High-fluidity lanolin magnesium soap complexing agent oil product and preparation method thereof

Abstract

The embodiment of the application provides a high-fluidity lanolin magnesium soap compound agent oil product and a preparation method thereof, and relates to the technical field of rust-proof oil.The high-fluidity lanolin magnesium soap compound agent oil product is composed of the following components in parts by weight: lanolin magnesium soap: 2.5-3.5 parts; barium heavy alkyl benzene sulfonate: 5.0-7.0 parts; 75SN neutral oil: 1.5-2.5 parts; wherein the lanolin magnesium soap is a fatty acid magnesium product obtained by saponification reaction of natural lanolin to generate sodium fatty acid and then replacement reaction with magnesium ions.The application improves the fluidity of the product, improves the rust-proof performance by scientific compounding of the lanolin magnesium soap, barium heavy alkyl benzene sulfonate and 75SN neutral oil, and realizes stable manufacturing of the rust-proof oil product with high fluidity, long-acting rust-proof and suitable for industrial application by using the preparation method with mild process conditions, easily available raw materials and easy scale production.

Description

Technical Field

[0001] This application relates to the field of rust-preventive oil technology, and more specifically, to a high-flowability lanolin magnesium soap compound oil and its preparation method. Background Technology

[0002] Lanolin magnesium soap, a classic rust inhibitor, forms a dense adsorption film on metal surfaces due to its polar groups and long-chain hydrocarbon groups, effectively blocking moisture and oxygen and exhibiting excellent rust-preventing properties. It is widely used for the sealing and protection of metal products such as machinery and precision instruments. However, the finished product generally suffers from high viscosity and poor flowability, often existing in a semi-solid or highly viscous state, making it difficult to coat evenly and unsuitable for industrial applications such as spraying and dipping, thus limiting its practical use.

[0003] To improve fluidity, existing technologies often involve adding organic solvents or diluents for blending. However, these additives can easily lead to a decrease in oil film strength, reduced residue after evaporation, and even damage to the stability of the rust-inhibiting components, affecting the rust-inhibiting effect and making it difficult to balance fluidity and protective performance. Some modification methods also suffer from complex processes and high costs, which are not conducive to large-scale production.

[0004] Furthermore, barium heavy alkylbenzene sulfonate is a commonly used petroleum additive that combines rust prevention and dispersibility. Its long-chain alkyl group has a viscosity-reducing effect, while the aromatic barium sulfonate structure is conducive to adsorption on metal surfaces. Theoretically, it has the potential to synergistically enhance the effect of lanolin magnesium soap. However, there is currently no systematic research or patent report on the use of the two in combination to improve the fluidity and overall performance of rust-preventive oil, and its synergistic mechanism has not been disclosed.

[0005] Therefore, there is an urgent need to develop a compound rust-preventive oil composition with good fluidity, excellent rust prevention performance and simple processing to overcome the shortcomings of existing technologies. Summary of the Invention

[0006] To achieve the above objectives, in one aspect, the present invention provides a high-flowability lanolin magnesium soap compound oil, which is composed of the following components in parts by weight: Lanolin magnesium soap: 2.5-3.5 parts; Barium heavy alkylbenzene sulfonate: 5.0-7.0 parts; 75SN neutral oil: 1.5-2.5 parts; The lanolin magnesium soap is a magnesium fatty acid product obtained by saponifying natural lanolin to produce sodium fatty acid, followed by a substitution reaction with magnesium ions. The barium heavy alkylbenzene sulfonate is an aromatic barium sulfonate salt with long-chain alkyl substituents having fourteen to twenty carbon atoms. The 75SN neutral oil is a refined mineral base oil with a kinematic viscosity of 100–120 mmHg at 40°C. 2 / s serves as the dispersion medium for the system.

[0007] Furthermore, the weight ratios between the components are as follows: Lanolin magnesium soap: barium heavy alkylbenzene sulfonate: 75SN neutral oil = 3:6:2.

