A kind of high-octane gasoline production method

Abstract

The present invention discloses a high octane number gasoline production method, which is used for processing catalytic diesel fuel so as to produce the high octane number gasoline distillate, wherein the process mainly adopts a reaction distillation tower and a hydrogen circulation system, the stripping section of the reaction distillation tower adopts a hydrocracking catalyst as a filler, the rectification section is provided with the rectification tower plate, the tower plate is provided with an isomerization catalyst, the tower bottom oil is circulated to the material inlet of the tower, a hydrogen circulation heating furnace is arranged, the heated hydrogen gas enters the bottom portion of the tower, the gasoline distillate is obtained from the top of the tower, and a small amount (less than 2%) of the diesel fuel distillate is periodically discharged from the bottom of the tower. According to the method of the present invention, the characteristics of the hydrocracking and the reaction distillation process are completely utilized, such that the secondary cracking reaction of the light distillate is reduced, the liquid yield is increased, and the gasoline distillate yield is more than 90%. With the method of the present invention, the catalytic diesel fuel is completely catalyzed, the octane number of the produced is high, and compared with the conventional hydrogenation process, the method of the present invention has characteristics of simple process and energy saving.

Description

technical field

[0001] The invention relates to a catalytic distillation method, in particular to a hydrocracking method capable of effectively treating inferior catalytic cracked diesel oil. Background technique

[0002] Crude oil is becoming increasingly heavy and inferior, the market demand for heavy oil is decreasing, the demand for light oil is increasing, and the degree of deep conversion of heavy residual oil is continuously increasing. Catalytic cracking is one of the important means in the lightening of many heavy oils. However, the properties of the products obtained by catalytic cracking are generally poor, and further processing is required to obtain qualified products. The diesel fraction obtained from catalytic cracking generally has the characteristics of high aromatics content, low cetane number, high sulfur and nitrogen content, and it is difficult to directly use it as a product, and it is difficult to effectively improve its product quality by ordinary pr...

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