oil deacidification and degumming sedimentation agent, making it have better deacidification and degumming effect.

[0040] The above embodiments are only used to explain the technical solutions of the present application rather than to limit them. Although the above embodiments provide a specific description of the present application, relevant technical personnel should understand that the specific implementation methods of the present application can still be modified or replaced by equivalents, and any modifications and equivalent replacements that do not depart from the spirit and scope of the present application should be included in the protection scope of the present application.

Claims

1. A lubricating oil deacidification and degumming sedimentation agent, characterized in that: The raw materials for preparation include, by weight: 8-12 parts of calcium-based alkaline mineral powder, 7-9 parts of organic amine, 90-95 parts of potassium silicate with a mass concentration of 50%, 3-4 parts of non-ionic surfactant, 2-3 parts of dispersant, 50-60 parts of organic solvent, and 20-30 parts of water, wherein the calcium-based alkaline mineral powder is composed of magnesium silicate and calcium oxide.

2. A lubricating oil deacidification and degumming sedimentation agent according to claim 1, characterized in that: The mass ratio of the magnesium silicate to calcium oxide is 3:

4.

3. The lubricating oil deacidification and degumming sedimentation agent according to claim 1, characterized in that: The organic amine is selected from at least one of diethylenetriamine, 2-hydroxyethylamine and PETRONAS tri-2-hydroxyethylamine.

4. The lubricating oil deacidification and degumming sedimentation agent according to claim 1, characterized in that: The nonionic surfactant is composed of fatty alcohol polyoxyethylene ether, polyoxyethylene (10) tridecyl ether and isomeric tridecyl alcohol polyoxyethylene ether in a mass ratio of 6:4:

3.

5. The lubricating oil deacidification and degumming sedimentation agent according to claim 1, characterized in that: The dispersant is at least one of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, hexadecyl trimethyl ammonium bromide and behenyl trimethyl ammonium chloride.

6. The lubricating oil deacidification and degumming sedimentation agent according to claim 1, characterized in that: The dispersant is composed of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, hexadecyl trimethyl ammonium bromide and behenyl trimethyl ammonium chloride in a mass ratio of 3:1:

2.

7. The lubricating oil deacidification and degumming sedimentation agent according to claim 1, characterized in that: The organic solvent is n-heptane.

8. A method for preparing a lubricating oil deacidification, degumming and sedimentation agent as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S81. Mixing organic amine, nonionic surfactant, dispersant, organic solvent and water uniformly according to their weight proportions to prepare a combined pillaring agent; S82. Evenly mix the calcium-based alkaline mineral powder, 50% potassium silicate and the combined pillaring agent according to their mass fractions, then heat to 80-90°C, react for 5-6 hours, and cool to room temperature to obtain a lubricating oil deacidification and degumming sedimentation agent.

9. Use of a lubricating oil deacidification, degumming and settling agent as claimed in any one of claims 1 to 7 in lubricating oil, characterized in that: The process includes the following steps: collecting and settling lubricating oil → draining and slag removal → extracting the upper part to the reaction tank and adding a deacidification and degumming settling agent → stirring and reacting → settling again → draining and slag removal → initial filtration and flash evaporation to remove light components, remove odor, and dehydrate → circulating filtration → fine filtration → finished product.

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