Diesel hydrogenation method

A technology of diesel oil and process method, which is applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problem of high content of hydrogen sulfide, and achieve the effect of improving the quality of raw materials

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the high content of hydrogen sulfide in the liquid phase of the existing liquid phase circulation hydrogenation technology affects the progress of the desulfurization reaction, the invention provides an improved diesel hydrogenation process

Method used

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Embodiment 1～4

[0024] Adopt flow process of the present invention such as figure 1 . Nickel-tungsten-molybdenum type hydrorefining catalyst is used in the following examples. The composition and properties of the catalyst are shown in Table 1. The properties of the raw materials used are shown in Table 2. The process conditions used in Examples 1-4 are listed in Table 3. Examples 1-4 The evaluation results of 4 can be seen in Table 4.

[0025] Composition and main properties of the catalyst used in the embodiment of table 1

[0026] project

Catalyst A

Catalyst B

Chemical composition, mass%

MoO 3

6.2

19.8

NiO

12.3

-

CoO

-

3.7

WO 3

15.2

-

carrier

Aluminum oxide

Aluminum oxide

Physical and chemical properties

Pore ​​volume, ml / g

0.45

0.41

Specific surface area, m 2 / g

265

206

[0027] Table 2 Raw Oil Properties

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Abstract

The invention discloses a diesel hydrogenation method, which comprises: reacting a diesel raw material in a conventional liquid-phase circulating hydrogenation reactor, and subjecting the efflux to gas-liquid separation; after hydrogen dissolved in a liquid phase is saturated, delivering the liquid phase to a liquid phase circulating hydrogenation reactor for reaction; and after liquid-phase circulating oil passes through a hydrogen sulfide removal reactor, circulating the liquid-phase circulating oil to the entrance of a liquid phase hydrogenation reactor. In the method, the raw material oil is pretreated by gas-phase circulating hydrogenation, the sulfur content in the generated oil is reduced to 500 mu g/g; and after a liquid-phase hydrogenation reaction, the hydrogen sulfide removal content in the circulating oil is reduced; and after hydrogen sulfide is removed from the circulating oil by absorption, the hydrogen sulfide content can be reduced to below 100 mu g/g, a sulfur-containing environment required by a catalyst is maintained, the activity of the catalyst is not inhibited, and thus, smooth deep removal of aromatics and deep desulfuration reaction in the liquid-phase hydrogenation reactor are promoted.

Description

technical field [0001] The invention relates to a process for hydrogenation treatment of hydrocarbons, in particular to an improved method for liquid-phase circulation hydrogenation technology of diesel oil. 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] In conventional hydroprocessing, hydrogen is converted from a vapor phase to a liquid phase, where it can react with impurities such as sulfur-containing compounds in petroleum hydrocarbons on the surface of a catalyst. This is achieved by using very large quantities of hydrogen and oil circulated through the catalyst bed. The oil and hydrogen pass through the catalyst bed, and the hydrogen is absorbed into the thi...

Claims

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Application Information

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