Methanol modified additive and preparation method thereof

Abstract

The invention provides a methanol modified additive and a preparation method thereof, and relates to the field of methanol fuel. Comprising 7-30 parts of a corrosion inhibitor, 10-30 parts of dimer acid, 20-50 parts of alkylphenol polyoxypropylene ether amine, 5-20 parts of an antioxidant, 1-5 parts of dimethyl carbonate, 5-10 parts of fatty acid methyl ester and 1-10 parts of a stabilizer. The preparation method comprises the following steps: adding alkylphenol polyoxypropylene ether amine, dimer acid, dimethyl carbonate and fatty acid methyl ester into a container, and uniformly stirring to obtain a first mixture; uniformly stirring a corrosion inhibitor, an antioxidant and a stabilizer to obtain a second mixture; and adding the second mixture into the first mixture under the stirring action of 500-800r / min, and then stirring for 10-20min. The methanol fuel additive has corrosion resistance and can improve the combustion efficiency of methanol fuel and reduce the corrosion of the methanol fuel to equipment.

Description

Technical Field

[0001] The invention relates to the field of methanol fuel, and in particular to a methanol modified additive and a preparation method thereof. Background Art

[0002] Methanol is a clean energy source with the most complete combustion and the highest heat conversion rate. After combustion, it only emits carbon dioxide and water, which pollutes the environment. However, methanol is a flammable liquid with extremely low stability. At a temperature of 64°C, it can change from liquid phase to gas phase, that is, methanol vapor. Methanol vapor is very harmful to the human body. Excessive inhalation of methanol will cause poisoning symptoms such as blindness, blurred vision, headache and chest tightness. At the same time, methanol vapor accumulates in a confined space, and even a weak spark can ignite it, posing a huge safety hazard. Large amounts of methanol evaporation will also reduce the quality of oil products and cause waste.

[0003] In order to improve the stability and combustion performance of methanol fuel, it is necessary to add modifiers to methanol to reduce the corrosion of methanol to equipment and improve the stability of methanol. However, existing methanol modification additives have various problems, such as incomplete combustion, insufficient power, high fuel consumption, etc., which make it difficult to apply them on a large scale. Summary of the invention

[0004] The object of the present invention is to provide a methanol modified additive which has anti-corrosion properties, can improve the combustion efficiency of methanol fuel, and reduce the corrosion of methanol fuel to equipment.

[0005] Another object of the present invention is to provide a method for preparing a methanol-modified additive, which is simple, efficient and has low requirements on equipment.

[0006] The present invention solves the technical problem by adopting the following technical solutions.

[0007] On the one hand, an embodiment of the present invention provides a methanol modification additive, which includes the following raw materials in parts by weight:

[0008] 7-30 parts of corrosion inhibitor, 10-30 parts of dimer acid, 20-50 parts of alkylphenol polyoxypropylene ether amine, 5-20 parts of antioxidant, 1-5 parts of dimethyl carbonate, 5-10 parts of fatty acid methyl ester, and 1-10 parts of stabilizer.

[0009] In some embodiments of the present invention, the following raw materials are included by weight:

[0010] 20 parts of corrosion inhibitor, 30 parts of dimer acid, 25 parts of alkylphenol polyoxypropylene ether amine, 10 parts of antioxidant, 3 parts of dimethyl carbonate, 8 parts of fatty acid methyl ester, and 5 parts of stabilizer.

[0011] In some embodiments of the present invention, the following raw materials are included by weight:

[0012] 30 parts of corrosion inhibitor, 20 parts of dimer acid, 50 parts of alkylphenol polyoxypropylene ether amine, 15 parts of antioxidant, 5 parts of dimethyl carbonate, 5 parts of fatty acid methyl ester, and 10 parts of stabilizer.

[0013] In some embodiments of the present invention, the corrosion inhibitor includes a mixture of one or more of benzotriazole, tolutriazole and ammonium benzoate.

[0014] In some embodiments of the present invention, the stabilizer is one of zinc peroxide and cyclohexylamine or a mixture of the two.

[0015] In some embodiments of the present invention, the antioxidant is 2,4-di-tert-butylphenol or p-tert-butylphenol.

[0016] On the other hand, an embodiment of the present invention provides a method for preparing a methanol modified additive, characterized in that it comprises the following steps:

[0017] S1, adding alkylphenol polyoxypropylene ether amine, dimer acid, dimethyl carbonate and fatty acid methyl ester into a container, stirring evenly to obtain a first mixture;

[0018] S2, stirring the corrosion inhibitor, antioxidant and stabilizer to obtain a second mixture;

[0019] S3, adding the second mixture to the first mixture under stirring at 500-800 r / min, and stirring for another 10-20 minutes.

