Engine energy repair liquid and preparation method thereof

Abstract

The present application relates to the field of fuel additive, provide a kind of engine energy repair liquid and its preparation method, with 100wt% engine energy repair liquid includes the following raw materials: composite polyether amine 37-47%, gasoline additive composite agent 53-60%, antioxidant 0.5-2%;Wherein, according to weight parts, the gasoline additive composite agent includes the following raw materials: polyisobutylene amine 44-47 parts, lubricant 14-17 parts, dispersant 0.4-0.6 parts, extreme pressure wear-resistant agent 0.01-0.04 parts, solvent 33-38 parts.The engine energy repair liquid provided by the present application has the advantages of high efficiency in removing carbon deposits at the fuel injection nozzle and intake valve, improving gasoline combustion efficiency and saving fuel.

Description

Technical Field

[0001] This invention relates to the field of fuel additives, and in particular to an engine energy restoration fluid and its preparation method. Background Technology

[0002] With the continuous growth of car ownership, the market demand for engine maintenance products is growing stronger. Engine energy repair fluid is a fuel additive that is mainly used to improve the combustion efficiency of gasoline or diesel and to clean carbon deposits inside the engine. It is suitable for all types of gasoline and diesel vehicles.

[0003] When a car engine is running, the fuel injector temperature is around 100℃, and the intake valve temperature is between 200-300℃. At these temperatures, unstable components in fuel, especially gasoline, are prone to oxidation and condensation reactions, producing gum and carbon deposits that accumulate on the fuel injectors, intake valves, piston tops, and combustion chamber walls. Increased carbon deposits in the combustion chamber of a fuel engine increase its compression ratio and hinder heat dissipation, potentially leading to increased fuel consumption. However, most current engine maintenance products offer only one function and cannot simultaneously achieve effective carbon removal and fuel savings. Furthermore, the surfactants or dispersants added to these products often struggle to achieve a balance between dispersion, penetration, and environmental performance.

[0004] Patent CN 106635204 B discloses a fuel additive, its preparation method, and its usage method. The fuel additive, based on 100 wt.% of its total weight, contains: 70-90 wt.% nonylphenol polyetheramine, 10-30 wt.% polyamine polyisobutyleneamine, and 0-20 wt.% auxiliary additives. This fuel additive has the advantage of simultaneously and efficiently removing carbon deposits from the intake valve and combustion chamber of a fuel engine. However, it does not address fuel-saving performance and still has certain limitations in application.

[0005] Therefore, there is an urgent need in the market for an engine energy repair fluid that can effectively remove carbon deposits from fuel injectors and intake valves, improve gasoline combustion efficiency, and save fuel. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention synthesizes an engine energy repair fluid using composite polyetheramine, gasoline additive composite, and antioxidant. The gasoline additive composite is mainly composed of polyisobutyleneamine, and a dispersant is added to it. This results in good environmental performance and enables the engine energy repair fluid to effectively remove carbon deposits from fuel injectors and intake valves, thereby improving gasoline combustion efficiency and saving fuel.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides an engine energy repair fluid, which, at 100 wt%, comprises the following raw materials: 37-47% composite polyetheramine, 53-60% gasoline additive composite, and 0.5-2% antioxidant.

[0008] In some embodiments of the present invention, the composite polyetheramine is a mixture of polyetheramine 1000 and polyetheramine 2000 in a mass ratio of 1:(0.7-0.8).

[0009] The applicant selected two polyetheramines with different molecular weights for combined use, which have both excellent penetration and adsorption capabilities, thereby effectively removing and preventing carbon deposits.

[0010] In some embodiments of the present invention, the antioxidant is BHT.

[0011] In some embodiments of the present invention, the gasoline additive compound comprises, by weight, the following raw materials: 44-47 parts of polyisobutylene amine, 14-17 parts of lubricant, 0.4-0.6 parts of dispersant, 0.01-0.04 parts of extreme pressure wear-resistant agent, and 33-38 parts of solvent.

[0012] In some embodiments of the present invention, the number-average molecular weight of the polyisobutyleneamine is 1000-1300.

[0013] In some embodiments of the present invention, the lubricant is polyethylene glycol.

