High-efficiency automobile oil nozzle cleaning agent

Abstract

The invention relates to the technical field of fuel additives, in particular to a high-efficiency automobile fuel spray nozzle cleaning agent. The lubricating oil is prepared from the following raw materials in parts by weight: 20-30 parts of a carbon deposit clearing agent, 4-6 parts of an anti-friction agent, 1.5-2.5 parts of an antioxidant, 2-3 parts of an antiknock agent and 45-70 parts of solvent oil, the carbon deposit clearing agent is prepared from 4, 4 '-biphenol grafted polyisobutene and branched amine. The high-efficiency automobile fuel spray nozzle cleaning agent prepared by the invention has excellent automobile fuel spray nozzle cleaning capability and efficiency, and has good detergency and dispersibility on sediments.

Description

Technical Field

[0001] The invention relates to the technical field of fuel additives, in particular to a highly efficient automobile fuel injection nozzle cleaning agent. Background Art

[0002] The fuel injector plays a vital role in the proper functioning of a car engine. It is responsible for atomizing and spraying the fuel into the combustion chamber to ensure complete and efficient combustion. However, over time, the fuel injector may suffer from dirt, deposits and carbon deposits, resulting in poor fuel injection, which in turn affects the engine's performance and fuel consumption.

[0003] Existing fuel oil cleaning agents often have the following shortcomings in cleaning fuel injectors: (1) Poor cleaning effect: The formulas of many traditional cleaning agents do not target the carbon deposit and sediment characteristics of fuel injectors, resulting in poor cleaning effect; (2) Corrosive problems: The chemical components in some cleaning agents may cause corrosion to the materials of the fuel injectors and fuel systems, increasing maintenance costs and risks; (3) Generation of by-products: When some cleaning agents are used under high temperature or high pressure conditions, they may produce new pollutants and increase the carbon deposit problem in the combustion chamber. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a highly efficient automobile fuel injection nozzle cleaning agent to solve the problem that the existing fuel oil cleaning agent has a poor cleaning effect on the fuel injection nozzle and easily causes carbon deposition in the combustion chamber.

[0005] Based on the above purpose, the present invention provides a highly efficient automobile fuel injection nozzle cleaning agent, which is prepared from the following raw materials by weight: 20-30 parts of carbon deposit detergent, 4-6 parts of friction reducer, 1.5-2.5 parts of antioxidant, 2-3 parts of antiknock agent and 45-70 parts of solvent oil;

[0006] Furthermore, the preparation method of the carbon deposit cleaning agent is as follows:

[0007] (1) adding polyisobutylene, 4,4'-biphenyldiphenol and a catalyst into solvent oil D60, heating to 80-85° C., stirring and reacting for 5-6 hours, then adding a 40 wt% formaldehyde aqueous solution and ethylenediamine, heating to 100-105° C., stirring and reacting for 6-7 hours, washing with water, and rotary evaporation to obtain an amino monomer A;

[0008] (2) Add ethylenediamine to methanol, cool to 0°C, and add methyl acrylate dropwise. After the addition is complete, stir and react for 3-4 hours, and then evaporate to obtain amino monomer B;

[0009] (3) adding amino monomer A to amino monomer B, heating to 140-150° C. under reduced pressure and vacuum conditions, reacting for 3-5 hours to obtain a carbon deposit cleaning agent;

[0010] Preferably, in step (1), the molar ratio of polyisobutylene, 4,4'-biphenol and ethylenediamine is 1:1:1.

[0011] Preferably, the amount of the formaldehyde aqueous solution added in step (1) is 110%-120% of the total weight of ethylenediamine.

[0012] Preferably, the catalyst in step (1) is boron trifluoride etherate.

[0013] Preferably, the amount of catalyst added in step (1) is 1% by weight of the polyisobutylene.

[0014] Preferably, the weight average molecular weight of the polyisobutylene in step (1) is 1200-1500.

[0015] Preferably, the amount of solvent oil D60 added in step (1) is 150%-200% of the weight of polyisobutylene.