[0020] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0021] The methanol modified additive provided by the present invention can significantly improve the combustion performance of methanol fuel, reduce pollutant emissions, and extend the service life of automobiles. The corrosion inhibitor can form a protective film on the surface of metal equipment to reduce the corrosion of methanol fuel to the equipment. Dimer acid acts as a lubricant to reduce the direct adhesion between methanol fuel and equipment. Dimethyl carbonate and fatty acid methyl ester act as combustion aids to improve the combustion efficiency of methanol fuel. Antioxidants can effectively prevent methanol fuel from deteriorating due to oxidation during storage and use, and can absorb and transform harmful active oxygen free radicals, thereby protecting the fuel from oxidation damage and extending the service life of the fuel. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to specific embodiments.

[0024] The embodiment of the present invention provides a methanol modification additive, which includes the following raw materials in parts by weight:

[0025] 7-30 parts of corrosion inhibitor, 10-30 parts of dimer acid, 20-50 parts of alkylphenol polyoxypropylene ether amine, 5-20 parts of antioxidant, 1-5 parts of dimethyl carbonate, 5-10 parts of fatty acid methyl ester, and 1-10 parts of stabilizer.

[0026] More preferably, the following raw materials are included by weight: 20 parts of corrosion inhibitor, 30 parts of dimer acid, 25 parts of alkylphenol polyoxypropylene ether amine, 10 parts of antioxidant, 3 parts of dimethyl carbonate, 8 parts of fatty acid methyl ester, and 5 parts of stabilizer.

[0027] Preferably, the following raw materials are included by weight: 30 parts of corrosion inhibitor, 20 parts of dimer acid, 50 parts of alkylphenol polyoxypropylene ether amine, 15 parts of antioxidant, 5 parts of dimethyl carbonate, 5 parts of fatty acid methyl ester, and 10 parts of stabilizer.

[0028] In an embodiment of the present invention, the corrosion inhibitor comprises a mixture of one or more of benzotriazole, tolutriazole and ammonium benzoate. The corrosion inhibitor can form a protective film on the metal surface to reduce the attachment of methanol to metal equipment. Specifically, the benzotriazole molecule has a polar group and a relatively long hydrocarbon chain, which can be directionally adsorbed on the metal surface to form a very thin protective film. This protective film can resist the intrusion of corrosive media such as water and oxygen into the metal surface, thereby reducing the probability and rate of metal corrosion. The molecular structure of tolutriazole contains a benzene ring and three nitrogen atoms. The nitrogen atoms can form coordination bonds with metal ions, thereby having a strong adsorption effect on the metal surface, which can effectively prevent the contact between the corrosive medium and the metal surface and play a corrosion inhibition role.

[0029] In some embodiments of the present invention, the stabilizer is one of zinc peroxide and cyclohexylamine or a mixture of the two. Zinc peroxide is highly active after high-temperature pyrolysis in the engine, and can remove organic peroxides produced when methanol burns in the absence of oxygen. Secondly, the trace oxygen released during the pyrolysis of zinc peroxide itself produces a "micro-explosion effect" to cause the formaldehyde generated by the oxygen-deficient combustion of methanol to produce "explosive" combustion, thereby promoting the full combustion of alcohol ether fuels such as methanol and improving the combustion efficiency of methanol fuel. Cyclohexylamine is used in combination with an antioxidant to improve the corrosion resistance and swelling of methanol fuel. Cyclohexylamine can also improve the low-temperature fluidity of the fuel, so that it can start and run smoothly in a cold environment.

[0030] In some embodiments of the present invention, the antioxidant is 2,4-di-tert-butylphenol or p-tert-butylphenol. It can effectively prevent methanol fuel from deteriorating due to oxidation during storage and use, absorb and transform harmful active oxygen free radicals, thereby protecting the fuel from oxidation damage and extending the service life of the fuel. It can also prevent methanol from generating excessive sediments and colloids during combustion, keeping the engine clean and running efficiently.

[0031] On the other hand, an embodiment of the present invention provides a method for preparing a methanol modified additive, characterized in that it comprises the following steps:

[0032] S1, adding alkylphenol polyoxypropylene ether amine, dimer acid, dimethyl carbonate and fatty acid methyl ester into a container, stirring evenly to obtain a first mixture;

[0033] S2, stirring the corrosion inhibitor, antioxidant and stabilizer to obtain a second mixture;

[0034] S3, adding the second mixture to the first mixture under stirring at 500-800 r / min, and stirring for another 10-20 minutes.

