Preparation method and use method of two-stage bed reaction catalyst used in coal tar pitch lightening process

Abstract

The invention relates to a preparation method and use method of a two-stage bed reaction catalyst used in the coal tar pitch hydrocracking lightening process. The use method of the catalyst comprises the following specific steps: the mixture of coal tar pitch and toluene is used as the raw material and a fixed bed reactor is adopted to perform the efficient combinatorial catalysis through the two-stage bed reaction catalyst under the conditions that the reaction temperature is 380-500 DEG C, the reaction pressure is 5.0-12.0MPa and the reaction air speed is 0.2-5h<-1>, thus realizing the lightening process of the hydrocracking two-stage reaction of coal tar pitch. The two-stage bed combined catalyst in the invention consists of two catalytic components with different functions at a ratio of (1:10)-(10:2). By using the method in the invention in the coal tar pitch hydrocracking lightening reaction process, the reaction activity is higher, the stability is better, the production technology can be effectively simplified, and the production energy consumption, the material consumption and the cost can be reduced.

Description

technical field [0001] The invention relates to a preparation method and a use method of a second-stage bed reaction catalyst used in the coal tar pitch hydrocracking lightening process. Specifically, a mixture of coal tar pitch and toluene is used as a raw material, and a fixed-bed reactor is used to realize the hydrocracking lightening reaction of coal tar pitch through the high-efficiency catalytic effect of the combined catalyst of the two-stage bed. When the method is used in the coal tar pitch hydrocracking lightening reaction process, not only the reaction activity is high, the lightening yield is high, but also the production process can be effectively simplified, and the energy consumption, material consumption and cost of production can be reduced. Background technique [0002] my country is a big coal coking country, and coal tar pitch accounts for more than half of the total coal tar. At present, coal tar pitch is mainly used in the production of modified asphal...

AI Technical Summary

Problems solved by technology

[0007] Whether it is the commonly used coal tar pitch processing and utilization method or the relatively mature medium-pressure hydrocracking technology, coal tar pitch hydrocracking has not been effectively realized. Now coal tar pitch hydrogenation technology is difficult to achieve the purpose of deep cracking, only mild cracking Hydrogen, and the existing hydrocatalytic deep cracking technology, coal tar pitch has not been used as raw materials, coupled with the huge resources of coal tar pitch and the broad prospects for application, it is necessary to study the deep coal tar pitch hydrocracking technology, in order to provide subsequent deep processing for various A high value-added aromatic hydrocarbon chemical product, which alleviates the current situation of oil shortage and is beneficial to the clean utilization of coal

Images