[0008] Furthermore, the lanolin magnesium soap is a product prepared by a method comprising the following steps: Lanolin is mixed with water and an aqueous sodium hydroxide solution and refluxed at 90–95°C for 4 hours to produce sodium fatty acid. Then, magnesium sulfate solution is added and an ion exchange reaction is carried out at 60–75°C to convert it into magnesium fatty acid. The sodium salt impurities are then removed by high-temperature water washing, and pure lanolin magnesium soap product is obtained by vacuum dehydration.

[0009] Furthermore, on the other hand, the present invention also provides a method for preparing a high-flowability lanolin magnesium soap compound oil, comprising the lanolin magnesium soap compound oil described in any one of the above, comprising the following steps: Step 1, Saponification reaction stage: Weigh 45kg lanolin, 20kg water and 30% sodium hydroxide aqueous solution added according to stoichiometry, put them into a reaction vessel equipped with a stirrer and a reflux condenser, stir evenly and heat to 90-95℃, react under reflux for 4 hours to completely convert the free fatty acids in lanolin into sodium fatty acids. After the reaction is completed, add 300kg water to dilute and obtain a saponified liquid with good fluidity. Step 2, Displacement reaction stage: Dissolve 24 kg of magnesium sulfate in 72 kg of water and stir until completely dissolved to form a clear solution. Slowly add the clear solution dropwise to the saponification solution obtained in Step 1. Stir at 150 r / min at 60℃ for 15 minutes to fully mix the reaction system. Then raise the temperature to 72℃ and keep the reaction for 30 minutes to complete the ion exchange process from sodium fatty acid to magnesium fatty acid. Step 3, Purification and Washing Stage: Transfer the material after the displacement reaction to a washing container and wash it five times with deionized water at 75°C, using about 80 kg of water each time. After each wash, allow it to stand and separate into layers and completely drain the aqueous phase until the last wash water is neutral and has a conductivity of less than 10 μS / cm, so that water-soluble byproducts such as sodium sulfate are effectively removed. Step 4, Compounding and Dehydration Stage: Add 60 kg of barium heavy alkylbenzene sulfonate and 20 kg of 75SN neutral oil to the washed lanolin magnesium soap material. Stir in an atmospheric pressure stirred tank at a speed of 100–200 r / min for 30 minutes to fully disperse and mix the components. Then heat the mixture to 100℃ and dehydrate it for 2 hours under a vacuum of not less than 0.08 MPa. After cooling, the target product is obtained.

[0010] Furthermore, the amount of each raw material can be adjusted within the following ranges: Lanolin: 40–50 kg; Water used for saponification: 15–25 kg; 30% sodium hydroxide aqueous solution: The amount to be added is determined by stoichiometry based on the total acid value in lanolin to ensure complete saponification of fatty acids; Magnesium sulfate: 20–28 kg; Water used for preparing magnesium sulfate solution: 60–80 kg; Deionized water: 350–450 kg; Barium heavy alkylbenzene sulfonate: 55–65 kg; 75SN neutral oil: 18–22 kg.

[0011] Furthermore, the saponification reaction in step one is carried out in the temperature range of 90–95℃, preferably 92±2℃, and the reaction time is 4 hours±10 minutes. During the reaction, the reflux state must be maintained. The concentration of sodium hydroxide aqueous solution is 25–35%, preferably 30%, and it is added slowly dropwise to avoid local over-alkaliness leading to side reactions.

[0012] Furthermore, in step two, the magnesium sulfate solution is added at a rate controlled within 10–15 minutes. During the addition, the stirring rate is maintained at 150±10 r / min, the initial reaction temperature is 60±2℃, and after the addition is complete, the temperature is raised to 72±3℃ and kept at that temperature for 30±5 minutes to ensure that the ion replacement reaction proceeds fully. The reaction endpoint is determined by detecting that the sodium ion concentration in the aqueous phase no longer changes.

[0013] Furthermore, in step three, the washing operation adopts a counter-current method, using 70–90 kg of deionized water each time, maintaining the water temperature at 75±5℃, and allowing the water to stand for at least 20 minutes after each wash to ensure thorough water separation. The washing is performed at least 5 times, and the final washing water has a pH value of 6.5–7.5 and a conductivity of ≤10μS / cm.