[0035] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0036] Example 1

[0037] Prepare the raw materials according to the following ratio:

[0038] 20 parts of corrosion inhibitor, 30 parts of dimer acid, 25 parts of alkylphenol polyoxypropylene ether amine, 10 parts of antioxidant, 3 parts of dimethyl carbonate, 8 parts of fatty acid methyl ester, and 5 parts of stabilizer.

[0039] Among them, the corrosion inhibitor is benzotriazole, the stabilizer is cyclohexylamine, and the antioxidant is p-tert-butylphenol.

[0040] The methanol modified additive was prepared as follows:

[0041] S1, adding alkylphenol polyoxypropylene ether amine, dimer acid, dimethyl carbonate and fatty acid methyl ester into a container, stirring evenly to obtain a first mixture;

[0042] S2, stirring the corrosion inhibitor, antioxidant and stabilizer to obtain a second mixture;

[0043] S3, adding the second mixture to the first mixture under stirring at 500-550 r / min, and stirring for another 20 minutes.

[0044] Example 2

[0045] Prepare the raw materials according to the following ratio:

[0046] 30 parts of corrosion inhibitor, 20 parts of dimer acid, 50 parts of alkylphenol polyoxypropylene ether amine, 15 parts of antioxidant, 5 parts of dimethyl carbonate, 5 parts of fatty acid methyl ester, and 10 parts of stabilizer.

[0047] Among them, the corrosion inhibitor is benzotriazole, the stabilizer is cyclohexylamine, and the antioxidant is p-tert-butylphenol.

[0048] The methanol modified additive was prepared as follows:

[0049] S1, adding alkylphenol polyoxypropylene ether amine, dimer acid, dimethyl carbonate and fatty acid methyl ester into a container, stirring evenly to obtain a first mixture;

[0050] S2, stirring the corrosion inhibitor, antioxidant and stabilizer to obtain a second mixture;

[0051] S3, adding the second mixture to the first mixture under stirring at 500-550 r / min, and stirring for another 20 minutes.

[0052] Example 3

[0053] Prepare the raw materials according to the following ratio:

[0054] 7 parts of corrosion inhibitor, 10 parts of dimer acid, 20 parts of alkylphenol polyoxypropylene ether amine, 5 parts of antioxidant, 3 parts of dimethyl carbonate, 8 parts of fatty acid methyl ester, and 1 part of stabilizer.

[0055] Among them, the corrosion inhibitor is benzotriazole, the stabilizer is cyclohexylamine, and the antioxidant is p-tert-butylphenol.

[0056] The methanol modified additive was prepared as follows:

[0057] S1, adding alkylphenol polyoxypropylene ether amine, dimer acid, dimethyl carbonate and fatty acid methyl ester into a container, stirring evenly to obtain a first mixture;

[0058] S2, stirring the corrosion inhibitor, antioxidant and stabilizer to obtain a second mixture;

[0059] S3, adding the second mixture to the first mixture under stirring at 750-800 r / min, and stirring for another 20 minutes.

[0060] Example 4

[0061] Prepare the raw materials according to the following ratio:

[0062] 25 parts of corrosion inhibitor, 20 parts of dimer acid, 50 parts of alkylphenol polyoxypropylene ether amine, 20 parts of antioxidant, 1 part of dimethyl carbonate, 10 parts of fatty acid methyl ester, and 10 parts of stabilizer.

[0063] Among them, the corrosion inhibitor is methyl benzotriazole, the stabilizer is cyclohexylamine, and the antioxidant is p-tert-butylphenol.

[0064] The methanol modified additive was prepared as follows:

[0065] S1, adding alkylphenol polyoxypropylene ether amine, dimer acid, dimethyl carbonate and fatty acid methyl ester into a container, stirring evenly to obtain a first mixture;

[0066] S2, stirring the corrosion inhibitor, antioxidant and stabilizer to obtain a second mixture;

[0067] S3, adding the second mixture to the first mixture under stirring at 750-800 r / min, and stirring for another 20 minutes.

