Processing method of catalytic diesel oil

Abstract

The invention discloses a processing method of catalytic diesel. Raw materials of the catalytic diesel are cut into light components and heavy components; the light components are subjected to a conversion reaction in a bed layer containing a light aromatic hydrocarbon hydro-conversion catalyst, and converted gasoline and converted diesel are obtained; the heavy components are subjected to a contact reaction with a heavy aromatic hydrocarbon hydro-conversion catalyst, and converted gasoline and diesel fractions are obtained; the diesel fractions obtained through conversion of heavy componentsare subjected to a contact reaction with a heavy aromatic hydrocarbon hydro-conversion catalyst, a reaction effluent is then subjected to a contact reaction with a light component hydro-conversion catalyst; the converted gasoline obtained from each part is mixed, and high-quality gasoline is obtained. Through the reasonable separation and processing process, different types of raw materials can beselectively and independently processed, so that the qualified gasoline product with high octane value can be produced through reasonable utilization of inferior catalytically cracked diesel.

Description

technical field [0001] The invention relates to a processing method of catalytic diesel oil, in particular to a method for processing catalytic cracking diesel oil to produce high-quality gasoline. Background technique [0002] Catalytic cracking is currently the most important secondary processing process in the petroleum refining industry, and it is also the core process of lightening heavy oil. As the world's oil becomes increasingly heavy, the processing capacity of the FCC unit is also continuously improved. Using various heavy oils as raw materials, high-octane gasoline, the main product, is obtained through catalytic cracking reactions, and a large amount of sulfur, nitrogen, and aromatics are produced at the same time. Catalytic diesel oil with high content, low cetane number or cetane index, and extremely poor stability. Moreover, the requirements of environmental protection regulations are becoming more and more stringent, and the indicators of diesel products are...

AI Technical Summary

Problems solved by technology

Although it is possible to process low-quality diesel from catalytic cracking, which increases the processing methods of inferior raw materials and converts them into high-quality products, the proportion of blended catalytic diesel is still limited to a certain extent, and the amount of catalytic diesel that can be processed is very small. Diesel hydrogen consumption is high

[0006] CN103773455A The invention discloses a method for combined hydrogenation of animal and vegetable oils and catalytic diesel oil. Essentially, catalytic diesel oil is processed through hydrogenation and refining. Although catalytic diesel oil can be processed through a suitable raw material ratio, due to the limitation of diesel product indicators , the amount of catalytic diesel that can be blended is very small, which cannot completely solve the problem of processing a large amount of catalytic diesel in large catalytic refineries

Although catalytic diesel components can be processed to produce high-octane gasoline through a certain catalyst gradation, the chemical hydrogen consumption is relatively high, which requires a large amount of hydrogen resources for enterprises

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