Method for preparing gasoline from methanol

Abstract

The invention relates to a method for preparing gasoline from methanol and light petroleum distillates, and aims to mainly solve the problems that light petroleum distillates are unable or hard to be used to prepare gasoline, and during gasoline preparation process, without transforming an engine, methanol has a low incorporation amount and is easy to corrode equipment as well as result carbon deposition in the prior art. The method of the invention adopts a technical scheme consisting of: taking methanol or dimethyl ether and light petroleum distillates as the raw materials, and under the conditions of a reaction temperature of 300-500DEG C, a reaction pressure ranging from normal pressure to 10.0MPa, and a raw material weight hourly space velocity of 0.3-10h<-1>, contacting the raw materials with a solid acid catalyst, and making the methanol and the light petroleum distillates undergo an alkylation reaction on the catalyst so as to obtain a gasoline product with the weight concentration of oxygen-containing compounds less than 100ppm. The technical scheme of the invention well solves the problem, and can be used in the industrial production of gasoline.

Description

technical field [0001] The invention relates to a method for preparing gasoline from methanol and light petroleum fractions. Background technique [0002] Gasoline is a large category of oil products. It is composed of complex hydrocarbons with about 5 to 12 carbon atoms. It is flammable and is mainly used as fuel for vehicle engines. In the prior art, gasoline is generally produced by petroleum fractionation or heavy fraction cracking. Due to limited oil resources and declining reserves, many oil fields have entered the late stage of exploitation, and the cost of exploitation has risen, resulting in tight supply of gasoline and high prices. [0003] In the process of petroleum refining, a large number of light petroleum fractions with carbon atoms of 1 to 12 will be produced. A small amount of these light petroleum fractions are obtained directly from petroleum distillation, and most of them are the products of cracking reactions. Among these light petroleum fractions, C1...

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is that the light petroleum distillate existing in the prior art cannot or is difficult to be made into gasoline and in the process of making gasoline, the mixing amount of methanol is relatively low under the condition of not remodeling the engine, which is easy to corrode equipment and carbon deposits. To solve the problem, provide a new gasoline production method, which has light petroleum fractions that can be better utilized, without the need to modify the existing engine, the proportion of methanol in the production raw materials is high, and there is no need to add surface Activator, high calorific value of gasoline products