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Residual oil hydrodemetallization method

A technology of hydrodemetallization and residual oil hydrogenation, which is applied in the fields of hydroprocessing, petroleum industry, and hydrocarbon oil treatment, and can solve the problems of complex process, difficult industrialization, and high viscosity

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method processes ethylene tar separately. Due to the high density and high viscosity of the heavy fraction, the requirements for the hydrogenation unit and supporting equipment are increased, and another fractionation tower is required to cut the ethylene tar, and the processing of the heavy fraction requires a large amount of hydrogenation. Transformation to generate oil cycle, the process is complicated, and it is difficult to realize industrialization

Method used

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  • Residual oil hydrodemetallization method
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  • Residual oil hydrodemetallization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The method of this example is basically the same as that of Comparative Example 1, except that ethylene tar A is used to replace part of the residue raw material A (see Table 3) and part of the hydrogenation protecting agent is used to replace part of the hydrodemetallization catalyst (see Table 2). . Among them, the process conditions are shown in Table 3, and the fixed-bed hydrogenation results are shown in Table 4. At different operating times, the viscosity of hydrogenation effluent, the removal rate of metal Ni and V, and the removal rate of sulfur are shown in Figure 1-3 .

Embodiment 2

[0057] This example is basically the same as Example 1, except that the feedstock of this example uses residual oil raw material B, ethylene tar B, heavy cycle oil and different catalyst gradation methods. The process conditions are shown in Table 3, and the catalyst gradation is shown in Table 3. Table 2, the fixed bed hydrogenation results are shown in Table 4.

Embodiment 3

[0059]This example is basically the same as Example 1, the difference is that the feedstock of this example uses residual oil raw material A and ethylene tar B and different catalyst gradation methods, the process conditions are shown in Table 3, and the catalyst gradation is shown in Table 2. The bed hydrogenation results are shown in Table 4.

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Abstract

The invention discloses a residual oil hydrodemetallization method. According to the method, raw materials comprise a residual oil raw material, hydrogen and a material viscosity adjusting auxiliary agent, wherein the material viscosity adjusting auxiliary agent comprises ethylene tar, and the fed materials are subjected to a hydrotreatment reaction in a hydrodemetallization reaction zone to obtain a hydrogenation effluent; and the hydrodemetallization reaction zone is filled with at least one hydrodemetallization catalyst and at least one hydrogenation protective agent. According to the method disclosed by the invention, the ethylene tar is added into the residual oil raw material as a material viscosity adjusting aid, so that the system viscosity under the reaction condition can be effectively reduced, the hydrodemetallization of the residual oil is promoted, and the improvement of the reaction performances such as subsequent desulfurization, and carbon residue removal and the like is facilitated through the synergistic effect of all the components under the hydrodemetallization reaction condition.

Description

technical field [0001] The invention relates to a hydrocarbon hydrogenation treatment technology, in particular to a residual oil hydrogenation demetallization method. Background technique [0002] Residual oil hydrogenation technology is under the conditions of high temperature, high pressure and the presence of a catalyst, the residual oil and hydrogen are catalytically reacted to remove harmful impurities such as sulfur, nitrogen and metals in the residual oil molecules. At the same time, some of the larger residual oil Molecules are split and hydrogenated into smaller desired components. [0003] Compared with other residual oil processing technologies, fixed-bed hydroprocessing technology has low investment and operating costs, safe and simple operation, and is by far the most industrially applied and most mature residual oil processing technology. The fixed-bed residual oil hydrotreating unit can provide qualified feed to the catalytic cracking unit, and at the same t...

Claims

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Application Information

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IPC IPC(8): C10G45/04C10G65/02
CPCC10G45/04C10G65/02C10G2300/205C10G2300/80
Inventor 李洪广耿新国刘铁斌翁延博金建辉蒋立敬袁胜华
Owner CHINA PETROLEUM & CHEM CORP
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