Cleaning agent for inner cavity of internal combustion engine

Abstract

The invention provides a cleaning agent for an inner cavity of an internal combustion engine of an engine. The cleaning agent comprises a surfactant, a corrosion inhibitor, an antirust agent, organic acid, organic alkali, an organic solvent and an inorganic solvent, wherein the ratio of the surfactant to the corrosion inhibitor to the antirust agent to the organic acid to the organic alkali to the solvent is (2.5 to 3.5) to (0.3 to 0.5) to (0.1 to 0.3) to (1.5 to 2.0) to (2.5 to 3.0) to (7.5 to 8.5) to (83 to 84), and the ratio is a weight ratio. The internal combustion engine cleaning agent contains more than 10% of non-volatile matters, and is high in physical and chemical stability and easy to store.

Description

Technical Field

[0001] The invention relates to the technical field of chemical engineering, and in particular to an aqueous cleaning agent and a preparation method thereof. Background Art

[0002] Internal combustion engine cleaning mainly includes cleaning of the engine cylinder, fuel injector, throttle valve, and intake duct. Cleaning of the engine cylinder is usually done by adding cleaning agents during maintenance, allowing the engine to clean itself through piston movement. Since the cleaning agent needs to enter the engine for circulation, the selection of cleaning agents is very important for engine maintenance. If the selection is not good, it may not only fail to achieve the cleaning function, but also damage the engine.

[0003] In order to improve solubility, traditional internal combustion engine cleaning agents are usually based on oily bases and organic solvents, and have poor environmental performance. There are also some water-based cleaning agents in the prior art, but in order to ensure the cleaning effect, some cleaning materials with strong chemical activity are usually added. For example, Chinese patent document CN201210518516.6 discloses an internal combustion engine cleaning agent, which contains tetrafluoroethylene, ammonia water, kerosene and other ingredients. Although the cleaning ability is acceptable, the stability is poor and it is easy to corrode other parts of the internal combustion engine.

[0004] Therefore, it is necessary to provide an aqueous cleaning agent that can ensure both stability and cleaning effect. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an internal cavity cleaning agent for an internal combustion engine of an engine in view of the problems existing in the background technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An engine internal combustion engine cavity cleaning agent, comprising a surfactant, a corrosion inhibitor, a rust inhibitor, an organic acid, an organic base, an organic solvent and an inorganic solvent;

[0008] Among them, the ratio of the surfactant, corrosion inhibitor, rust inhibitor, organic acid, organic base and solvent is (2.5-3.5): (0.3-0.5): (0.1-0.3): (1.5-2.0): (2.5-3.0): (7.5-8.5): (83-84), and the ratio is a weight ratio.

[0009] Preferably, the cleaning agent for the internal cavity of an internal combustion engine of the present invention is composed of a surfactant, a corrosion inhibitor, a rust inhibitor, an organic acid, an organic base and a solvent;

[0010] Among them, the ratio of the surfactant, corrosion inhibitor, rust inhibitor, organic acid, organic base and solvent is (2.5-3.5): (0.3-0.5): (0.1-0.3): (1.5-2.0): (2.5-3.0): (7.5-8.5): (83-84), and the ratio is a weight ratio.

[0011] Preferably, the surfactant is composed of isomeric tridecyl alcohol polyoxyethylene ether and cocamidopropyl betaine with a mass concentration of 35%.

[0012] Preferably, the corrosion inhibitor is methylbenzotriazole TTA.

[0013] Preferably, the organic base is triethanolamine.

[0014] Preferably, the rust inhibitor is triethanolamine borate.

[0015] Preferably, the organic solvent consists of propylene glycol butyl ether and dipropylene glycol monomethyl ether.

[0016] Preferably, the organic solvent consists of propylene glycol butyl ether and 1-(2-methoxy-1-methylethoxy)isopropanol.

[0017] Preferably, the non-volatile matter content of the cleaning agent for the inner cavity of the internal combustion engine is not less than 11%.