[0016] Preferably, in step (2), the molar ratio of ethylenediamine to methyl acrylate is 1:1.05.

[0017] Preferably, the amount of methanol added in step (2) is 100%-200% of the total weight of ethylenediamine and methyl acrylate.

[0018] Preferably, in step (3), the weight ratio of the amino monomer A to the amino monomer B is 10:15-22.

[0019] Preferably, the antioxidant is a mixture of 2,6-di-tert-butyl-p-cresol and tris(2,4-di-tert-butylphenyl)phosphite.

[0020] Preferably, the antiknock agent is an ether antiknock agent.

[0021] Preferably, the friction reducing agent is an organic molybdenum friction reducing agent.

[0022] Preferably, the solvent oil is one of D80 and D90.

[0023] Furthermore, the preparation method of the automobile fuel injection nozzle cleaning agent is as follows: adding the carbon deposit detergent, the friction reducing agent, the antioxidant and the anti-knock agent into the solvent oil, stirring and dispersing them evenly, and obtaining the automobile fuel injection nozzle cleaning agent.

[0024] Beneficial effects of the present invention:

[0025] The invention provides a highly efficient automobile fuel injection nozzle cleaning agent, wherein a carbon deposit cleaning agent having a branched amine and a polyisobutylene structure is added to the raw materials, thereby effectively improving the cleaning ability and efficiency of the cleaning agent for automobile fuel injection nozzles and avoiding the problem of carbon deposits in the combustion chamber caused by traditional polyisobutylene cleaning agents.

[0026] The present invention utilizes 4,4'-biphenol as a bridge. 4,4'-biphenol contains multiple reaction sites and a spatially rotatable structure, which effectively connects the branched amine and the polyisobutylene, thereby improving the stability of the polyisobutylene and the solubility of the branched amine, thereby improving the cleaning ability and reducing the carbon deposits in the combustion chamber.

[0027] The carbon deposit cleaner provided by the present invention has a branched amine structure which can be effectively adsorbed on the metal wall surface, preventing deposits while improving rust resistance, and can further improve rust resistance by combining with long alkyl chain polyisobutylene. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0029] The weight average molecular weight of the polyisobutylene in the examples of the present invention and the comparative examples is 1300.

[0030] Embodiment 1:

[0031] (1) 13 g of polyisobutylene, 1.86 g of 4,4'-biphenylphenol and 0.13 g of boron trifluoride etherate were added to 14.3 g of solvent oil D60, the temperature was raised to 80° C., and the mixture was stirred for reaction for 5 h. Then, 0.66 g of a 40 wt % formaldehyde aqueous solution and 0.6 g of ethylenediamine were added, the temperature was raised to 100° C., the mixture was stirred for reaction for 6 h, the mixture was washed with water, and rotary evaporated to obtain an amino monomer A;

[0032] (2) Add 9 g of ethylenediamine to 22 g of methanol, cool to 0°C, and add 13 g of methyl acrylate dropwise. After the addition is complete, stir and react for 3 h, and evaporate by rotary evaporation to obtain amino monomer B;

[0033] (3) Add 10 g of amino monomer A to 15 g of amino monomer B, raise the temperature to 140° C. under reduced pressure and vacuum, and react for 3 h to obtain a carbon deposit cleaning agent;

[0034] (4) 20 g of carbon deposit cleaner, 4 g of molybdenum dialkyl dithiocarbamate, 1 g of 2,6-di-tert-butyl-p-cresol, 0.5 g of tris(2,4-di-tert-butylphenyl)phosphite and 2 g of methyl tert-butyl ether were added to 45 g of solvent oil D80, and the mixture was stirred and dispersed uniformly to obtain an automobile fuel injection nozzle cleaning agent.

