High-cleanliness modified methanol fuel and preparation method thereof

Abstract

The invention provides a high-cleanness modified methanol fuel, and relates to the field of fuels. The methanol gasoline comprises the following raw materials in percentage by volume: 5-30% of methanol, 30-50% of gasoline, 10-20% of polyol, 0.5-1% of a corrosion inhibitor, 1-5% of a regulator, 1-5% of a swelling inhibitor and 10-20% of aliphatic ether. The methanol fuel provided by the invention comprises the following raw materials: methanol, gasoline, polyol, a corrosion inhibitor, a regulator, a swelling inhibitor and aliphatic ether, the combustion heat value of the gasoline is high, and the combustion heat value of the methanol fuel can be increased by adding a proper amount of gasoline; the corrosion inhibitor can reduce the corrosion of methanol to an engine, and the swelling inhibitor can inhibit the swelling effect of methanol to rubber, plastic and other parts, and reduce the influence of methanol fuel on the engine; the aliphatic ether has polar groups and non-polar groups at the same time, the intersolubility of methanol, gasoline and other raw materials can be improved, and the aliphatic ether contains oxygen atoms, so that the combustion efficiency of methane fuel can be improved, incomplete combustion products in a combustion chamber are reduced, and harmful substances in tail gas emission are reduced.

Description

Technical Field

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

[0002] Methanol fuel is a new type of clean fuel prepared by using industrial methanol or fuel methanol, adding a denaturing alcohol regulator, etc., and then blending with existing national standard gasoline, diesel, etc. in a certain proportion. It is mainly divided into two categories: methanol gasoline and methanol diesel. Among them, methanol gasoline is an important alternative for vehicle fuels, while methanol diesel is mainly used in industrial boilers, stoves and other fields.

[0003] Currently, methanol gasoline fuel mainly has the following problems: (1) Low calorific value. The calorific value of methanol is significantly lower than that of gasoline. The theoretical air-fuel ratio of methanol is 6.45, while that of gasoline is between 14.2 and 15.1. The calorific value generated by methanol combustion is only about 49% of that of gasoline. This results in a lower unit calorific value of methanol gasoline. (2) Difficult cold start. The heat of vaporization required for methanol gasoline to vaporize is about 3.7 times that of gasoline, resulting in poor low-temperature starting performance of methanol fuel. At lower temperatures, methanol gasoline may not be easily evaporated and atomized, leading to difficult cold start. (3) Stability and stratification problems. Methanol gasoline has poor stability and is prone to stratification. This is mainly because there are differences in the physical and chemical properties of some components between methanol and gasoline, resulting in their easy separation under certain conditions. The stratification phenomenon will not only affect the combustion performance of methanol gasoline but also cause damage to the engine. (4) Corrosiveness. Methanol has a swelling and corrosive effect on high-molecular materials such as rubber and plastics. Therefore, methanol gasoline may corrode components such as the fuel supply system, fuel tank, and seals of automobiles during use, thus affecting the normal operation and safety of automobiles. Summary of the Invention

[0004] An object of the present invention is to provide a highly clean modified methanol fuel with good low-temperature stability and low corrosiveness to the engine.

[0005] Another object of the present invention is to provide a preparation method of a highly clean modified methanol fuel. By ultrasonic stirring, step-by-step mixing and multiple stirrings, the raw materials can be fully mixed to improve the uniformity of the methanol fuel.

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

[0007] On the one hand, an embodiment of the present invention provides a highly clean modified methanol fuel, which includes the following raw materials by volume fraction:

[0008] Methanol 5 - 30%, gasoline 30 - 50%, polyol 10 - 20%, corrosion inhibitor 0.5 - 1%, regulator 1 - 5%, swelling inhibitor 1 - 5%, aliphatic ether 10 - 20%.