[0014] Preferably, the lubricant is PPG-2000 or PPG-3000.

[0015] In some embodiments of the present invention, the method for preparing the dispersant includes the following steps: The alkyl glycoside was dried and mixed with isopropanol. The mixture was stirred at 60-70℃ until completely dissolved. After adjusting the pH to 9-11, 1-chlorododecane was added dropwise, followed by deionized water and a phase transfer catalyst. The mixture was stirred and reacted at 60-70℃ and pH 9-11 for 7.5-8 hours. After cooling to room temperature, the mixture was rotary evaporated and extracted to obtain the organic phase. The organic phase was washed, dried, filtered, and then distilled under reduced pressure and rotary evaporated to obtain the dispersant.

[0016] In some embodiments of the present invention, the carbon chain length of the alkyl glycoside is C10-12.

[0017] Preferably, the alkyl glycoside has a carbon chain length of C12.

[0018] In some embodiments of the present invention, the mass ratio of the alkyl glycoside to 1-chlorododecane is 1:(0.6-0.8).

[0019] Preferably, the mass ratio of the alkyl glycoside to 1-chlorododecane is 1:0.7.

[0020] Adding a certain amount of surfactant or dispersant to engine energy repair fluid can enhance the dispersibility and penetration of cleaning components, thereby improving cleaning efficiency. Nonylphenol polyoxyethylene ether is a commonly used dispersant, but it has certain biological toxicity and environmental pollution.

[0021] The applicant synthesized a dispersant using natural and environmentally friendly alkyl glycosides with specific carbon chain lengths of C10-C12 as raw materials and introducing 1-chlorododecane, controlling the ratio between the two. 1-Chlorododecane modifies the primary hydroxyl groups on the alkyl glycoside ring, introducing dodecyl ether groups to form longer hydrophobic segments, thus improving the hydrophobicity of the alkyl glycoside. Its long alkyl chain forms a stronger hydrophobic interaction with polyisobutyleneamine, which can more firmly adsorb onto the hydrophobic carbon deposit surface, forming a stable dispersion system. Furthermore, the dispersant can enhance the adsorption and penetration ability of polyetheramine on the carbon deposit surface, making it easier for polyetheramine to contact the interior of the carbon deposit, thereby synergistically improving the removal of carbon deposits. In addition, the long alkyl chain of the dispersant has good compatibility with the fatty acid chain of sulfurized olefin cottonseed oil, which can enhance the dispersibility of sulfurized olefin cottonseed oil in engine energy repair fluid, making it more evenly distributed on the engine metal surface, thereby playing a better role in wear resistance and lubrication, and thus synergistically inhibiting carbon deposit deposition.

[0022] In some embodiments of the present invention, the extreme pressure wear-resistant agent is sulfurized olefin cottonseed oil.

[0023] The applicant chose sulfurized olefin cottonseed oil as an extreme pressure wear-resistant agent. Compared with traditional wear-resistant agents such as chlorinated paraffin, it is more natural and environmentally friendly and has better lubrication performance. In addition, it can play a synergistic role in cleaning and protection with polyetheramine and polyisobutyleneamine.

[0024] In some embodiments of the present invention, the solvent is a mixture of mixed trimethylbenzene and mixed tetramethylbenzene.

[0025] Preferably, the solvent is a mixture of mixed trimethylbenzene and mixed tetramethylbenzene in a mass ratio of 1:(6.5-8.5).

[0026] More preferably, the solvent is a mixture of mixed trimethylbenzene and mixed tetramethylbenzene in a mass ratio of 1:8.

[0027] In another aspect, the present invention provides a method for preparing the engine energy repair fluid described in the above technical solution, comprising the following steps: S1. Under conditions of 40-50℃, polyisobutylene amine, lubricant, dispersant and extreme pressure wear-resistant agent are added to the solvent in sequence while stirring. After stirring, the mixture is cooled to room temperature to obtain a gasoline additive compound for later use. S2. Mix the composite polyetheramine and the gasoline additive composite from step S1, heat to 30-40℃, stir, add antioxidant, stir, cool to room temperature, and filter to obtain engine energy repair fluid.