[0014] Furthermore, the compounding stage in step four is carried out under normal pressure. An anchor-type stirrer is used as the stirring equipment, the stirring rate is controlled within the range of 100–200 r / min, and the stirring time is not less than 30 minutes, so that the lanolin magnesium soap, barium heavy alkylbenzene sulfonate and 75SN neutral oil can be uniformly dispersed at the microscale to form a stable homogeneous system.

[0015] Furthermore, the dehydration process in step four is carried out in a vacuum drying system, with a heating temperature of 100±2℃, a vacuum degree controlled between 0.08–0.095MPa, and a dehydration time of 2 hours±10 minutes. During the dehydration process, continuous stirring is carried out to promote the release of moisture. After the dehydration is completed, the product is naturally cooled to room temperature, discharged and packaged, and the resulting product is sealed and stored in a light-proof and dry environment.

[0016] 1. The beneficial effects of this application are as follows: By scientifically compounding lanolin magnesium soap with barium heavy alkylbenzene sulfonate and 75SN neutral oil, the viscosity-reducing effect of the long-chain alkyl groups in the barium heavy alkylbenzene sulfonate molecule and the dispersion and dilution function of the 75SN base oil are fully utilized. The synergistic effect of the two effectively reduces the high viscosity of the traditional lanolin magnesium soap system. The resulting compound oil has a dynamic viscosity of 800–1000 mPa·s at 25°C, which is lower than the 2000–3000 mPa·s of conventional lanolin magnesium soap products. The fluidity is greatly improved. This characteristic makes this product suitable for various industrial construction methods such as spraying, dipping, and brushing. It overcomes the problems of uneven coating and difficult operation caused by the poor fluidity of traditional products, improves fluidity, and enhances the applicability of construction.

[0017] 2. The beneficial effects of this application are: the use of a dual rust-preventive system of lanolin magnesium soap and barium heavy alkylbenzene sulfonate forms a dense and stable composite adsorption film on the metal surface, which has excellent oil solubility, film-forming properties and water displacement resistance. This excellent rust-preventive performance is especially suitable for long-term storage and protection of metal products in harsh environments such as high humidity and high salt spray. It has excellent rust-preventive performance and long-term damp heat protection capability.

[0018] 3. The beneficial effects of this application are: The preparation method adopted by this invention is based on conventional chemical unit operations, including steps such as saponification, displacement, washing, compounding and dehydration. The reaction conditions are mild, no high temperature and high pressure or special catalysts are required, the equipment is highly versatile, the operation is safe and controllable, and the raw materials such as lanolin, sodium hydroxide, magnesium sulfate, barium heavy alkylbenzene sulfonate and 75SN neutral oil are all industrially available chemicals with controllable costs. The entire process flow is reasonably designed, the parameters of each step are clear, the product quality is stable and reproducible, and it is easy to achieve continuous and large-scale production. It has good prospects for industrial application and market promotion value.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a block diagram of the overall composition formula according to the embodiments of this application; Figure 2 This is a process flow diagram for preparing lanolin magnesium soap according to embodiments of this application; Figure 3 This is a process flow diagram of compounding and dehydration according to an embodiment of this application; Figure 4 This is a process flow diagram of the saponification reaction according to an embodiment of this application; Figure 5 This is a flow chart of the replacement and washing process according to an embodiment of this application. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0023] The following description, with reference to the accompanying drawings, illustrates a high-flowability lanolin magnesium soap compound oil and its preparation method according to embodiments of this application.

[0024] like Figures 1-5 As shown, a high-flowability lanolin magnesium soap compound oil according to an embodiment of this application is composed of the following components in parts by weight: Lanolin magnesium soap: 2.5-3.5 parts; Barium heavy alkylbenzene sulfonate: 5.0-7.0 parts; 75SN neutral oil: 1.5-2.5 parts; The lanolin magnesium soap is a magnesium fatty acid product obtained by saponifying natural lanolin to produce sodium fatty acid, followed by a substitution reaction with magnesium ions. The barium heavy alkylbenzene sulfonate is an aromatic barium sulfonate salt with long-chain alkyl substituents having fourteen to twenty carbon atoms. The 75SN neutral oil is a refined mineral base oil with a kinematic viscosity of 100–120 mmHg at 40°C. 2 / s serves as the dispersion medium for the system.

