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Combined hydrogenation process for diesel oil

A process method and diesel technology are applied in the field of dearomatization combined process and hydrodesulfurization of diesel fractions to achieve the effects of improving product color, low hydrogen consumption and product color improvement.

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the existing hydrorefining reaction process, the present invention provides an improved hydrodesulfurization and dearomatization process that is used together in gas phase cycle hydrogenation and liquid phase cycle hydrogenation

Method used

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  • Combined hydrogenation process for diesel oil
  • Combined hydrogenation process for diesel oil
  • Combined hydrogenation process for diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0028] Embodiment 1~2 adopts figure 1 Shown technological process, embodiment 3~4 adopts figure 2 Process flow shown.

[0029] The composition and properties of the catalysts used in the examples are shown in Table 1. Catalyst A was used in the liquid phase hydrogenation reactor, and catalyst B was used in the gas phase circulation hydrogenation reactor.

[0030] The properties of the raw materials used are listed in Table 2. The cut temperature for the light and heavy fractions was 290 °C.

[0031] The process conditions used in Examples 1-4 are listed in Table 3. The evaluation results of Examples 1-4 are shown in Table 4.

[0032] Composition and main properties of the catalyst used in the embodiment of table 1

[0033] project

Catalyst A

Catalyst B

Chemical composition, mass%

MoO 3

19.8

6.2

NiO

-

12.3

CoO

3.7

-

WO 3

-

15.2

carrier

Aluminum oxide

...

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Abstract

The invention discloses a combined hydrogenation process for diesel oil. The method comprises the following steps: 1, separating a diesel oil raw material into light components and heavy components; 2, allowing the light components to enter a liquid phase hydrogenation reactor for reaction; 3, allowing the heavy components to enter a gas phase cycle hydrogenation reactor for reaction; and 4, separating obtained gas phase hydrogenation products (or the gas phase hydrogenation products and obtained liquid phase hydrogenation products) to obtain a liquid which can be treated as a product directly discharged from the gas phase cycle hydrogenation reactor, or allowing the obtained liquid to cycle to the liquid phase hydrogenation reactor when the liquid phase hydrogenation products are treated as a product discharged from the liquid phase hydrogenation reactor. The method of the invention, which allows the light components and the heavy components to be fractionated through separating the raw material, and the gas phase cycle hydrogenation and the liquid phase hydrogenation to be respectively carried out, fully utilizes respective characteristics of above two hydrogenation technologies; and the method of the invention avoids a dissolved hydrogen sulfide accumulation problem caused by the liquid phase cycle in present liquid phase hydrogenation technologies and weakens the inhibition effect of hydrogen sulfide to above reactions, so the hydrodesulfurization reaction efficiency is improved.

Description

technical field [0001] The invention relates to a process for hydrogenation treatment of hydrocarbons, in particular to a combined process for hydrogenation desulfurization and dearomatization of 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, which can be divided into single-stage hydrogenation, single-stage series hydrogenation and two-stage hydrogenation according to the reaction process. According to whether the reaction system is ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 柳伟
Owner CHINA PETROLEUM & CHEM CORP
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