[0009] In some embodiments of the present invention, the raw materials include the following by volume fraction:

[0010] Methanol 30%, gasoline 45%, polyol 10%, corrosion inhibitor 1%, regulator 1%, swelling inhibitor 2%, aliphatic ether 11%.

[0011] In some embodiments of the present invention, the regulator includes the following raw materials by volume fraction:

[0012] Ethylenediamine 20 - 30%, propylenediamine 20 - 30%, tallow primary amine 40 - 50% and nano - ferrocene 5 - 10%.

[0013] In some embodiments of the present invention, the swelling inhibitor includes the following raw materials by weight parts:

[0014] Diethylene glycol ether 9 - 10 parts, triethylene glycol monobutyl ether 3 - 5 parts, calcium petroleum sulfonate 2 - 5 parts, isopropanol 5 - 8 parts, perfluorobutylethylene 6 - 7 parts.

[0015] In some embodiments of the present invention, the polyol is a C4 - C8 aliphatic diol or triol. For example, one or a mixture of more than one of 1,3 - butanediol, 1,4 - butanediol, trimethylolpropane, 1,5 - pentanediol, 2,2 - dimethyl - 1,3 - propanediol.

[0016] In some embodiments of the present invention, the corrosion inhibitor is benzotriazole.

[0017] In some embodiments of the present invention, the aliphatic ether is one or a mixture of two of methyl ethyl ether and cyclopentyl methyl ether.

[0018] On the other hand, the embodiments of the present invention provide a preparation method of a high - cleanliness modified methanol fuel, which is characterized by including the following steps:

[0019] S1, Mix a part of the polyol and the regulator evenly in a container, heat to 80 - 100 °C, and react for 1.5 - 2 h to obtain a first mixture; ethylenediamine, propylenediamine, and tallow primary amine in the regulator react with the polyol to graft polar groups and non - polar groups onto the polyol molecules, which can form hydrogen bonds with methanol molecules and gasoline molecules, thereby improving the miscibility of methanol and gasoline and enhancing the stability of methanol fuel at low temperatures.

[0020] S2. Mix the corrosion inhibitor and the swelling inhibitor evenly in a container, and perform ultrasonic treatment for 30 - 60 min. Under the action of ultrasonic vibration, the raw material molecules absorb the energy of ultrasonic vibration, the activity of the functional groups increases, and the functional groups of different molecules can interact and penetrate each other, that is, the compatibility of each raw material is improved.

[0021] S3. Then add the first mixture and the remaining raw materials, stir and mix evenly, perform irradiation treatment, and let it stand for defoaming to obtain the methanol fuel. Among them, the power of the proton irradiation treatment is 200 - 300 W, and the irradiation time is 20 - 30 min.

[0022] On the other hand, in the embodiment of the present invention, a highly clean modified methanol fuel is provided. In the step S1, the addition amount of the polyol is 30 - 50% of the total volume of the polyol. A part of the polyol is used to react with the regulator, and the other part of the polyol is mixed with methanol and gasoline in the form of alcohol molecules as a co - solvent to improve the miscibility of methanol and gasoline.

[0023] On the other hand, in the embodiment of the present invention, a highly clean modified methanol fuel is provided. In the step S3, the stirring and mixing evenly includes: stirring at 0.5 - 1 Mpa and 200 - 400 r / min for 10 - 20 min, then increasing the pressure to 2 - 3 Mpa and stirring at 800 - 1000 r / min for 20 - 30 min; reducing the pressure to standard atmospheric pressure and stirring at 200 - 400 r / min for 10 - 20 min.

[0024] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0025] For the methanol fuel provided by the present invention, its raw materials are methanol, gasoline, polyol, corrosion inhibitor, regulator, swelling inhibitor, and aliphatic ether. Gasoline has a high calorific value of combustion. Adding an appropriate amount of gasoline can increase the calorific value of the methanol fuel; the corrosion inhibitor can reduce the corrosion of methanol on the engine, and the swelling inhibitor can inhibit the swelling effect of methanol on components such as rubber and plastic, reducing the impact of the methanol fuel on the engine; the aliphatic ether has both polar groups and non - polar groups, which can improve the miscibility of methanol and gasoline and other raw materials, and the aliphatic ether contains oxygen atoms, which can improve the combustion efficiency of the methane fuel, reduce the incomplete combustion products in the combustion chamber, and reduce the harmful substances in the tail gas emissions.