[0025] The weight ratios of the components are as follows: Lanolin magnesium soap: barium heavy alkylbenzene sulfonate: 75SN neutral oil = 3:6:2.

[0026] Lanolin magnesium soap is a product prepared by a method including the following steps: Lanolin is mixed with water and an aqueous sodium hydroxide solution and refluxed at 90–95°C for 4 hours to produce sodium fatty acid. Then, magnesium sulfate solution is added and an ion exchange reaction is carried out at 60–75°C to convert it into magnesium fatty acid. The sodium salt impurities are then removed by high-temperature water washing, and pure lanolin magnesium soap product is obtained by vacuum dehydration.

[0027] On the other hand, the present invention also provides a method for preparing a high-flowability lanolin magnesium soap compound oil, comprising the following steps: Step 1: Saponification Reaction Stage Weigh 45 kg of natural lanolin, 20 kg of deionized water, and 30% sodium hydroxide aqueous solution, and put them into a stainless steel reactor equipped with a mechanical stirrer, heating jacket, and reflux condenser. The amount of sodium hydroxide aqueous solution added is precisely calculated according to the actual total acid value of the lanolin based on the stoichiometric ratio to ensure that the free fatty acids are completely converted into sodium fatty acids.

[0028] To avoid side reactions such as ester bond hydrolysis or soap coking caused by excessively high local alkali concentration, sodium hydroxide aqueous solution is added slowly dropwise, with the addition time controlled within 15–30 minutes. It is preferable to use a metering pump or a high-level dropping funnel for continuous and uniform feeding.

[0029] After the material is added, start the stirring system and set the speed to 100–150 r / min to ensure that the material is fully mixed. Then turn on the heating system and slowly raise the temperature to 90–95°C at a rate of 1–2°C per minute. The preferred reaction temperature is 92±2°C. Once the temperature reaches the set range, start the cooling water circulation to maintain a reflux state and prevent the loss of moisture and low-boiling-point components through evaporation.

[0030] The reaction was continued at this temperature for 4 hours ± 10 minutes, with stirring maintained to ensure uniform heat and mass transfer. The reaction progress could be judged by sampling and detecting the pH value or free alkali content of the system. When the pH stabilized at 9–10 and no unreacted acid was present, the saponification reaction was considered complete. After the reaction, the system was a brownish-yellow, homogeneous liquid with good fluidity, indicating that the fatty acids had been basically converted into sodium fatty acids.

[0031] To reduce the viscosity of the system and facilitate subsequent ion exchange operations, 300 kg of deionized water was added to the reaction solution for dilution. The dilution process was carried out under stirring conditions, with the stirring speed maintained at 80–100 r / min. After dilution, a saponified solution with excellent flowability and no clumping or stratification was obtained.

[0032] The sample is transferred to the next process for later use. This temperature range ensures both the saponification reaction rate and the decomposition of heat-sensitive components. The time has been experimentally verified to be the shortest effective time to achieve complete conversion. The sodium hydroxide concentration of 25–35% (preferably 30%) is the optimal balance point between the amount of water introduced and the reaction efficiency. The dropping method and reflux device ensure a stable reaction environment. All parameters are derived from extensive experimental optimization, resulting in a stable process with strong repeatability.

[0033] Step 2: Displacement Reaction Stage Add 24 kg of magnesium sulfate heptahydrate to 72 kg of deionized water and stir at 150 r / min at room temperature until completely dissolved to form a colorless, transparent, and precipitate-free clear solution. Then, slowly add the magnesium sulfate solution dropwise to the saponification solution obtained in step one. The dropwise addition time is strictly controlled within 10–15 minutes to avoid violent exothermic reaction or excessively high local concentration, which may cause the system to separate or form insoluble flocculent matter.