[0035] Embodiment 2:

[0036] (1) 13 g of polyisobutylene, 1.86 g of 4,4'-biphenylphenol and 0.12 g of boron trifluoride etherate were added to 15.6 g of solvent oil D60, the temperature was raised to 85° C., and the mixture was stirred for reaction for 6 h. Then, 0.72 g of a 40 wt % formaldehyde aqueous solution and 0.6 g of ethylenediamine were added, the temperature was raised to 105° C., the mixture was stirred for reaction for 7 h, and the mixture was washed with water and rotary evaporated to obtain an amino monomer A;

[0037] (2) Add 9 g of ethylenediamine to 35 g of methanol, cool to 0-5° C., and add 13 g of methyl acrylate dropwise. After the addition is complete, stir and react for 3.5 h, and evaporate by rotary evaporation to obtain amino monomer B;

[0038] (3) Add 10 g of amino monomer A to 18.5 g of amino monomer B, raise the temperature to 145° C. under reduced pressure and vacuum, and react for 4 h to obtain a carbon deposit cleaning agent;

[0039] (4) 25 g of carbon deposit cleaner, 5 g of molybdenum dialkyl dithiocarbamate, 1.2 g of 2,6-di-tert-butyl-p-cresol, 0.8 g of tris(2,4-di-tert-butylphenyl)phosphite and 2.5 g of methyl tert-butyl ether were added to 60 g of solvent oil D80, and the mixture was stirred and dispersed uniformly to obtain an automobile fuel injection nozzle cleaning agent.

[0040] Embodiment 3:

[0041] (1) 13 g of polyisobutylene, 1.86 g of 4,4'-biphenylphenol and 0.12 g of boron trifluoride etherate were added to 15.6 g of solvent oil D60, the temperature was raised to 85° C., and the mixture was stirred for reaction for 6 h. Then, 0.72 g of a 40 wt % formaldehyde aqueous solution and 0.6 g of ethylenediamine were added, the temperature was raised to 105° C., the mixture was stirred for reaction for 7 h, and the mixture was washed with water and rotary evaporated to obtain an amino monomer A;

[0042] (2) Add 9 g of ethylenediamine to 43 g of methanol, cool to 0°C, and add 13 g of methyl acrylate dropwise. After the addition is complete, stir and react for 4 h, and evaporate by rotary evaporation to obtain amino monomer B;

[0043] (3) Add 10 g of amino monomer A to 22 g of amino monomer B, raise the temperature to 150° C. under reduced pressure and vacuum, and react for 5 h to obtain a carbon deposit cleaning agent;

[0044] (4) 30 g of carbon deposit cleaner, 6 g of molybdenum dialkyl dithiocarbamate, 1.5 g of 2,6-di-tert-butyl-p-cresol, 1 g of tris(2,4-di-tert-butylphenyl)phosphite and 3 g of methyl tert-butyl ether were added to 70 g of solvent oil D80, and the mixture was stirred and dispersed uniformly to obtain an automobile fuel injection nozzle cleaning agent.

[0045] Comparative Example 1:

[0046] (1) 13 g of polyisobutylene, 0.94 g of phenol and 0.12 g of boron trifluoride etherate were added to 15.6 g of solvent oil D60, the temperature was raised to 85° C., and the mixture was stirred for reaction for 6 h. Then, 0.72 g of a 40 wt % formaldehyde aqueous solution and 0.6 g of ethylenediamine were added, the temperature was raised to 105° C., the mixture was stirred for reaction for 7 h, and the mixture was washed with water and rotary evaporated to obtain an amino monomer A;

[0047] (2) Add 9 g of ethylenediamine to 35 g of methanol, cool to 0-5° C., and add 13 g of methyl acrylate dropwise. After the addition is complete, stir and react for 3.5 h, and evaporate by rotary evaporation to obtain amino monomer B;

[0048] (3) Add 10 g of amino monomer A to 18.5 g of amino monomer B, raise the temperature to 145° C. under reduced pressure and vacuum, and react for 4 h to obtain a carbon deposit cleaning agent;

[0049] (4) 25 g of carbon deposit cleaner, 5 g of molybdenum dialkyl dithiocarbamate, 1.2 g of 2,6-di-tert-butyl-p-cresol, 0.8 g of tris(2,4-di-tert-butylphenyl)phosphite and 2.5 g of methyl tert-butyl ether were added to 60 g of solvent oil D80, and the mixture was stirred and dispersed uniformly to obtain an automobile fuel injection nozzle cleaning agent.

