A kind of inferior raw material hydrogenation processing method

Abstract

The invention relates to an inferior material hydrotreating method comprising the following steps: deasphalted oil and catalytic cracking oil slurry are mixed, and enter into a hydrodemetallization reaction zone for reaction under the effects of hydrogen and a metal catalyst, a hydrodemetallizated effluent and coker gas oil are mixed, and enter into a first hydrotreating reaction zone for reaction under the effects of the hydrogen and a hydrotreating catalyst, a hydrotreated effluent and one or two of vacuum gas oil and catalytic diesel oil are mixed, and enter into a second hydrotreating reaction zone for reaction under the effects of the hydrogen and the hydrotreating catalyst, and a reaction effluent is separated to obtain t hydrotreated oil. According to the method, an inferior material is segmentally treated, the device operation flexibility and impurity removing effect can be improved, the hydrotreating reaction severity can be reduced, the catalyst deactivation rate can be slowed down, and the device operation cycle can be prolonged.

Description

Technical field [0001] The invention relates to a method for hydrotreating low-quality raw materials, in particular to a method capable of processing multiple low-quality raw materials in stages. Background technique [0002] At present, the nature of crude oil in the world is gradually becoming heavier and worse, coupled with the continuous development of the world economy and increasingly stringent environmental protection regulations, it is necessary to produce a large amount of light and clean fuels. These all require the improvement and improvement of the existing refining technology. Produce products that meet the requirements at the lowest cost. [0003] Catalytic cracking (FCC) still occupies an important position in the processing methods of heavy raw materials to produce light products. The quality of light oil directly produced by catalytic cracking technology is poor, especially the sulfur content of catalytic gasoline is relatively high, catalytic diesel has high sulf...

AI Technical Summary

Problems solved by technology

However, the circulation rate of catalytic cracking heavy cycle oil in this method is limited, generally no more than 20%, and the operating conditions of the wax oil hydrotreating unit are relatively harsh, which cannot guarantee the long-term operation of the unit, and the quality of the produced oil of the hydrotreating unit be affected

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