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Gas phase-liquid phase mixed hydrogenation method

A technology of liquid-phase hydrogenation and process method, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of the limitation of dissolved hydrogen and achieve the effect of eliminating the effect of steric hindrance

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiency that the existing liquid-phase circulating hydrogenation process is limited by the amount of dissolved hydrogen in the reaction feed, the present invention provides a mixed hydrogenation process of liquid-phase circulating hydrogenation and gas-phase circulating hydrogenation

Method used

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  • Gas phase-liquid phase mixed hydrogenation method

Examples

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Embodiment 1～4

[0030] Embodiment 1~4 adopts the present invention figure 1 process shown. The composition and properties of catalysts used in the following examples are shown in Table 1. The raw materials used in the first reverse gas-phase hydrogenation reaction are the raw materials in Table 2 according to the mixed feedstock oil in the mass ratio of catalyzed wood: coke wood=50:50, and the properties of the straight-run diesel oil in the second reverse liquid-phase hydrogenation reaction are shown in Table 3, wherein the straight-run The mass ratio of diesel oil and first reaction oil is 1: 1, and the process conditions used in Examples 1-4 are listed in Table 4. The evaluation results of Examples 1-4 are shown in Table 5.

[0031] Table 1 The composition and main properties of the catalysts used in the examples.

[0032] project anti-refining agent Second anti-refining agent Chemical composition, wt% MoO 3 20.3 18.2 NiO 6.2 — CoO — 6.5 ...

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Abstract

The invention discloses a gas phase-liquid phase circulating mixed hydrogenation method. The gas phase-liquid phase circulating mixed hydrogenation method comprises following steps: inferior diesel oil is subjected to gas phase counter current hydrogenation reaction; obtained liquid oil is mixed with straight-run diesel oil, and an obtained mixture is subjected to saturated hydrogen dissolving, and then is delivered into a liquid phase circulating hydrogenation reactor for reaction; and then a low-sulfur diesel oil product is obtained. According to the gas phase-liquid phase circulating mixed hydrogenation method, after gas phase hydrogenation reaction, aromatic hydrocarbons of the inferior diesel oil are saturated, hydrogen consumption of further reactions is relatively low, and saturated dissolved hydrogen content is increased; at the same time, a large amount of hydrogen, which is not reacted, is dissolved in the obtained liquid oil, enough dissolved hydrogen is provided for deep desulphurization reaction in the liquid phase circulating hydrogenation reactor, two-reverse charging properties are optimized, and it is beneficial for performing of deep hydrodesulfurization reaction. The invention provides the novel method used for producing ultra-low sulphur diesel oil by taking inferior diesel oil and straight-run diesel oil as raw materials.

Description

technical field [0001] The present invention relates to a hydrogenation treatment process for hydrocarbons, specifically a hydrogenation process that combines gas-phase circulation hydrogenation and liquid-phase circulation hydrogenation to process low-quality diesel and straight-run diesel to produce ultra-low sulfur diesel products Hydrogenation process method. 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 deep desulfurization technology 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 hydrog...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 柳伟宋永一刘继华李扬牛世坤李士才徐大海丁贺赵桂芳
Owner CHINA PETROLEUM & CHEM CORP
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