Gasoline composition and preparation method thereof

Abstract

The invention provides a gasoline composition and a preparation method thereof. The gasoline composition comprises 70-99wt% of raw gasoline and 1-30wt% of sec-butyl acetate measured as the total weight of the gasoline composition, with good anti-knock property, green and environmental protection and low cost. The raw materials used in the preparation method have strong adaptability and good broadspectrum activity, and are simple and easy to do. By comparing the gasoline composition obtained by adding 9.8wt% of sec-butyl acetate in catalytic gasoline with the catalytic gasoline used as raw gasoline, the research octane number (RON) increases to 93.0 from 90.4, the motor octane number (MON) increases to 83.6 from 81.4, the anti-knock index increases to 88.3 from 85.9, the induction period is longer than 600min, the content of the existent gum is only 2.77mg / 100ml, and other indexes all meet the prescribed standards of Stage III.

Description

technical field [0001] The invention relates to a gasoline composition and a preparation method thereof, in particular to a high-octane gasoline composition and a preparation method thereof. Background technique [0002] The traditional additive components to increase the octane number of gasoline are mainly leaded compounds, but due to the serious pollution of the environment caused by leaded compounds, the country has explicitly banned the production of leaded gasoline. The octane rating of gasoline can now be increased by adding aromatics, oxygenates or methylcyclopentadiene manganese tricarbonyl (MMT) to gasoline. [0003] The commonly used oxygen-containing compounds mainly include ether compounds and alcohol compounds, wherein the ether compounds include methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE) and tert-amyl methyl ether (TAME). MTBE is the most commonly used in the above-mentioned ether compounds, but MTBE has the following disadvantages: the one...

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Problems solved by technology

MTBE is the most commonly used in the above-mentioned ether compounds, but MTBE has the following disadvantages: the one is that the solubility of MTBE in water is about 4.2% by weight, and MTBE has an unpleasant smell. When the content in water exceeds 40-95pg / L , it will make the water produce an unpleasant smell; second, MTBE is difficult to biodegrade, so once the gasoline mixed with MTBE leaks, MTBE will remain in the environment for a long time

And, although CN1513954A also specifically discloses the production of gasoline engine fuel, No. 70 gasoline of 50 parts by weight, wood essence of 30 parts by weight, No. 120 solvent oil of 20 parts by weight can be mixed with 0.45 parts of E group comprehensive additives, but The specific performance index of the gasoline engine fuel prepared is not disclosed

[0013] The main problem of the disclosed fuel additive of CN1513954A is: the composition of fuel additive is many, therefore, preparation process is complicated, and cost is too high; Higher, which is not conducive to reducing the olefin content of gasoline, so it is not environmentally friendly

Although EP0905217A specifically discloses that the oxygen-containing compound can be an ester compound, its examples only disclose gasoline containing methyl tert-butyl ether, tert-amyl ethyl ether and methoxypropyl acetate, respectively. , and the octane number of the disclosed gasoline containing methyl tert-butyl ether, tert-amyl ethyl ether and methoxypropyl acetate, respectively, did not increase significantly

[0015] GB2114596A discloses a fuel composition containing 3-50% by volume of tert-butyl acetate; and specifically discloses a fuel composition containing 90% by volume of gasoline and 10% by volume of tert-butyl acetate, the The octane number of the research method and the octane number of the motor method of the fuel composition are all improved compared with the raw gasoline, but tert-butyl acetate is a high-grade chemical intermediate product, the price is relatively expensive, and it is not used as an additive component of gasoline. Uneconomical

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