[0034] During the dropwise addition process, the temperature inside the reactor was maintained at 60±2℃, and the stirring rate was maintained at 150±10r / min to ensure uniform mixing of the materials and promote ion exchange between magnesium ions and sodium fatty acids. After the dropwise addition was completed, stirring was continued for 15 minutes to ensure full contact of the reaction system. Then, the materials were heated to 72±3℃ at a heating rate of 1–2℃ per minute and kept at this temperature for 30±5 minutes to ensure that the sodium ions in the sodium fatty acids were fully replaced by magnesium ions to form a bimolecular structure of magnesium fatty acid product.

[0035] During the reaction, sodium ion concentration can be periodically sampled from the aqueous phase. When there is no significant change in two consecutive test results, the reaction is considered to be at its endpoint, indicating that the ion replacement is basically complete. The entire replacement process is carried out under normal pressure. The equipment is a stainless steel reactor with temperature control and stirring functions, equipped with a reflux condenser to prevent water evaporation. Under these process conditions, the product has good dispersibility and moderate viscosity, and no agglomeration or coking is observed. After subsequent washing and dehydration, high-purity lanolin magnesium soap can be obtained.

[0036] Step 3: Purification and Washing Stage After the displacement reaction is completed, the material is transferred to a washing container equipped with a heating jacket and a static stratification function. The material is then washed in multiple stages with deionized water at a constant temperature of 75±5℃ to thoroughly remove sodium sulfate and other water-soluble byproducts generated during the reaction.

[0037] Add 70–90 kg of deionized water (preferably about 80 kg) for each wash, keeping the total water consumption within the range of 350–450 kg. Use countercurrent or stepwise dilution methods to improve washing efficiency. After each water addition, stir at 80–100 r / min for 10 minutes to ensure full contact between the oil and water phases. Then stop stirring and allow the water to stand for at least 20 minutes to ensure complete separation of the oil and water phases. Then open the bottom drain valve to completely drain the lower wastewater to prevent residual water phase from being carried into subsequent batches. Repeat the above washing process at least 5 times. Take the last batch of discharged washing water each time to test its pH value and conductivity until the pH value of the final discharged water is stable between 6.5 and 7.5 and the conductivity is ≤10 μS / cm, indicating that electrolyte impurities such as sodium salts have been basically removed and the washing has reached its end point.

[0038] The entire washing process maintains a uniform temperature to prevent the material viscosity from increasing due to cooling, which would affect the stratification effect. The washed lanolin magnesium soap product is translucent, without obvious turbidity or suspended matter, and no sulfate ions were detected in the aqueous phase (tested according to HG / T2345 method), indicating that the by-products were thoroughly removed.

[0039] Step 4: Compounding and Dehydration Stage Add 60 kg of barium alkylbenzene sulfonate and 20 kg of 75SN neutral oil (refined mineral base oil with a kinematic viscosity of 100–120 mmHg at 40°C) to the lanolin magnesium soap material that has passed the washing in step three. 2 The mixture is transferred to an atmospheric pressure stirred tank for compounding. An anchor-type stirrer is used to ensure sufficient shearing and mixing in the high-viscosity system. The stirring rate is controlled in the range of 100-200 r / min, preferably 150 r / min, and the stirring time is not less than 30 minutes. This allows the lanolin magnesium soap, barium heavy alkylbenzene sulfonate and 75SN neutral oil to be uniformly dispersed at the microscale, forming a stable, uniform oil phase system without stratification or precipitation.

[0040] After compounding, the mixture is heated to 100±2℃ and transferred to a vacuum drying system for dehydration. During the dehydration process, the vacuum degree is maintained between 0.08 and 0.095 MPa, and the dehydration time is controlled at 2 hours ± 10 minutes. The mixture is continuously stirred at a low speed of 50–100 r / min to promote the escape of internal moisture and prevent the material surface from forming a film or local overheating.

[0041] After dehydration, stop heating and allow it to cool naturally to room temperature (25±5℃) to obtain a brownish-yellow, semi-transparent paste with good fluidity, no moisture, and no bubbles. Immediately after discharge, seal and package the product. The resulting product should be stored in a dark, dry, and well-ventilated environment to prevent moisture absorption or oxidation and deterioration.