[0018] On this basis, the present invention also provides a method for preparing an engine internal combustion engine inner cavity cleaning agent, the preparation method can prepare the above-mentioned engine internal combustion engine inner cavity cleaning agent, and comprises the following steps:

[0019] (1) Weighing an inorganic solvent and starting stirring;

[0020] (2) under stirring, add the formulated amount of isomeric tridecanol polyoxyethylene ether and stir until uniform;

[0021] (3) Add the formulated amount of cocamidopropyl betaine and stir until uniform;

[0022] (4) Add the formulated amount of methylbenzotriazole and stir until uniform;

[0023] (5) Add the formulated amount of triethanolamine borate and stir until uniform;

[0024] (6) Add the formulated amount of propylene glycol butyl ether and stir until uniform;

[0025] (7) Add the formulated amount of dipropylene glycol monomethyl ether and stir until uniform;

[0026] (8) Add the formulated amount of triethanolamine and stir until uniform;

[0027] (9) Add the formulated amount of oleic acid and stir until uniform.

[0028] The beneficial effects of the present invention are:

[0029] (1) The internal combustion engine cleaning agent of the present invention is a water-based base. By mixing the water-based base and the organic solvent, the organic solvent can fully exert its solubility for carbon deposits during use.

[0030] (2) The non-volatile matter content of the internal combustion engine cleaning agent of the present invention exceeds 10%, the physicochemical stability is high, and the cleaning agent is easy to store.

[0031] (3) The organic matter in the formula selected by the present invention has low toxicity and strong specificity, and can avoid corrosion to other parts while ensuring the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is the FTIR spectrum of the product obtained in Example 1 of the present invention.

[0033] Figure 2 The original deuterated aqueous phase of the product obtained in Example 1 of the present invention 1 H-NMR spectrum.

[0034] Figure 3 The original deuterated aqueous maleic acid obtained from Example 1 of the present invention 1 H-NMR internal standard spectrum.

[0035] Figure 4 This is the total ion current diagram of the original chloroform extract of the product obtained in Example 1 of the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention is specifically, clearly and completely described in the following embodiments in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Moreover, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work, any modifications, equivalent substitutions, improvements, etc., should be included in the protection scope of the present invention.

[0037] Example 1

[0038] The present embodiment provides an engine internal combustion engine cavity cleaning agent, including 2 parts of isomeric tridecanol polyoxyethylene ether (E1308) as a surfactant, 0.5 parts of cocamidopropyl betaine (CAB-35) as a surfactant, 0.3 parts of methylbenzotriazole (TTA) as a corrosion inhibitor, 0.1 parts of triethanolamine borate (283-56-7) as a rust inhibitor, 1.5 parts of oleic acid (organic acid), 2.5 parts of triethanolamine (organic base), 4.5 parts of propylene glycol butyl ether and 3 parts of dipropylene glycol monomethyl ether as organic solvents, and 84 parts of water, all of which are parts by weight.

[0039] Mix the above formula as follows:

[0040] S1, weigh the water of the formula, start stirring, and control the speed between 100 and 400 rpm;

[0041] S2, add the formulated amount of isomeric tridecanol polyoxyethylene ether and stir evenly;

[0042] S3, add the formulated amount of cocamidopropyl betaine and stir until uniform;

[0043] (4) Add the formulated amount of methylbenzotriazole and stir until uniform;

[0044] (5) Add the formulated amount of triethanolamine borate and stir until uniform;

[0045] (6) Add the formulated amount of propylene glycol butyl ether and stir until uniform;

[0046] (7) Add the formulated amount of dipropylene glycol monomethyl ether and stir until uniform;

[0047] (8) Add the formulated amount of triethanolamine and stir until uniform;

[0048] (9) Add the formulated amount of oleic acid and stir until uniform to obtain the product.

[0049] The pH value of the product was tested using a pH meter, and the results are shown in Table 1.

[0050] The samples were heated at 105°C for 4 hours and the non-volatile content was tested. The results are shown in Table 2.

[0051] After drying the sample, the composition test was carried out and the results were as follows: Figure 1 The FTIR spectrum shown is Figure 2 The original deuterated water phase shown 1 H-NMR spectrum, such as Figure 3 Deuterated aqueous maleic acid as shown 1 H-NMR internal standard spectrum, such as Figure 4 The total ion current of the chloroform extract is shown. The above diagram verifies the composition of this example.