[0026] The preparation method of the methanol fuel provided by the present invention first involves mixing and reacting a regulator with a part of polyols. Ethylenediamine, propylenediamine, tallow primary amine, etc. in the regulator react with the polyols to introduce polar groups and non-polar groups into the polyol molecules, which can form hydrogen bonds with methanol molecules, reduce the gas resistance of the methanol fuel, improve the compatibility between methanol and gasoline, have good stability at low temperatures, and are not easily stratified. Secondly, the corrosion inhibitor and the swelling inhibitor are subjected to ultrasonic treatment. Under the vibration of ultrasonic waves, the combination between molecules is promoted, and the mutual solubility is improved; after stirring and mixing, irradiation treatment is carried out to activate the molecules, increase the active sites in the raw material molecules, improve the bonding strength between the raw material molecules, and further improve the mutual solubility of methanol and gasoline, and improve the low-temperature stability of the methanol fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic flow chart of the preparation of the methanol fuel in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. For those conditions not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. For reagents or instruments without indicating the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0030] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to specific embodiments.

[0031] The embodiments of the present invention provide a highly clean modified methanol fuel, which includes the following raw materials by volume fraction:

[0032] 5 - 30% of methanol, 30 - 50% of gasoline, 10 - 20% of polyols, 0.5 - 1% of corrosion inhibitor, 1 - 5% of regulator, 1 - 5% of swelling inhibitor, and 10 - 20% of aliphatic ether.

[0033] Preferably, 30% of methanol, 45% of gasoline, 10% of polyols, 1% of corrosion inhibitor, 1% of regulator, 2% of swelling inhibitor, and 11% of aliphatic ether.

[0034] Among them, the regulator includes the following raw materials by volume fraction: 20-30% of ethylenediamine, 20-30% of propylenediamine, 40-50% of tallow primary amine, and 5-10% of nano-ferrocene.

[0035] The swelling inhibitor includes the following raw materials by weight parts: 9-10 parts of diethylene glycol ether, 3-5 parts of triethylene glycol monobutyl ether, 2-5 parts of calcium petroleum sulfonate, 5-8 parts of isopropanol, and 6-7 parts of perfluorobutylethylene.

[0036] The polyol is a C4-C8 aliphatic diol or triol. For example, a mixture of one or more of 1,3-butanediol, 1,4-butanediol, trimethylolpropane, 1,5-pentanediol, 2,2-dimethyl-1,3-propanediol. The corrosion inhibitor is benzotriazole. The aliphatic ether is a mixture of one or two of methyl ethyl ether and cyclopentyl methyl ether.

[0037] The preparation method of the methanol fuel is as follows:

[0038] S1, Mix 30-50% of the total volume of the polyol with the regulator evenly in a container, heat to 80-100 °C, and react for 1.5-2 h to obtain the first mixture;

[0039] S2, Mix the corrosion inhibitor and the swelling inhibitor evenly in a container, and perform ultrasonic treatment for 30-60 min.

[0040] S3, Then add the first mixture and the remaining raw materials, stir at 0.5-1 Mpa and 200-400 r / min for 10-20 min, then increase the pressure to 2-3 Mpa, and stir at 800-1000 r / min for 20-30 min; Reduce the pressure to standard atmospheric pressure, stir at 200-400 r / min for 10-20 min, and then perform irradiation treatment, and let it stand for defoaming to obtain the methanol fuel. Among them, the power of the proton irradiation treatment is 200-300 W, and the irradiation time is 20-30 min.