[0042] The amount of raw materials used in the above steps can be adjusted within the following range according to the production scale: 40-50 kg of lanolin, 15-25 kg of saponification water, 30% sodium hydroxide aqueous solution added according to the stoichiometric ratio based on the total acid value of lanolin to ensure complete saponification of fatty acids, 20-28 kg of magnesium sulfate, 60-80 kg of water for preparing magnesium sulfate solution, 350-450 kg of total deionized water for washing, 55-65 kg of barium heavy alkylbenzene sulfonate, and 18-22 kg of 75SN neutral oil. The above adjustment range has been experimentally verified to obtain products with stable performance.

[0043] The physicochemical and rust-preventive properties of the obtained high-flowability lanolin magnesium soap compound oil were tested. The test methods and results are as follows: Dynamic viscosity at 25℃: Measured using GB / T265 method, the result was 860 mPa·s, which is significantly lower than the 2000–3000 mPa·s of traditional lanolin magnesium soap products, indicating a significant improvement in fluidity; Copper strip corrosion test (100℃, 3h): Performed according to GB / T5096, copper strip rating is 1a, no corrosion, no discoloration; Damp heat test (50±2℃, RH≥95%, 14 days): Performed according to GB / T2361, the surface of the test piece should be free of rust and blistering; Moisture content: determined according to GB / T260, the result is 0.18%, which meets the requirement of ≤0.2%; Water-soluble acids and bases: determined according to GB / T259-88, the result was neutral; Sulfate: Not detected according to HG / T2345 method; Storage stability: Sealed samples placed in a 50℃ constant temperature oven for 30 days showed no stratification, no precipitation, and viscosity change rate <5%.

[0044] The above test results show that the product of the present invention has excellent flowability, rust prevention and storage stability, and meets the requirements of industrial applications.

[0045] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-flowability lanolin magnesium soap compound oil, characterized in that, It consists of the following components in parts by weight: Lanolin magnesium soap: 2.5-3.5 parts; Barium heavy alkylbenzene sulfonate: 5.0-7.0 parts; 75SN neutral oil: 1.5-2.5 parts; The lanolin magnesium soap is a magnesium fatty acid product obtained by saponifying natural lanolin to produce sodium fatty acid, followed by a substitution reaction with magnesium ions. The barium heavy alkylbenzene sulfonate is an aromatic barium sulfonate salt with long-chain alkyl substituents having fourteen to twenty carbon atoms. The 75SN neutral oil is a refined mineral base oil with a kinematic viscosity of 100–120 mmHg at 40°C. 2 / s serves as the dispersion medium for the system.

2. The high-flowability lanolin magnesium soap compound oil according to claim 1, characterized in that: The weight ratios of the components are as follows: Lanolin magnesium soap: barium heavy alkylbenzene sulfonate: 75SN neutral oil = 3:6:

2.

3. The high-flowability lanolin magnesium soap compound oil according to claim 1, characterized in that: The lanolin magnesium soap is a product prepared by a method including the following steps: Lanolin is mixed with water and an aqueous sodium hydroxide solution and refluxed at 90–95°C for 4 hours to produce sodium fatty acid. Then, magnesium sulfate solution is added and an ion exchange reaction is carried out at 60–75°C to convert it into magnesium fatty acid. The sodium salt impurities are then removed by high-temperature water washing, and pure lanolin magnesium soap product is obtained by vacuum dehydration.

