A kind of gas phase and liquid phase combined hydrogenation process method

A process method and liquid-phase hydrogenation technology, which can be used in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., and can solve problems such as the limitation of dissolved hydrogen

Active Publication Date: 2015-08-12
CHINA PETROLEUM & CHEM CORP +1
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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 combined process method of liquid-phase circulating hydrogenation and gas-phase circulating hydrogenation

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  • A kind of gas phase and liquid phase combined hydrogenation process method

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Embodiment 1～4

[0024] Embodiment 1~4 adopts the present invention figure 1 The process flow shown. The composition and properties of catalysts used in the following examples are shown in Table 1. The raw materials used in the first inverse gas-phase hydrogenation unit are the raw materials in Table 2. According to the ratio of catalyzed diesel: coke diesel = 1:1, the raw material oil is mixed. The ratio of diesel oil to the effluent oil of an anti-high fraction 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.

[0025] Table 1 The composition and main properties of the catalysts used in the examples.

[0026] project anti-refining agent Second anti-refining agent Chemical composition, wt% MoO 3 20.3 18.2 NiO 6.2 — CoO — 6.5 carrier Silicon-containing alumina Silicon-containing alumina

[0027] Table 2 Raw oil properties.

[0028] p...

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Abstract

The invention discloses a gas phase-liquid phase circulating combined hydrogenation method. The gas phase-liquid phase circulating combined hydrogenation method comprises following steps: inferior diesel oil is subjected to gas phase hydrogenation reaction; a reaction effluent is delivered into a hot high pressure separator for separation, a liquid product is mixed with straight-run diesel oil, and an obtained mixture is delivered into a hydrogen mixing tank for 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 combined 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; and at the same time, a large amount of hydrogen, which is not reacted, is dissolved in the obtained liquid phase effluent, 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 invention relates to a hydrocarbon hydrogenation treatment process, in particular to a combined hydrogenation process of gas phase circulation hydrogenation and liquid phase circulation hydrogenation. 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 hydrogenation and two-stage hydrogenation. In addition, as the cost control of refineries is becoming more and more stringent, the liquid phase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 柳伟刘继华李扬宋永一牛世坤李士才徐大海丁贺赵桂芳
Owner CHINA PETROLEUM & CHEM CORP
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