[0028] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention synthesizes an engine energy repair fluid by using composite polyetheramine, gasoline additive composite and antioxidant. The gasoline additive composite is mainly composed of polyisobutyleneamine and a dispersant is designed to be added. Through the synergistic effect between the components, it has good environmental protection and the engine energy repair fluid has the advantages of efficiently removing carbon deposits from the fuel injector and intake valve, improving gasoline combustion efficiency and saving fuel.

[0029] (2) This invention uses natural and environmentally friendly alkyl glycosides with specific carbon chain lengths of C10-C12 as raw materials and introduces 1-chlorododecane. By controlling the ratio between the two, a dispersant is synthesized. 1-chlorododecane modifies the primary hydroxyl groups on the alkyl glycoside ring and introduces dodecyl ether groups to form longer hydrophobic segments, thereby improving the hydrophobicity of the alkyl glycoside. Its long alkyl chain forms a stronger hydrophobic effect with polyisobutyleneamine, which can be more firmly adsorbed on the hydrophobic carbon deposit surface to form a stable dispersion system. Furthermore, the dispersant can enhance the adsorption and penetration ability of polyetheramine on the carbon deposit surface, making it easier for polyetheramine to contact the interior of the carbon deposit, thereby synergistically improving the removal effect of carbon deposit. Detailed Implementation

[0030] The present invention will be described below with reference to specific embodiments. It should be noted that the following embodiments are examples of the present invention and are used only to illustrate the invention, not to limit it. Other combinations and various modifications within the scope of the present invention can be made without departing from its spirit or scope.

[0031] In the following examples and comparative examples, except for the dispersant, all other compound monomers and related reagents used were commercially available. Among them, the polyetheramine 1000 was model FL-1000; the polyetheramine 2000 was model FL-2000; the polyisobutyleneamine had a number average molecular weight of 1000; the polyethylene glycol was model PPG-2000; the alkyl glycoside had a carbon chain length of C12; the sulfurized olefin cottonseed oil was model T405; the mixed trimethylbenzene was 100# aromatic solvent oil; and the mixed tetramethylbenzene was 150# aromatic solvent oil.

[0032] Preparation Example 1 The method for synthesizing dispersant A includes the following steps: 35g of dried alkyl glycoside was mixed with 300ml of isopropanol and stirred at 65℃ until completely dissolved. After adjusting the pH to 10 by adding 10wt% sodium hydroxide aqueous solution, 25g of 1-chlorododecane was added dropwise, followed by 50ml of deionized water and 0.5g of tetrabutylammonium bromide. The mixture was stirred at 65℃ for 8 hours (the pH was controlled to 10 by adding 10wt% sodium hydroxide aqueous solution during the reaction). After cooling to room temperature, the mixture was rotary evaporated and extracted with n-hexane to obtain the organic phase. The organic phase was washed with saturated brine, dried over anhydrous sodium sulfate, filtered, and 1-chlorododecane was removed by vacuum distillation. The n-hexane was then removed by rotary evaporation to obtain dispersant A.

[0033] Preparation Example 2 Dispersant B is implemented in the same way as dispersant A, except that the mass of 1-chlorododecane is replaced with 18g.

[0034] Preparation Example 3 Dispersant C is implemented in the same way as dispersant A, except that the mass of 1-chlorododecane is replaced with 31g.

[0035] Preparation Example 4 Dispersant D is implemented in the same way as dispersant A, except that the carbon chain length of the alkyl glycoside is replaced with C8.

[0036] Example 1 An engine energy repair fluid, in 100wt%, comprises the following raw materials: 42% composite polyetheramine, 57% gasoline additive compound, and 1% antioxidant BHT.

[0037] The composite polyetheramine is a mixture of polyetheramine FL-1000 and polyetheramine FL-2000 in a mass ratio of 1:0.75.

[0038] By weight, the gasoline additive compound comprises the following raw materials: 45.5 parts polyisobutylene amine, 16 parts PPG-2000, 0.5 parts dispersant A, 0.03 parts sulfurized olefin cottonseed oil T405, and 36 parts solvent.

[0039] The solvent is a mixture of 100# aromatic solvent oil and 150# aromatic solvent oil in a mass ratio of 1:8.

