阅读说明：本技术 一种改性甲醇汽油车用燃料及其制备方法 (Modified methanol gasoline vehicle fuel and preparation method thereof ) 是由 郭洪卫 郭勇 郭红广 郭洪山 郭敬雨 蒋书芹 郭慧敏 郭艳敏 杜文龙 于 2020-05-26 设计创作，主要内容包括：本发明公开了一种改性甲醇汽油车用燃料及其制备方法,所述改性甲醇汽油车用燃料的原料包括甲醇50-70％、溶剂油0.5-1％、助溶剂10-15％,其余为汽油,所述助溶剂是由苯胺或其衍生物、C6-C10的烷烃、苯乙烯、苯酚、正戊醇、正辛醇构成。本发明的改性甲醇汽油车用燃料的形态为均匀油相,其燃烧性能远远高于微乳液的甲醇汽油,安全性能相对较高且成本低廉,无需使用表面活性剂,并且普通汽油机无需进行改装即可使用本发明的改性甲醇汽油车用燃料。(The invention discloses a modified methanol gasoline vehicle fuel and a preparation method thereof, wherein the raw materials of the modified methanol gasoline vehicle fuel comprise 50-70% of methanol, 0.5-1% of solvent naphtha, 10-15% of cosolvent and the balance of gasoline, wherein the cosolvent is composed of aniline or derivatives thereof, C6-C10 alkane, styrene, phenol, n-amyl alcohol and n-octyl alcohol. The form of the modified methanol gasoline vehicle fuel is a uniform oil phase, the combustion performance of the modified methanol gasoline vehicle fuel is far higher than that of microemulsion methanol gasoline, the safety performance is relatively higher, the cost is low, a surfactant is not required to be used, and the modified methanol gasoline vehicle fuel can be used by a common gasoline engine without modification.)

1. The modified methanol gasoline vehicle fuel is characterized by comprising the following raw materials in percentage by weight:

50-70 percent of methanol

Solvent oil 0.5-1%

10 to 15 percent of cosolvent

The rest is gasoline,

the cosolvent is composed of aniline or its derivatives, C6-C10 alkane, styrene, phenol, n-pentanol, and n-octanol.

2. The modified methanol gasoline vehicle fuel of claim 1, wherein the gasoline is 90 gasoline^#-97^#Commercial gasoline.

3. The modified methanol gasoline vehicle fuel of claim 1, wherein the aniline derivative is one of p-toluidine and o-toluidine.

4. The modified methanol gasoline vehicle fuel of claim 1, wherein the C6-C10 alkane is at least one of 2, 3-methylbutane, 2-methyl-3-ethylpentane, 2-methyl-3-isopropyl-pentane, n-hexane, n-heptane, and 2, 4-methylpentane.

5. The modified methanol gasoline car fuel of claim 1, wherein the weight ratio of aniline or its derivative, C6-C10 alkane, styrene, phenol, n-pentanol, n-octanol is 1:1-3:5-7:1-3:3-9: 2-5.

6. The method of any one of claims 1 to 5, comprising the steps of:

(1) weighing aniline or its derivatives, C6-C10 alkane, styrene, phenol, n-pentanol, and n-octanol according to a certain proportion, mixing, and stirring for 10-20min to obtain cosolvent;

(2) weighing solvent oil according to a proportion, and pouring the solvent oil into a cosolvent while stirring;

(3) slowly pouring the mixed solution in the step (2) into methanol at low temperature, and stirring for 5-10min at low temperature;

(4) and (4) finally, slowly pouring the mixed raw materials obtained in the step (3) into gasoline while stirring to obtain the modified methanol gasoline.

7. The method for preparing the modified methanol gasoline vehicle fuel as claimed in claim 6, wherein the low temperature in the step (3) is 5-10 ℃.

Technical Field

The invention relates to the technical field of methanol gasoline processing, in particular to a modified methanol gasoline vehicle fuel and a preparation method thereof.

Background

Methanol is a colorless, transparent, flammable and volatile liquid, can be made from coal and coke, and a small amount of methanol is recovered as a byproduct from the dry distillation of wood.

