Additive capable of reducing methanol gasoline saturated vapor pressure

Abstract

The invention relates to an additive capable of reducing methanol gasoline saturated vapor pressure. The additive is characterized in that the additive is prepared by mixing raw materials of, by volume, 50%-100% of fatty alcohol, 0%-38% of ethers and 0%-29% of esters. The saturated vapor pressure of the additive can be reduced by 4-9 units, and distillation range data, especially the distillation volume number at the temperature of 70 DEG C, are closer to those of car gasoline, so that air resistance is effectively prevented, volatilization loss is reduced, and production and usage requirements of methanol gasoline are satisfied.

Description

technical field [0001] The invention relates to an additive for reducing the saturated vapor pressure of methanol gasoline. Background technique [0002] As a new type of clean alternative fuel, methanol gasoline has become the development direction of automobile alternative fuel due to its high octane number, good combustibility, high efficiency and cleanliness. [0003] The saturated vapor pressure of methanol is 32kPa, and the saturated vapor pressure of gasoline is 50-75kPa. When methanol is mixed into gasoline, the saturated vapor pressure of methanol gasoline obtained is obviously higher than that of gasoline. This is mainly because certain hydrocarbons in methanol and gasoline form a low-boiling azeotrope, which increases the volatility of the fuel, increases the vapor pressure, increases the volatilization loss during the production process, and tends to cause air lock when used in summer. , causing the engine to stall. The occurrence of air lock phenomenon serious...

AI Technical Summary

Problems solved by technology

[0007] The invention patent 101948396A published on January 19, 2011 discloses a polyetheramine and its production method and its application in methanol gasoline. The polyetheramine is generally used as a curing agent raw material, which has excessive volatility, toxicity and Disadvantages such as high corrosiveness

The equipment investment and construction cost of this method is high

[0012] Invention patent 101285010B announced on April 27, 2011 discloses "a multifunctional alcohol fuel additive", wherein the vapor pressure inhibitor is ethyl formate and / or ethyl acetoacetate, wherein the price of ethyl acetoacetate is expensive, The density and viscosity are too high, the boiling point is as high as 180.8 ° C, and it will also form a purple complex with iron (III). These factors will affect other physical and chemical properties and storage stability of the product.

In the prior art, the method of increasing equipment for reaction has the defects of high investment and construction costs and device operating costs, and although the method of adding one or more chemical substances can reduce the saturated vapor pressure of methanol gasoline to a certain extent, it is not effective for Less consideration is given to the impact of added substances on the physical and chemical properties and performance of gasoline