[0040] The preparation method of the engine energy repair fluid in this embodiment includes the following steps: S1. At 45℃, while stirring, add polyisobutyleneamine, PPG-2000, dispersant A and sulfurized olefin cottonseed oil T405 to the solvent in sequence, stir for 1.5h, cool to room temperature, and obtain gasoline additive compound for later use. S2. Mix the composite polyetheramine and the gasoline additive composite from step S1, heat to 35°C, stir for 30 minutes, add antioxidant BHT, stir for 20 minutes, cool to room temperature, and filter through a 5μm filter to obtain engine energy repair fluid.

[0041] Example 2 An engine energy repair fluid, in 100wt%, comprises the following raw materials: 40% composite polyetheramine, 59.5% gasoline additive compound, and 0.5% antioxidant BHT.

[0042] The composite polyetheramine is a mixture of polyetheramine FL-1000 and polyetheramine FL-2000 in a mass ratio of 1:0.7.

[0043] By weight, the gasoline additive compound comprises the following raw materials: 44 parts polyisobutylene amine, 14 parts PPG-2000, 0.4 parts dispersant A, 0.01 parts sulfurized olefin cottonseed oil T405, and 33 parts solvent.

[0044] The solvent is a mixture of 100# aromatic solvent oil and 150# aromatic solvent oil in a mass ratio of 1:6.5.

[0045] The preparation method of the engine energy repair fluid in this embodiment includes the following steps: S1. Under 40℃ conditions, polyisobutyleneamine, PPG-2000, dispersant A and sulfurized olefin cottonseed oil T405 are added to the solvent in sequence while stirring. Stir for 2 hours, cool to room temperature, and obtain gasoline additive compound for later use. S2. Mix the composite polyetheramine and the gasoline additive composite from step S1, heat to 30°C, stir for 40 minutes, add antioxidant BHT, stir for 30 minutes, cool to room temperature, and filter through a 5μm filter to obtain engine energy repair fluid.

[0046] Example 3 An engine energy repair fluid, in 100wt%, comprises the following raw materials: 45% composite polyetheramine, 53% gasoline additive compound, and 2% antioxidant BHT.

[0047] The composite polyetheramine is a mixture of polyetheramine FL-1000 and polyetheramine FL-2000 in a mass ratio of 1:0.8.

[0048] By weight, the gasoline additive compound comprises the following raw materials: 47 parts polyisobutylene amine, 17 parts PPG-2000, 0.6 parts dispersant A, 0.04 parts sulfurized olefin cottonseed oil T405, and 38 parts solvent.

[0049] The solvent is a mixture of 100# aromatic solvent oil and 150# aromatic solvent oil in a mass ratio of 1:8.5.

[0050] The preparation method of the engine energy repair fluid in this embodiment includes the following steps: S1. At 50℃, while stirring, add polyisobutyleneamine, PPG-2000, dispersant A and sulfurized olefin cottonseed oil T405 to the solvent in sequence, stir for 1.5h, cool to room temperature, and obtain gasoline additive compound for later use. S2. Mix the composite polyetheramine and the gasoline additive composite from step S1, heat to 40°C, stir for 25 minutes, add antioxidant BHT, stir for 20 minutes, cool to room temperature, and filter through a 5μm filter to obtain engine energy repair fluid.

[0051] Example 4 This embodiment provides an engine energy repair fluid and its preparation method. The specific implementation method is the same as that in Embodiment 1, except that dispersant B replaces dispersant A in an equal amount.

[0052] Example 5 This embodiment provides an engine energy repair fluid and its preparation method. The specific implementation method is the same as that in Embodiment 1, except that dispersant C replaces dispersant A in an equal amount.

[0053] Example 6 This embodiment provides an engine energy repair fluid and its preparation method. The specific implementation method is the same as that in Embodiment 1, except that dispersant D replaces dispersant A in an equal amount.

[0054] Example 7 This embodiment provides an engine energy repair fluid and its preparation method. The specific implementation method is the same as that in Embodiment 1, except that alkyl glycosides are used to replace dispersant A in equal amounts.