At present, methanol gasoline is prepared by adding part of methanol into gasoline and compounding the methanol gasoline with a methanol fuel cosolvent, and has the characteristics of good thermal efficiency, dynamic property and economy, emission reduction, petroleum saving, safety, convenience and the like. However, methanol has great differences from gasoline in physical and chemical properties, and the differences cause that the content of methanol in the methanol gasoline is relatively low, and the application of the methanol gasoline on automobiles has the following problems:

(1) the number of carbon atoms and hydrogen atoms in methanol molecules is different from that of gasoline, and the methanol molecules contain oxygen atoms, so that compared with the gasoline, the fuel cannot be ignited due to the fact that the concentration of the mixed gas is too lean under the condition of the same engine air inflow;

(2) the latent heat of vaporization of the methanol is 3.6 times that of the gasoline, and the high latent heat of vaporization and the lower vapor pressure cause the difficulty of cold start of the engine;

(3) methanol has swelling effect on non-metal materials such as plastics and rubber, and has corrosiveness on metal materials such as lead, tin, aluminum, copper and iron.

Therefore, the methanol gasoline used on the common gasoline engine needs to increase the fuel injection amount, increase the injection pulse width and replace the equipment or adjust the parameters of the traditional gasoline engine so as to use the methanol gasoline as the replacement fuel.

In patent CN101914396B, a methanol gasoline fuel is disclosed, which is prepared by modifying methanol to combine with a cosolvent and gasoline to obtain a novel fuel without modifying a gasoline engine, and the fuel has good combustion performance, and the addition of modified methanol is improved to a certain extent compared with the existing level. However, the methanol gasoline is in a micro-emulsion form, a large amount of surfactant is required to be used, and the combustion performance of the fuel in the micro-emulsion form is far lower than that of the fuel in a uniform oil phase. The research of the researchers of the invention is to improve the process and the formula to obtain the oil-phase methanol gasoline without modifying the gasoline engine.

Disclosure of Invention

Based on the problems, the invention aims to provide a modified methanol gasoline vehicle fuel, which is in a form of a uniform oil phase, has far higher combustion performance than microemulsion methanol gasoline, relatively higher safety performance and low cost, and does not need to use a surfactant.

The modified methanol gasoline vehicle fuel comprises the following raw materials in percentage by weight:

50-70 percent of methanol

Solvent oil 0.5-1%

10 to 15 percent of cosolvent

The rest is gasoline,

the cosolvent is composed of aniline or its derivatives, C6-C10 alkane, styrene, phenol, n-pentanol, and n-octanol.

Specifically, the gasoline of the invention is 90^#-97^#Commercial gasoline.

Specifically, the aniline derivative of the present invention is one of p-toluidine and o-toluidine.

Specifically, the C6-C10 alkane is at least one of 2, 3-methylbutane, 2-methyl-3-ethylpentane, 2-methyl-3-isopropyl-pentane, n-hexane, n-heptane and 2, 4-methylpentane.

Specifically, the weight ratio of the aniline or the derivative thereof, C6-C10 alkane, styrene, phenol, n-amyl alcohol and n-octyl alcohol is 1:1-3:5-7:1-3:3-9: 2-5.

The preparation method of the modified methanol gasoline vehicle fuel comprises the following steps:

(1) weighing aniline or its derivatives, C6-C10 alkane, styrene, phenol, n-pentanol, and n-octanol according to a certain proportion, mixing, and stirring for 10-20min to obtain cosolvent;

(2) weighing solvent oil, and pouring the solvent oil into a cosolvent while stirring;

(3) slowly pouring the mixed solution in the step (2) into methanol at low temperature, and stirring for 5-10min at low temperature;

(4) and (4) finally, slowly pouring the mixed raw materials obtained in the step (3) into gasoline while stirring to obtain the modified methanol gasoline.

Specifically, the low temperature in step (3) of the present invention is 5 to 10 ℃.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, through adjusting the raw material composition of the methanol gasoline, the raw materials have very good mutual dissolving effect, the stability of the raw materials is improved, and the methanol and the gasoline can be fully dissolved;

the modified methanol gasoline has good corrosion resistance, can form a good protective film with the surface of metal, and effectively avoids the corrosion of the metal;

the modified methanol gasoline vehicle fuel has strong adaptability to the environmental temperature, and can be used in the environment with the temperature of-40 ℃ to 40 ℃;

the modified methanol gasoline vehicle fuel has high combustion rate and thermal efficiency, and greatly reduces oil consumption.

Detailed Description

The present invention will be further described with reference to the following specific examples.