[0052] Example 2

[0053] The present embodiment provides an engine internal combustion engine cavity cleaning agent, including 2.5 parts of isotridecyl alcohol polyoxyethylene ether (E1308) as a surfactant, 1.0 part of cocamidopropyl betaine (CAB-35) as a surfactant, 0.5 part of methylbenzotriazole (TTA) as a corrosion inhibitor, 0.3 part of triethanolamine borate (283-56-7) as a rust inhibitor, 2.0 parts of oleic acid (organic acid), 3.0 parts of triethanolamine (organic base), 5.0 parts of propylene glycol butyl ether and 3.5 parts of dipropylene glycol monomethyl ether as organic solvents, and 83 parts of water, all of which are parts by weight.

[0054] Mix the above formula as follows:

[0055] S1, weigh the water of the formula, start stirring, and control the speed between 100 and 400 rpm;

[0056] S2, add the formulated amount of isomeric tridecanol polyoxyethylene ether and stir evenly;

[0057] S3, add the formulated amount of cocamidopropyl betaine and stir until uniform;

[0058] (4) Add the formulated amount of methylbenzotriazole and stir until uniform;

[0059] (5) Add the formulated amount of triethanolamine borate and stir until uniform;

[0060] (6) Add the formulated amount of propylene glycol butyl ether and stir until uniform;

[0061] (7) Add the formulated amount of dipropylene glycol monomethyl ether and stir until uniform;

[0062] (8) Add the formulated amount of triethanolamine and stir until uniform;

[0063] (9) Add the formulated amount of oleic acid and stir until uniform to obtain the product.

[0064] The pH value of the product was tested using a pH meter, and the results are shown in Table 1.

[0065] The samples were heated at 105°C for 4 hours and the non-volatile content was tested. The results are shown in Table 2.

[0066] Example 3

[0067] The present embodiment provides an engine internal combustion engine cavity cleaning agent, including 2.1 parts of isotridecyl polyoxyethylene ether (E1308) as a surfactant, 0.6 parts of cocamidopropyl betaine (CAB-35) as a surfactant, 0.35 parts of methylbenzotriazole (TTA) as a corrosion inhibitor, 0.15 parts of triethanolamine borate (283-56-7) as a rust inhibitor, 1.6 parts of oleic acid (organic acid), 2.6 parts of triethanolamine (organic base), 4.6 parts of propylene glycol butyl ether and 3.2 parts of dipropylene glycol monomethyl ether as organic solvents, and 83.5 parts of water, all of which are parts by weight.

[0068] Mix the above formula as follows:

[0069] S1, weigh the water of the formula, start stirring, and control the speed between 100 and 400 rpm;

[0070] S2, add the formulated amount of isomeric tridecanol polyoxyethylene ether and stir evenly;

[0071] S3, add the formulated amount of cocamidopropyl betaine and stir until uniform;

[0072] (4) Add the formulated amount of methylbenzotriazole and stir until uniform;

[0073] (5) Add the formulated amount of triethanolamine borate and stir until uniform;

[0074] (6) Add the formulated amount of propylene glycol butyl ether and stir until uniform;

[0075] (7) Add the formulated amount of dipropylene glycol monomethyl ether and stir until uniform;

[0076] (8) Add the formulated amount of triethanolamine and stir until uniform;

[0077] (9) Add the formulated amount of oleic acid and stir until uniform to obtain the product.

[0078] The pH value of the product was tested using a pH meter, and the results are shown in Table 1.

[0079] The samples were heated at 105°C for 4 hours and the non-volatile content was tested. The results are shown in Table 2.

[0080] Example 4

[0081] The present embodiment provides an engine internal combustion engine cavity cleaning agent, including 2.3 parts of isotridecyl polyoxyethylene ether (E1308) as a surfactant, 0.8 parts of cocamidopropyl betaine (CAB-35) as a surfactant, 0.4 parts of methylbenzotriazole (TTA) as a corrosion inhibitor, 0.2 parts of triethanolamine borate (283-56-7) as a rust inhibitor, 1.8 parts of oleic acid (organic acid), 2.8 parts of triethanolamine (organic base), 4.8 parts of propylene glycol butyl ether and 3.4 parts of dipropylene glycol monomethyl ether as organic solvents, and 83.5 parts of water, all of which are parts by weight.

