Method for preparing gasoline by using naphtha and methanol

Abstract

The invention relates to the technical field of oil product processing, and particularly relates to a method for preparing gasoline by using naphtha and methanol. According to the method, naphtha and methanol serving as raw materials in a weight ratio of (4-5):1 react with a molecular sieve catalyst at the temperature of 200-500 DEG C, the pressure of 0.1-5.0MPa and a raw material weight space velocity of 0.1-10h<-1>. By adopting the preparation method, circulating air is not adopted for temperature control in a reaction system, and the reaction equipment is simple; saturated alkane, especially straight-chain paraffin, is the ingredient of naphtha, can perform alkylation reaction with methanol under the reaction condition of the method, so that the carbon chain is prolonged, and heavy petroleum ether is realized to become a qualified gasoline component.

Description

technical field

[0001] The invention relates to the technical field of oil product processing, in particular to a method for preparing gasoline by using naphtha and methanol as raw materials. Background technique

[0002] The conversion of methanol to gasoline is a strong exothermic reaction. The temperature of the reactor is high and difficult to control. If the released heat cannot be removed from the reactor well, it will cause overheating, resulting in faster carbon deposition of the catalyst, short service life, and short overall life. long and high yield of heavy oil. Therefore, in the reaction system, it is necessary to use the circulating gas which is several times larger than the feed methanol as a cooling or heating medium for temperature control. Seriously affect the stability of the reaction product and the service life of the catalyst, shorten the regeneration period of the catalyst, and the process and equipment are complex, energy consumption is high, and inv...

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