[0041] The features and properties of the present invention will be further described in detail below in conjunction with the embodiments.

[0042] Example 1

[0043] Prepare the raw materials of the methanol fuel according to the following ratio:

[0044] 30% methanol, 45% gasoline, 10% polyol (1,3-butanediol), 1% benzotriazole, 1% regulator, 2% swelling inhibitor, 11% aliphatic ether (methyl ethyl ether).

[0045] Among them, the regulator is: 30% ethylenediamine, 20% propylenediamine, 40% tallow primary amine, and 10% nano-ferrocene;

[0046] The swelling inhibitor is: 10 parts of diethylene glycol ether, 3 parts of triethylene glycol monobutyl ether, 5 parts of calcium petroleum sulfonate, 8 parts of isopropanol, and 7 parts of perfluorobutylethylene. Mix the raw materials evenly to obtain the swelling inhibitor of this example.

[0047] Prepare the methanol fuel of this example according to the following method:

[0048] S1. Mix 30% of the total amount of polyols with the regulator evenly in a container, heat to 100 °C, and react at this temperature for 2 h to obtain the first mixture.

[0049] S2. Mix the corrosion inhibitor and the swelling inhibitor evenly in a container, and perform ultrasonic treatment (20 KHz) for 40 min.

[0050] S3. Then add the first mixture and the remaining raw materials, stir at 1 Mpa and a rotation speed of 300 r / min for 20 min, then increase the pressure to 3 Mpa, and stir at 1000 r / min for 30 min; reduce the pressure to standard atmospheric pressure, stir at 200 r / min for 10 min, and then perform proton irradiation treatment (power 200 - 300 W, time 20 min), and let it stand for defoaming to obtain the methanol fuel.

[0051] Example 2

[0052] Methanol 25%, gasoline 50%, polyol (1,4 - butanediol) 10%, benzotriazole 0.5%, regulator 2.5%, swelling inhibitor 2%, aliphatic ether 10%.

[0053] Among them, the regulator is: 20% of ethylenediamine, 30% of propylenediamine, 40% of tallow primary amine, and 10% of nano - ferrocene.

[0054] The swelling inhibitor is: 9 parts of diethylene glycol ether, 5 parts of triethylene glycol monobutyl ether, 2 parts of calcium petroleum sulfonate, 5 parts of isopropanol, and 3 parts of perfluorobutylethylene. Mix the raw materials evenly to obtain the swelling inhibitor of this example.

[0055] Prepare the methanol fuel of this example according to the following method:

[0056] S1. Mix 50% of the total amount of polyols with the regulator evenly in a container, heat to 100 °C, and react for 2 h to obtain the first mixture.

[0057] S2. Mix the corrosion inhibitor and the swelling inhibitor evenly in a container, and perform ultrasonic treatment (power 30 HKz) for 40 min.

[0058] S3. Then add the first mixture and the remaining raw materials, stir at 0.5 Mpa and 400 r / min for 20 min, then increase the pressure to 2 Mpa and stir at 800 r / min for 20 min; reduce the pressure to standard atmospheric pressure and stir at 200 r / min for 10 min. Then carry out proton irradiation treatment (power 300 W, time 20 min), and let it stand for degassing to obtain the methanol fuel.

[0059] Example 3

[0060] Methanol 30%, gasoline 30%, polyol (trimethylolpropane) 15%, benzotriazole 1%, regulator 5%, swelling inhibitor 4%, aliphatic ether 15%.

[0061] Among them, the regulator is: ethylenediamine 20%, propylenediamine 25%, tallow primary amine 45% and nano-ferrocene 10%;

[0062] The swelling inhibitor is: 10 parts of diethylene glycol ether, 4 parts of triethylene glycol monobutyl ether, 5 parts of calcium petroleum sulfonate, 8 parts of isopropanol, 6 parts of perfluorobutylethylene. Mix the raw materials evenly to obtain the swelling inhibitor of this example.