[0055] Example 8 This embodiment provides an engine energy repair fluid and its preparation method. The specific implementation method is the same as that in Embodiment 1, except that nonylphenol polyoxyethylene ether is used to replace dispersant A in equal amounts.

[0056] Example 9 This embodiment provides an engine energy repair fluid and its preparation method. The specific implementation method is the same as that in Embodiment 1, except that chlorinated paraffin replaces sulfurized olefin cottonseed oil T405 in an equal amount.

[0057] The chlorinated paraffin is designated as No. 42 chlorinated paraffin.

[0058] Comparative Example 1 This comparative example provides an engine energy repair fluid and its preparation method. The specific implementation method is the same as that in Example 1, except that polyetheramine FL-1000 is used to replace the composite polyetheramine in equal amounts.

[0059] Comparative Example 2 This comparative example provides an engine energy repair fluid and its preparation method. The specific implementation method is the same as that in Example 1, except that polyetheramine FL-2000 is used to replace the composite polyetheramine in equal amounts.

[0060] Performance testing The relevant performance of the engine energy repair fluids of Examples 1-9 and Comparative Examples 1-2 were tested, and the test results are shown in Tables 1 and 2.

[0061] (1) SDT dot dispersion test 5g of engine sludge, 100g of 500N base oil, and 150mg of engine energy repair fluid from Examples 1-9 and Comparative Examples 1-2 were stirred together at 150°C for 1 hour. Then, while still hot, a small amount of the mixture was transferred to a 9cm diameter qualitative filter paper using a 2ml pipette. After diffusion at room temperature (25°C) for 24 hours, the ratio of the sludge diffusion ring diameter to the oil diffusion ring diameter was measured, i.e., the SDT value. The larger the SDT value, the better the dispersion performance of the engine energy repair fluid. The test results are shown in Table 1. (2) Simulation test of carbon deposits on intake valve An inclined aluminum plate was heated and kept at a constant temperature of 330±10℃ using the heating plate of a crankcase simulation tester. 200g of gasoline containing 300mg of engine energy repair fluid from Examples 1-9 and Comparative Examples 1-2 was placed in a glass container with a flow meter at the bottom and continuously dripped onto the surface of the aluminum plate at a flow rate of 5mg / min. The ability of the gasoline detergent to inhibit carbon deposit formation was qualitatively evaluated by measuring the amount of carbon deposits on the aluminum plate. This method can effectively simulate the tendency of carbon deposits to form at the intake valve. The test results are shown in Table 1. (3) Fuel-saving effect test To ensure the generalizability of the driving test results, two vehicle models that frequently travel on the same road sections were used in the tests, and the engine energy restoration fluid of Examples 1-3 of this invention was used multiple times. Test vehicle: Audi A6 1.8T, 8 years old, frequently used for travel between Beijing and Tangshan; Hyundai Elantra 1.6L, 3 years old, frequently used for travel between Beijing and Tianjin; Data recording: Audi A6 1.8T with a full fuel tank of 70L and Hyundai Elantra with a full fuel tank of 52L. Neither car has a fuel consumption meter. The fuel tank was filled before each trip and filled again upon return. The amount of fuel added is the number of liters of fuel consumed for this round trip. The mixture was mixed at a ratio of 1:800. Each car was tested 4 times. Fuel saving rate (%) = (base average fuel consumption - fuel consumption per trip after use) / base average fuel consumption × 100%. Base average fuel consumption is the average fuel consumption before using the engine energy restoration fluid of this invention. Refer to GB / T 14951-2023. The test results are shown in Table 2.