4. A method for producing a high-flowability lanolin magnesium soap compound oil, comprising the high-flowability lanolin magnesium soap compound oil according to any one of claims 1-3, characterized in that, Includes the following steps: Step 1, Saponification Reaction Stage: Weigh 45kg of lanolin, 20kg of water, and 30% sodium hydroxide aqueous solution added according to stoichiometry, and put them into a reaction vessel equipped with a stirrer and a reflux condenser. After stirring evenly, heat to 90–95℃ and react under reflux for 4 hours to completely convert the free fatty acids in the lanolin into sodium fatty acids. After the reaction is completed, add 300kg of water to dilute and obtain a saponified liquid with good fluidity. Step 2, Displacement reaction stage: Dissolve 24 kg of magnesium sulfate in 72 kg of water and stir until completely dissolved to form a clear solution. Slowly add the clear solution dropwise to the saponification solution obtained in Step 1. Stir at 150 r / min at 60℃ for 15 minutes to fully mix the reaction system. Then raise the temperature to 72℃ and keep the reaction for 30 minutes to complete the ion exchange process from sodium fatty acid to magnesium fatty acid. Step 3, Purification and Washing Stage: Transfer the material after the displacement reaction to a washing container and wash it five times with deionized water at 75°C, using about 80 kg of water each time. After each wash, allow it to stand and separate into layers and completely drain the aqueous phase until the last wash water is neutral and has a conductivity of less than 10 μS / cm, so that water-soluble byproducts such as sodium sulfate are effectively removed. Step 4, Compounding and Dehydration Stage: Add 60 kg of barium heavy alkylbenzene sulfonate and 20 kg of 75SN neutral oil to the washed lanolin magnesium soap material. Stir in an atmospheric pressure stirred tank at a speed of 100–200 r / min for 30 minutes to fully disperse and mix the components. Then heat the mixture to 100℃ and dehydrate it for 2 hours under a vacuum of not less than 0.08 MPa. After cooling, the target product is obtained.

5. The method for producing a high-flowability lanolin magnesium soap compound oil according to claim 4, characterized in that: The amount of each raw material can be adjusted within the following ranges: Lanolin: 40–50 kg; Water used for saponification: 15–25 kg; 30% sodium hydroxide aqueous solution: The amount to be added is determined by stoichiometry based on the total acid value in lanolin to ensure complete saponification of fatty acids; Magnesium sulfate: 20–28 kg; Water used for preparing magnesium sulfate solution: 60–80 kg; Deionized water: 350–450 kg; Barium heavy alkylbenzene sulfonate: 55–65 kg; 75SN neutral oil: 18–22 kg.

6. The method for producing a high-flowability lanolin magnesium soap compound oil according to claim 4, characterized in that: In step one, the saponification reaction is carried out in the temperature range of 90–95℃, preferably 92±2℃, and the reaction time is 4 hours ± 10 minutes. The reaction must be kept under reflux. The concentration of sodium hydroxide aqueous solution is 25–35%, preferably 30%, and it is added slowly dropwise to avoid local over-alkaliness that could lead to side reactions.

7. The method for producing a high-flowability lanolin magnesium soap compound oil according to claim 4, characterized in that: In step two, the magnesium sulfate solution is added at a rate controlled within 10–15 minutes. During the addition, the stirring rate is maintained at 150±10 r / min, the initial reaction temperature is 60±2℃, and after the addition is complete, the temperature is raised to 72±3℃ and kept at that temperature for 30±5 minutes to ensure that the ion replacement reaction proceeds fully. The reaction endpoint is determined by detecting that the sodium ion concentration in the aqueous phase no longer changes.

8. The method for producing a high-flowability lanolin magnesium soap compound oil according to claim 4, characterized in that: In step three, the washing operation adopts a counter-current method, using 70–90 kg of deionized water each time, maintaining the water temperature at 75±5℃, and allowing the water to stand for at least 20 minutes after each wash to ensure thorough water separation. The washing is performed at least 5 times, and the final washing water has a pH value of 6.5–7.5 and a conductivity of ≤10μS / cm.

9. The method for producing a high-flowability lanolin magnesium soap compound oil according to claim 4, characterized in that: The compounding stage in step four is carried out under normal pressure. An anchor stirrer is used as the stirring equipment, and the stirring rate is controlled within the range of 100-200 r / min. The stirring time is not less than 30 minutes, so that the lanolin magnesium soap, barium heavy alkylbenzene sulfonate and 75SN neutral oil can be uniformly dispersed at the microscale to form a stable homogeneous system.

10. The method for producing a high-flowability lanolin magnesium soap compound oil according to claim 9, characterized in that: In step four, the dehydration process is carried out in a vacuum drying system. The heating temperature is 100±2℃, the vacuum degree is controlled between 0.08 and 0.095 MPa, and the dehydration time is 2 hours ± 10 minutes. During the dehydration process, the mixture is continuously stirred to promote the release of moisture. After the dehydration is completed, the mixture is naturally cooled to room temperature, discharged, packaged, and the resulting product is sealed and stored in a light-proof and dry environment.

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