[0063] Prepare the methanol fuel of this example by the following method:

[0064] S1. Mix 40% of the total amount of polyol and the regulator evenly in a container, heat to 100 °C and react for 2 h to obtain the first mixture;

[0065] S2. Mix the corrosion inhibitor and the swelling inhibitor evenly in a container and carry out ultrasonic treatment (frequency 30 KHz) for 50 min;

[0066] S3. Then add the first mixture and the remaining raw materials, stir at 1 Mpa and 400 r / min for 20 min, then increase the pressure to 2 Mpa and stir at 1000 r / min for 30 min; reduce the pressure to standard atmospheric pressure and stir at 400 r / min for 20 min. Carry out irradiation treatment (power 200 W, time 20 min), and let it stand for degassing to obtain the methanol fuel.

[0067] Example 4

[0068] Methanol 5%, gasoline 47%, polyol (1,5-pentanediol) 20%, benzotriazole 0.5%, regulator 2.5%, swelling inhibitor 5%, aliphatic ether 20%.

[0069] Among them, the regulator is: ethylenediamine 25%, propylenediamine 20%, tallow primary amine 50% and nano-ferrocene 5%;

[0070] The swelling inhibitor is: 10 parts of diethylene glycol ether, 3 parts of triethylene glycol monobutyl ether, 5 parts of calcium petroleum sulfonate, 8 parts of isopropanol, and 7 parts of perfluorobutylethylene. Mix the raw materials evenly to obtain the swelling inhibitor of this example.

[0071] Prepare the methanol fuel of this example according to the following method:

[0072] S1. Mix 30% of the total amount of polyols with the regulator evenly in a container, heat to 90 °C, and react for 1.5 h to obtain the first mixture.

[0073] S2. Mix the corrosion inhibitor and the swelling inhibitor evenly in a container, and perform ultrasonic treatment (frequency 30 KHz) for 30 - 60 min.

[0074] S3. Then add the first mixture and the remaining raw materials, stir at 1 Mpa and 200 r / min for 10 min, then increase the pressure to 2 Mpa and stir at 1000 r / min for 20 min; reduce the pressure to standard atmospheric pressure and stir at 400 r / min for 10 min. Then carry out proton irradiation treatment (power 300 W, time 20 min), and let it stand for defoaming to obtain the methanol fuel.

[0075] Example 5

[0076] Methanol 22%, gasoline 35%, polyol (a 1:1 mixture of 1,3 - butanediol and 1,4 - butanediol) 20%, benzotriazole 1%, regulator 1%, swelling inhibitor 1%, aliphatic ether 20%.

[0077] Among them, the regulator is: 30% of ethylenediamine, 20% of propylenediamine, 40% of tallow primary amine, and 10% of nano - ferrocene;

[0078] The swelling inhibitor is: 10 parts of diethylene glycol ether, 3 parts of triethylene glycol monobutyl ether, 5 parts of calcium petroleum sulfonate, 8 parts of isopropanol, and 7 parts of perfluorobutylethylene. Mix the raw materials evenly to obtain the swelling inhibitor of this example.

[0079] Prepare the methanol fuel of this example according to the following method:

[0080] S1. Mix 40% of the total amount of polyols with the regulator evenly in a container, heat to 100 °C, and react for 1.5 - 2 h to obtain the first mixture.

[0081] S2. Mix the corrosion inhibitor and the swelling inhibitor evenly in a container, and perform ultrasonic treatment (frequency 30 KHz) for 60 min.

[0082] S3, add the first mixture and the remaining raw materials, stir at 1 Mpa and 400 r / min for 20 min, then increase the pressure to 3 Mpa and stir at 1000 r / min for 30 min; reduce the pressure to standard atmospheric pressure and stir at 400 r / min for 20 min. Perform irradiation treatment (power: 300 W, time: 20 min), let it stand for defoaming, and thus obtain the methanol fuel.