[0082] Mix the above formula as follows:

[0083] S1, weigh the water of the formula, start stirring, and control the speed between 100 and 400 rpm;

[0084] S2, add the formulated amount of isomeric tridecanol polyoxyethylene ether and stir evenly;

[0085] S3, add the formulated amount of cocamidopropyl betaine and stir until uniform;

[0086] (4) Add the formulated amount of methylbenzotriazole and stir until uniform;

[0087] (5) Add the formulated amount of triethanolamine borate and stir until uniform;

[0088] (6) Add the formulated amount of propylene glycol butyl ether and stir until uniform;

[0089] (7) Add the formulated amount of dipropylene glycol monomethyl ether and stir until uniform;

[0090] (8) Add the formulated amount of triethanolamine and stir until uniform;

[0091] (9) Add the formulated amount of oleic acid and stir until uniform to obtain the product.

[0092] The pH value of the product was tested using a pH meter, and the results are shown in Table 1.

[0093] The samples were heated at 105°C for 4 hours and the non-volatile content was tested. The results are shown in Table 2.

[0094] Table 1

[0095] Example Example 1 Example 2 Example 3 Example 4 pH 8.14 7.96 8.07 8.13

[0096] Table 2

[0097] Example Example 1 Example 2 Example 3 Example 4 Non-volatile matter content (wt.%) 11.91％ 11.28％ 11.56％ 11.72％

Claims

1. A cleaning agent for the inner cavity of an internal combustion engine, characterized in that: Including surfactants, corrosion inhibitors, rust inhibitors, organic acids, organic bases, organic solvents and inorganic solvents; Among them, the ratio of the surfactant, corrosion inhibitor, rust inhibitor, organic acid, organic base and solvent is (2.5-3.5): (0.3-0.5): (0.1-0.3): (1.5-2.0): (2.5-3.0): (7.5-8.5): (83-84), and the ratio is a weight ratio.

2. The cleaning agent for the inner cavity of an internal combustion engine according to claim 1, characterized in that: It is composed of surfactant, corrosion inhibitor, rust inhibitor, organic acid, organic base and solvent; Among them, the ratio of the surfactant, corrosion inhibitor, rust inhibitor, organic acid, organic base and solvent is (2.5-3.5): (0.3-0.5): (0.1-0.3): (1.5-2.0): (2.5-3.0): (7.5-8.5): (83-84), and the ratio is a weight ratio.

3. An internal combustion engine cleaning agent according to claim 1 or 2, characterized in that: The surfactant consists of isomeric tridecanol polyoxyethylene ether and cocamidopropyl betaine with a mass concentration of 35%.

4. An internal combustion engine cleaning agent according to claim 1 or 2, characterized in that: The corrosion inhibitor is methylbenzotriazole TTA.

5. The cleaning agent for the inner cavity of an internal combustion engine according to claim 1 or 2, characterized in that: The organic base is triethanolamine.

6. The cleaning agent for the inner cavity of an internal combustion engine according to claim 1 or 2, characterized in that: The rust inhibitor is triethanolamine borate.

7. An internal combustion engine cleaning agent according to claim 1 or 2, characterized in that: The organic solvent consists of propylene glycol butyl ether and dipropylene glycol monomethyl ether.

8. The cleaning agent for the inner cavity of an internal combustion engine according to claim 1 or 2, characterized in that: The organic solvent consists of propylene glycol butyl ether and 1-(2-methoxy-1-methylethoxy)isopropanol.

9. The cleaning agent for the inner cavity of an internal combustion engine according to claim 1 or 2, characterized in that: The non-volatile matter content of the cleaning agent for the internal combustion engine cavity is not less than 11%.

10. A method for preparing a cleaning agent for the inner cavity of an internal combustion engine, characterized in that: The cleaning agent is configured to prepare the cleaning agent for the internal cavity of an internal combustion engine according to claim 1 or 2, and the preparation method comprises the following steps: (1) Weighing an inorganic solvent and starting stirring; (2) under stirring, adding isomeric tridecanol polyoxyethylene ether according to the ratio described in claim 1 or 2, and stirring until uniform; (3) Add cocamidopropyl betaine according to the ratio of claim 1 or 2 and stir until uniform; (4) Add the formulated amount of methylbenzotriazole and stir until uniform; (5) Add the formulated amount of triethanolamine borate and stir until uniform; (6) Add the formulated amount of propylene glycol butyl ether and stir until uniform; (7) Add the formulated amount of dipropylene glycol monomethyl ether and stir until uniform; (8) Add the formulated amount of triethanolamine and stir until uniform; (9) Add the formulated amount of oleic acid and stir until uniform.

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