Hydrogenation technology for diesel

Abstract

The invention discloses a hydrogenation technology for diesel, comprising the following steps: distilling a diesel raw material into light components and heavy components; under the hydrogenation refined condition, carrying out hydrorefining reaction on the heavy components in a first reaction region; mixing effluents at the first reaction region with the light components to enter a second reaction region for the hydrorefining reaction; and carrying out separation treatment on the effluents in the second reaction region. Compared with the prior art, by the technology in the invention, released reaction heat is effectively utilized in the hydrorefining process of the diesel raw material, a great amount of cold hydrogen is not used, and the negative influence of nitrogenous compounds and nuclei aromatics in the heavy components on deep desulfuration reaction of the diesel is overcome; and simultaneously, the technology is simple, energy consumption is reduced, and ultra low sulfur diesel products can be manufactured by using the technology.

Description

technical field [0001] The invention relates to a process for hydrogenation treatment of hydrocarbons, in particular to a process for hydrogenation desulfurization and dearomatization of gas, liquid and solid three-phase diesel fractions. Background technique [0002] With the improvement of people's awareness of environmental protection and the increasingly stringent environmental regulations, the production and use of clean vehicle fuels has increasingly become a development trend. As for the cleanliness of diesel oil, desulfurization and dearomatization are the key to cleanliness. [0003] At present, in the desulfurization and dearomatization technologies of diesel oil, hydrotreating technology is still the main and most effective technical means. There are also various hydroprocessing technologies, such as single-stage hydrogenation, single-stage series hydrogenation and two-stage hydrogenation. Each of these technologies has its own advantages and disadvantages. For ...

AI Technical Summary

Problems solved by technology

[0007] In view of the large temperature rise of the first reaction bed of the reactor in the existing single-stage hydrogenation process technology, a large amount of cold hydrogen is required, and the nitrogen-containing compounds and condensed ring aromatics in the heavy components of diesel oil affect the desulfurization reaction rate of diesel oil insufficiently. The present invention provides a An improved two-bed hydrogenation process technology, the process is simple, energy consumption is reduced, and ultra-low sulfur diesel can be produced at the same time

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