[0083] Example 6

[0084] The difference from Example 1 is that in this example, the polyol is a mixture of 1,3 - butanediol, 1,4 - butanediol, and trimethylolpropane in a volume ratio of 1:1:1. The remaining raw materials and preparation method are the same as those in Example 1.

[0085] Example 7

[0086] The difference from Example 1 is that in this example, the polyol is a mixture of trimethylolpropane and 1,5 - pentanediol in a volume ratio of 1:1. The remaining raw materials and preparation method are the same as those in Example 1.

[0087] Example 8

[0088] The difference from Example 1 is that in this example, the aliphatic ether is a mixture of methyl ethyl ether and cyclopentyl methyl ether in a volume ratio of 1:1. The remaining raw materials and preparation method are the same as those in Example 1.

[0089] Example 9

[0090] The difference from Example 1 is that in this example, the aliphatic ether is a mixture of methyl ethyl ether and cyclopentyl methyl ether in a volume ratio of 2:1. The remaining raw materials and preparation method are the same as those in Example 1.

[0091] Comparative Example 1

[0092] The difference from Example 1 is that the regulator in Example 1 is not added, the addition amount of methanol is 31%, and the remaining raw materials and preparation method are the same as those in Example 1.

[0093] Comparative Example 2

[0094] The difference from Example 1 is that the regulator and aliphatic ether in Example 1 are not added, the addition amount of methanol is 31%, and the addition amount of gasoline is 56%. The remaining raw materials and preparation method are the same as those in Example 1.

[0095] Comparative Example 3

[0096] The difference from Example 1 is that the polyol in Example 1 is not added, the addition amount of methanol is 40%, and the remaining raw materials and preparation method are the same as those in Example 1.

[0097] Comparative Example 4

[0098] It is different from Example 1 in that the operation of step S1 in Example 1 is not carried out, and the remaining raw materials and preparation methods are the same as those in Example 1.

[0099] Experimental Example

[0100] The methanol fuels of Examples 1-5 and Comparative Examples 1-4 were subjected to the following tests, and the results are shown in Tables 1 and 2.

[0101] Table 1 Performance of Methanol Fuels in Examples 1-5

[0102]

[0103] Table 2 Performance of Methanol Fuels in Comparative Examples 1-4

[0104]

[0105]

[0106] It can be concluded from Tables 1 and 2 that the methanol fuels of Examples 1-5 have good stability, high calorific value and good corrosion resistance, meeting the standards of vehicle methanol fuels. In Comparative Example 1, no regulator was added. Compared with Example 1, the methanol fuel in Comparative Example 1 has poor low-temperature stability. Similarly, the low-temperature performance in Comparative Example 2 is also poor, indicating that ethylenediamine, propylenediamine, tallow-based primary amine, etc. in the regulator react with polyols, introducing polar groups and non-polar groups into the polyol molecules, which can form hydrogen bonds with methanol molecules, improve the compatibility of methanol and gasoline, and have good stability at low temperatures and are not easily stratified. In Comparative Example 3, no polyol was added. In Comparative Example 4, the operation of step S1 was not carried out, resulting in poor solubilization effect of the components in the regulator with polyols, poor miscibility of each raw material, poor low-temperature stability and easy stratification.

[0107] In summary, the methanol fuel provided by the present invention uses methanol, gasoline, polyol, corrosion inhibitor, regulator, swelling inhibitor, aliphatic ether as raw materials. The combustion calorific value of gasoline is high. Adding an appropriate amount of gasoline can increase the combustion calorific value of the methanol fuel; the corrosion inhibitor can reduce the corrosion of methanol on the engine, the swelling inhibitor can inhibit the swelling effect of methanol on components such as rubber and plastic, and reduce the impact of the methanol fuel on the engine; the aliphatic ether has both polar groups and non-polar groups, which can improve the miscibility of methanol with gasoline and other raw materials, and the aliphatic ether contains oxygen atoms, which can improve the combustion efficiency of the methane fuel, reduce the incomplete combustion products in the combustion chamber, and reduce the harmful substances in the tail gas emissions.