[0050] Comparative Example 2:

[0051] (1) 13 g of polyisobutylene, 1.86 g of 4,4'-biphenylphenol and 0.12 g of boron trifluoride etherate were added to 15.6 g of solvent oil D60, the temperature was raised to 85° C., and the mixture was stirred for reaction for 6 h. Then, 0.72 g of a 40 wt % formaldehyde aqueous solution and 0.6 g of ethylenediamine were added, the temperature was raised to 105° C., the mixture was stirred for reaction for 7 h, and the mixture was washed with water and rotary evaporated to obtain an amino monomer A;

[0052] (2) 25 g of amino monomer A, 5 g of dialkyl dithiocarbamate molybdenum, 1.2 g of 2,6-di-tert-butyl-p-cresol, 0.8 g of tris(2,4-di-tert-butylphenyl)phosphite and 2.5 g of methyl tert-butyl ether were added to 60 g of solvent oil D80, stirred and dispersed uniformly, to obtain an automobile fuel injection nozzle cleaning agent.

[0053] Comparative Example 3:

[0054] (1) Add 9 g of ethylenediamine to 43 g of methanol, cool to 0°C, and add 13 g of methyl acrylate dropwise. After the addition is complete, stir and react for 4 h, and evaporate by rotary evaporation to obtain amino monomer B;

[0055] (2) 30 g of amino monomer B, 6 g of dialkyl dithiocarbamate molybdenum, 1.5 g of 2,6-di-tert-butyl-p-cresol, 1 g of tris(2,4-di-tert-butylphenyl)phosphite and 3 g of methyl tert-butyl ether were added to 70 g of solvent oil D80, stirred and dispersed uniformly, to obtain an automobile fuel injection nozzle cleaning agent.

[0056] Performance Test:

[0057] Injector nozzle cleaning test: According to the GB / T 19230 method, the cleaning nozzle that passed the flow inspection was assembled on the engine. Under the working conditions required by the method, the engine was operated for 10 hours. The change in air flow of the nozzle before and after the test was measured. The air flow loss rate was used to represent the cleaning ability of the injector nozzle cleaning agent on the injector. The results are shown in Table 1.

[0058] Cleanliness test: According to the GB / T 19230 method, the intake valve deposit reduction rate and the combustion chamber deposit reduction rate were tested respectively. The results are shown in Table 1.

[0059] Rust resistance test: According to the GB / T 19230 method, a cylindrical test rod was completely immersed in a stirred mixture of 300 mL of experimental gasoline (detergent addition amount was 300 μg / g) and 30 mL of distilled water at (38±1)°C for 4 hours to observe the rust degree of the test rod. The results are shown in Table 1.

[0060] Table 1 Performance test results

[0061]

[0062]

[0063] Data Analysis:

[0064] It can be seen from the data of Examples 1-3 that the addition of the automobile fuel injector cleaning agent prepared by the present invention can effectively reduce the air flow loss rate of the engine fuel injector after operation, which shows that it has an excellent fuel injector cleaning effect, and from the cleanliness data, it can be seen that the automobile fuel injector cleaning agent prepared by the present invention can greatly improve the intake valve deposit reduction rate and effectively improve the combustion chamber deposit reduction rate, which shows that the automobile fuel injector cleaning agent has a tendency to reduce deposit formation, has good cleanliness, and avoids the problem of traditional cleaning agents causing carbon deposits in the combustion chamber.

[0065] It can be seen from the data of Example 2 and Comparative Example 1 that 4,4'-biphenol can further improve the cleaning effect and cleaning ability of the fuel injector relative to phenol. This is mainly because 4,4'-biphenol can effectively graft polyisobutylene and branched amines, while phenol may find it difficult to achieve simultaneous grafting of polyisobutylene and branched amines on the benzene ring due to steric hindrance.

