Method for producing high-quality gasoline and diesel oil by catalyzing diesel oil

Abstract

The invention discloses a method for producing high-quality gasoline and diesel by catalyzing diesel oil. Oil and circulating hydrogen are mixed into II hydrofining reaction zone for reaction, and the reaction temperature is 30~120°C higher than I hydrofining reaction zone; (3) The resulting oil obtained in step (2) is cut into light components and heavy components; (4) The light components obtained in step (3) are mixed with circulating hydrogen into the hydroreforming reaction zone, and the resulting oil is separated to obtain gasoline fractions and diesel fractions; (5) The heavy components obtained in step (3) are mixed with circulating hydrogen Entering the hydroconversion reaction zone, the generated oil passes through the separation system to obtain gas, gasoline, and diesel fractions. (6) The gasoline obtained in step (4) is mixed with the gasoline obtained in step (5) to obtain a qualified gasoline product. Step ( The diesel oil obtained in 4) is mixed with the diesel oil obtained in step (5) to obtain a qualified diesel product. The method can produce high-quality fuel oil products, and at the same time, compared with other technologies, it has the characteristics of low chemical hydrogen consumption and flexible adjustment of product structure.

Description

technical field [0001] The invention relates to the field of petroleum refining. Specifically, it relates to a method for processing catalytic diesel to produce high-quality gasoline and high-quality diesel. 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 p...

AI Technical Summary

Problems solved by technology

On the basis of systematically grasping the influence of operating conditions such as reaction pressure and reaction temperature on aromatics saturation, two different hydrofining reaction zones are set up to solve the problem of single-ring aromatics selection in the conventional hydrofining process of high-aromatic diesel feedstock sex problem

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