A composition for engine low-alcohol gasoline additive and its preparation method

Abstract

The invention belongs to the field of methanol gasoline additives, and particularly relates to a composition for low-alcohol gasoline additives for engines and a method for preparing the composition.The composition for the additives comprises, by weight, 21% of modifiers A, 36-45% of modifiers B, 3% of nanometer combustion improvers and the balance acetone. Stirring tanks are vacuumized and are heated until the temperatures of the stirring tanks reach 30-35 DEG C, then ethylene glycol monomethyl ether and glycerin are mixed with each other and are centrifugally stirred for 8-20 min to obtainthe modifiers A, the centrifugal stirring numbers of turns are 1500 r / min, and a mass ratio of the ethylene glycol monomethyl ether to the glycerin is 1:6; stirring tanks are vacuumized and are heateduntil the temperatures of the stirring tanks reach 30-35 DEG C, then bis-dimethylamino ethyl ether and n-decyl alcohol are mixed with each other and are centrifugally stirred for 8-20 min to obtain the modifiers B, the centrifugal stirring numbers of turns are 1500 r / min, and a mass ratio of the bis-dimethylamino ethyl ether to the n-decyl alcohol is 1:8-1:5. The composition and the method have the advantage that the problems of difficulty in starting under the low-temperature conditions, unclean and non-environment-friendly tail gas and high noise can be solved by the aid of the compositionand the method.

Description

technical field [0001] The invention belongs to the field of methanol gasoline additives, in particular to a composition used as an engine low-alcohol gasoline additive and a preparation method thereof. Background technique [0002] Due to the short-term irreversible properties of biofuels, the development of energy-saving automotive fuels has become a direction that various manufacturers and research institutions are rushing to invest in research and development, such as PCT / US2006 / 044789. Among them, methanol, which is used as a vehicle fuel, has received a lot of attention. Since methanol does not contain benzene, aromatics and olefins, its combustion products are mainly water and carbon dioxide. Therefore, the conventional exhaust gas is much lower than that of carbon monoxide and hydrocarbons. It is better than gasoline and diesel and has no black smoke. It is a typical clean alternative fuel. [0003] However, there are many problems in the existing methanol fuel that...

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Problems solved by technology

[0004] First, the vapor pressure of methanol is lower than that of gasoline, which will seriously affect the power performance of the car, especially in severe cold and low temperature conditions, which will cause difficulty in starting the engine. Some existing technologies solve the problem of compatibility between methanol and gasoline by emulsifying with a large amount of dispersant For example, CN200610105014.5 discloses a car methanol gasoline cleaning standard-increasing emulsifier, which specifically discloses that the emulsifier is n-octanol, n-heptanol, isopropanol, n-butanol, n-decyl alcohol, decanol Hexaol and Span 80 are put into a reactor according to a certain weight percentage and stirred and mixed under certain conditions

[0005] Second, when methanol is not fully burned, it is easy to produce harmful substances such as formaldehyde, which will pollute people and the environment

However, in the prior art, there is not only the detection of formaldehyde by mixed fuels, such as a capillary column gas chromatography method for detecting formaldehyde in methanol gasoline fuel tail gas disclosed in CN201610018982.6, but also methanol and formaldehyde are used as raw materials in order to enhance the modification conditions fuel, such as a kind of vehicle mixed fuel disclosed in CN201210519942.1, but this method of using formaldehyde in methanol mixed fuel is extremely undesirable

[0006] Third, due to the large capacity of methanol gasoline combustion and sufficient concentrated heat release, when using mixed alcohol gasoline, when the fuel supply system of the engine uses this fuel, the combustion noise will be louder than pure gasoline combustion, and the noise reduction It has also become a problem that plagues automobile fuel in the city

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