[0062] Table 1

[0063] Table 2

[0064] As shown in Tables 1 and 2, the engine energy repair fluids in Examples 1-3 of this invention have the advantages of high dispersion, efficient carbon deposit removal, and fuel saving. However, Examples 4-5 altered the modification ratio of 1-chlorododecane to alkyl glycosides during dispersant preparation, leading to insufficient or excessive substitution of reactive hydroxyl groups in the alkyl glycosides. Insufficient substitution results in an insufficient number of hydrophobic groups in the dispersant, thus weakening the binding ability of the dispersant to carbon deposit particles. Excessive substitution leads to the inability to form a stable dispersion system or increases side reactions, preventing the dispersant from effectively encapsulating carbon deposit particles. Both of these factors result in poor dispersibility and carbon deposit removal efficiency of the engine energy repair fluid. Example 6 altered the carbon chain length of the alkyl glycoside, leading to poor dispersion stability and consequently reducing the dispersibility and carbon deposit removal efficiency of the engine energy repair fluid. Example 7 involved an equal amount of alkyl glycoside replacing dispersant A, but its hydrophobicity was not improved. The improvements resulted in poorer dispersibility and carbon deposit removal of the engine energy repair fluid. Example 8 used nonylphenol polyoxyethylene ether to replace dispersant A in equal amounts, which was not environmentally friendly and its dispersibility was not as good as that of dispersant A in this application. Example 9 used chlorinated paraffin to replace sulfurized olefin cottonseed oil T405 in equal amounts, which caused the synergistic cleaning effect between sulfurized olefin cottonseed oil T405 and polyetheramine and polyisobutyleneamine to disappear, thus reducing the dispersibility and carbon deposit removal effect of the engine energy repair fluid to a certain extent. Comparative Examples 1 and 2 used polyetheramine FL-1000 or polyetheramine FL-2000 to replace composite polyetheramine in equal amounts, respectively. The effect of the combination of large and small molecule polyetheramines in removing carbon deposits disappeared, and the test showed that the carbon deposit removal effect of the engine energy repair fluid was significantly worse.

[0065] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An engine energy restoration fluid, characterized in that, The engine energy repair fluid comprises the following raw materials at 100 wt%: 37-47% composite polyetheramine, 53-60% gasoline additive compound, and 0.5-2% antioxidant.

2. The engine energy restoration fluid according to claim 1, characterized in that, The composite polyetheramine is a mixture of polyetheramine 1000 and polyetheramine 2000 in a mass ratio of 1:(0.7-0.8).

3. The engine energy restoration fluid according to claim 1, characterized in that, By weight, the gasoline additive compound comprises the following raw materials: 44-47 parts of polyisobutylene amine, 14-17 parts of lubricant, 0.4-0.6 parts of dispersant, 0.01-0.04 parts of extreme pressure wear-resistant agent, and 33-38 parts of solvent.

4. The engine energy restoration fluid according to claim 3, characterized in that, The lubricant is polyethylene glycol.

5. The engine energy restoration fluid according to claim 3, characterized in that, The method for preparing the dispersant includes the following steps: The alkyl glycoside was dried and mixed with isopropanol. The mixture was stirred at 60-70℃ until completely dissolved. After adjusting the pH to 9-11, 1-chlorododecane was added dropwise, followed by deionized water and a phase transfer catalyst. The mixture was stirred and reacted at 60-70℃ and pH 9-11 for 7.5-8 hours. After cooling to room temperature, the mixture was rotary evaporated and extracted to obtain the organic phase. The organic phase was washed, dried, filtered, and then distilled under reduced pressure and rotary evaporated to obtain the dispersant.

6. The engine energy restoration fluid according to claim 5, characterized in that, The alkyl glycoside has a carbon chain length of C10-12.

7. The engine energy restoration fluid according to claim 5, characterized in that, The mass ratio of the alkyl glycoside to 1-chlorododecane is 1:(0.6-0.8).

8. The engine energy restoration fluid according to claim 3, characterized in that, The extreme pressure wear-resistant agent is sulfurized olefin cottonseed oil.

9. The engine energy restoration fluid according to claim 3, characterized in that, The solvent is a mixture of mixed trimethylbenzene and mixed tetramethylbenzene.

10. A method for preparing an engine energy repair fluid according to any one of claims 3-9, characterized in that, Includes the following steps: S1. Under conditions of 40-50℃, polyisobutylene amine, lubricant, dispersant and extreme pressure wear-resistant agent are added to the solvent in sequence while stirring. After stirring, the mixture is cooled to room temperature to obtain a gasoline additive compound for later use. S2. Mix the composite polyetheramine and the gasoline additive composite from step S1, heat to 30-40℃, stir, add antioxidant, stir, cool to room temperature, and filter to obtain engine energy repair fluid.

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