[0068] Example 5

[0069] The difference from Example 1 is that in this example, the corrosion inhibitor is methyl benzotriazole and methyl benzotriazole, and the mass ratio of the two is 1: 1. The remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0070] Example 6

[0071] The difference from Example 1 is that in this example, the corrosion inhibitor is methyl benzotriazole and ammonium benzoate, and the mass ratio of the two is 1: 1. The remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0072] Example 7

[0073] The difference from Example 1 is that in this example, the corrosion inhibitor is ammonium benzoate and methyl benzotriazole, and the mass ratio of the two is 1: 1. The remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0074] Example 8

[0075] The difference from Example 1 is that in this example, the corrosion inhibitor is methyl benzotriazole, methyl benzotriazole and ammonium benzoate, and the mass ratio of the three is 1:1. The remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0076] Example 9

[0077] The difference from Example 1 is that in this example, the stabilizer is zinc peroxide and cyclohexylamine, and the mass ratio of the two is 1: 1. The remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0078] Example 10

[0079] The difference from Example 1 is that in this example, the antioxidant is 2,4-di-tert-butylphenol or p-tert-butylphenol, and the mass ratio of the two is 1: 1. The remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0080] Experimental example

[0081] The modified additives of Examples 1-5 were mixed with methanol fuel at a ratio of 1:10, and the combustion efficiency of the methanol fuel mixed with the modified additives and the pure methanol fuel (comparative example) was tested. The test method was as follows: in a combustion chamber, the methanol fuel sample was subjected to a combustion test, and the heat released during the combustion process was measured using a calorimeter. Combustion efficiency = (actually released heat / theoretical calorific value) × 100%, and the results are shown in Table 1.

[0082] Table 1 Methanol fuel combustion efficiency of Examples 1-5

[0083] Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example Combustion efficiency 98.5％ 99.1％ 98.9％ 97.5％ 98.6％ 87.6％

[0084] It can be concluded from Table 1 that compared with the comparative example (pure methanol), the addition of the modified additives provided in Examples 1-5 can improve the combustion efficiency of methanol.

[0085] In summary, the methanol modified additive provided by the present invention can significantly improve the combustion performance of methanol fuel, reduce pollutant emissions, and extend the service life of the vehicle. The corrosion inhibitor can reduce the corrosion of methanol fuel to the equipment. The dimer acid acts as a lubricant to reduce the direct adhesion between the methanol fuel and the equipment. Dimethyl carbonate and fatty acid methyl ester act as combustion aids to improve the combustion efficiency of methanol fuel.

[0086] The embodiments described above are part of the embodiments of the present invention, rather than all of the embodiments. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A methanol modification additive, characterized in that: The following raw materials are included by weight: 7-30 parts of corrosion inhibitor, 10-30 parts of dimer acid, 20-50 parts of alkylphenol polyoxypropylene ether amine, 5-20 parts of antioxidant, 1-5 parts of dimethyl carbonate, 5-10 parts of fatty acid methyl ester, and 1-10 parts of stabilizer.

2. The methanol modification additive according to claim 1, characterized in that: The following raw materials are included by weight: 20 parts of corrosion inhibitor, 30 parts of dimer acid, 25 parts of alkylphenol polyoxypropylene ether amine, 10 parts of antioxidant, 3 parts of dimethyl carbonate, 8 parts of fatty acid methyl ester, and 5 parts of stabilizer.

3. The methanol modification additive according to claim 1, characterized in that: The following raw materials are included by weight: 30 parts of corrosion inhibitor, 20 parts of dimer acid, 50 parts of alkylphenol polyoxypropylene ether amine, 15 parts of antioxidant, 5 parts of dimethyl carbonate, 5 parts of fatty acid methyl ester, and 10 parts of stabilizer.

4. The methanol modification additive according to any one of claims 1 to 3, characterized in that: The corrosion inhibitor includes a mixture of one or more of benzotriazole, tolutriazole and ammonium benzoate.

5. The methanol modification additive according to any one of claims 1 to 3, characterized in that: The stabilizer is one of zinc peroxide and cyclohexylamine or a mixture of the two.

6. The methanol modification additive according to any one of claims 1 to 3, characterized in that: The antioxidant is 2,4-di-tert-butylphenol or p-tert-butylphenol.

7. A method for preparing the methanol modification additive according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, adding alkylphenol polyoxypropylene ether amine, dimer acid, dimethyl carbonate and fatty acid methyl ester into a container, stirring evenly to obtain a first mixture; S2, stirring the corrosion inhibitor, antioxidant and stabilizer to obtain a second mixture; S3, adding the second mixture to the first mixture under stirring at 500-800 r / min, and stirring for another 10-20 minutes.