[0108] The preparation method of the methanol fuel provided by the present invention first involves mixing and reacting a regulator with a part of polyols. Ethylenediamine, propylenediamine, tallow primary amine, etc. in the regulator react with the polyols to introduce polar groups and non-polar groups into the polyol molecules, which can form hydrogen bonds with methanol molecules, reduce the gas resistance of the methanol fuel, improve the compatibility between methanol and gasoline, have good stability at low temperatures, and are not easily stratified. Secondly, the corrosion inhibitor and the swelling inhibitor are subjected to ultrasonic treatment. Under the vibration of ultrasonic waves, the combination between molecules is promoted, and the mutual solubility is improved; after stirring and mixing, irradiation treatment is carried out to activate the molecules, increase the active sites in the raw material molecules, improve the binding strength between the raw material molecules, thereby improving the mutual solubility of methanol and gasoline and the low-temperature stability of the methanol fuel.

[0109] The embodiments described above are some, but not all, of the embodiments of the present invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

Claims

1. A highly clean modified methanol fuel, characterized in that: The following raw materials are included by volume fraction: Methanol 5-30%, gasoline 30-50%, polyol 10-20%, corrosion inhibitor 0.5-1%, regulator 1-5%, swelling inhibitor 1-5%, aliphatic ether 10-20%.

2. The highly clean modified methanol fuel according to claim 1, characterized in that: The following raw materials are included by volume fraction: Methanol 30%, gasoline 45%, polyol 10%, corrosion inhibitor 1%, regulator 1%, swelling inhibitor 2%, aliphatic ether 11%.

3. The highly clean modified methanol fuel according to claim 1, characterized in that: The regulator comprises the following raw materials by volume fraction: Ethylenediamine 20-30%, propylenediamine 20-30%, tallow primary amine 40-50% and nano-ferrocene 5-10%.

4. The highly clean modified methanol fuel according to claim 1, characterized in that: The swelling inhibitor comprises the following raw materials in parts by weight: 9-10 parts of diethylene glycol ether, 3-5 parts of triethylene glycol monobutyl ether, 2-5 parts of calcium petroleum sulfonate, 5-8 parts of isopropanol, and 6-7 parts of perfluorobutylethylene.

5. The highly clean modified methanol fuel according to claim 1, characterized in that: The polyol is an aliphatic C4-C8 dihydric or trihydric alcohol.

6. The highly clean modified methanol fuel according to claim 1, characterized in that: The corrosion inhibitor is benzotriazole.

7. The highly clean modified methanol fuel according to claim 1, characterized in that: The aliphatic ether is one of methyl ethyl ether and cyclopentyl methyl ether or a mixture of the two.

8. A method for preparing a highly clean modified methanol fuel according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, uniformly mixing a portion of the polyol and the regulator in a container, heating to 80-100° C., and reacting for 1.5-2 hours to obtain a first mixture; S2, mix the corrosion inhibitor and swelling inhibitor evenly in a container, and treat with ultrasound for 30-60 minutes. S3, adding the first mixture and the remaining raw materials, stirring and mixing evenly, irradiating, and standing to degas, so as to obtain the methanol fuel.

9. The method for preparing high-clean modified methanol fuel according to claim 8, characterized in that: In the step S1, the amount of polyol added is 30-50% of the total volume of the polyol.

10. The method for preparing high-clean modified methanol fuel according to claim 8, characterized in that: In the step S3, the stirring and mixing comprises: stirring at 0.5-1Mpa and 200-400r / min for 10-20min, then increasing the pressure to 2-3Mpa and stirring at 800-1000r / min for 20-30min; reducing the pressure to standard atmospheric pressure and stirring at 200-400r / min for 10-20min.

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