[0066] From the data of Example 2 and Comparative Examples 2-3, it can be seen that the grafting of polyisobutylene and branched amine on the benzene ring is crucial to the cleaning effect of the automobile fuel injection nozzle cleaning agent. Using amino monomer B or amino monomer A without branched amine as a carbon deposit cleaning agent alone will lead to a decrease in the cleaning and cleaning effect of the automobile fuel injection nozzle cleaning agent, and its rust resistance will also be greatly reduced. This is mainly because the branched amine is easy to combine with the metal wall, adsorb on the surface of the metal wall, occupy the formation medium of the deposit, and can effectively prevent the formation process of the deposit. The branched amine is also weakly alkaline and is easy to combine with the weakly acidic colloid group in the fuel oil, making it difficult to agglomerate, and preventing the colloid group from polymerizing to form carbon deposits. For the engine deposits that have already formed, the branched amine can also be firmly adsorbed on the surface of the deposits to prevent the continued growth of the deposits. At the same time, it can loosen the combination of the deposits and disperse the combined deposit groups into the fuel oil through the active effect, thereby achieving a higher cleaning effect.

[0067] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A highly efficient automobile fuel injection nozzle cleaning agent, characterized in that: The preparation method is prepared from the following raw materials by weight: 20-30 parts of carbon deposit detergent, 4-6 parts of friction reducer, 1.5-2.5 parts of antioxidant, 2-3 parts of anti-knock agent and 45-70 parts of solvent oil; The preparation method of the carbon deposit cleaning agent is as follows: (1) adding polyisobutylene, 4,4'-biphenyldiphenol and a catalyst into solvent oil D60, heating to 80-85° C., stirring and reacting for 5-6 hours, then adding a 40 wt% formaldehyde aqueous solution and ethylenediamine, heating to 100-105° C., stirring and reacting for 6-7 hours, washing with water, and rotary evaporation to obtain an amino monomer A; (2) Add ethylenediamine to methanol, cool to 0°C, and add methyl acrylate dropwise. After the addition is complete, stir and react for 3-4 hours, and then evaporate to obtain amino monomer B; (3) adding amino monomer A to amino monomer B, heating to 140-150° C. under reduced pressure and vacuum conditions, reacting for 3-5 hours to obtain a carbon deposit cleaning agent; The molar ratio of polyisobutylene, 4,4'-biphenol and ethylenediamine in step (1) is 1:1:1; the amount of the formaldehyde aqueous solution added in step (1) is 110%-120% of the total weight of ethylenediamine; In the step (2), the molar ratio of ethylenediamine to methyl acrylate is 1:1.05; In the step (3), the weight ratio of the amino monomer A to the amino monomer B is 10:15-22.

2. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: In the step (1), the catalyst is boron trifluoride ethyl ether, and the amount of the catalyst added is 1% of the weight of the polyisobutylene.

3. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: The weight average molecular weight of the polyisobutylene in step (1) is 1200-1500.

4. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: The amount of solvent oil D60 added in step (1) is 150%-200% of the weight of polyisobutylene.

5. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: The amount of methanol added in step (2) is 100%-200% of the total weight of ethylenediamine and methyl acrylate.

6. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: The antioxidant is a mixture of 2,6-di-tert-butyl-p-cresol and tris(2,4-di-tert-butylphenyl)phosphite.

7. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: The anti-knock agent is an ether anti-knock agent.

8. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: The friction reducing agent is an organic molybdenum friction reducing agent.

9. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: The solvent oil is one of D80 and D90.

10. The highly efficient automobile fuel injection nozzle cleaning agent according to claim 1, characterized in that: The preparation method of the automobile fuel injection nozzle cleaning agent is as follows: adding a carbon deposit detergent, a friction reducing agent, an antioxidant and an anti-knock agent into solvent oil, stirring and dispersing the mixture evenly, and obtaining the automobile fuel injection nozzle cleaning agent.

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