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Method for removing metal impurities in residual oil through hydrogenation

A hydrodemetallization and demetallization technology, applied in hydrotreating process, refining to remove heteroatoms, petroleum industry, etc., can solve the problems of high viscosity, complex process, high density of heavy fractions, etc.

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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  • Method for removing metal impurities in residual oil through hydrogenation
  • Method for removing metal impurities in residual oil through hydrogenation
  • Method for removing metal impurities in residual oil through hydrogenation

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preparation example Construction

[0064] In the method for removing metal impurities in residual oil by hydrogenation of the present invention, the preparation method of the first hydrodemetallization catalyst can be prepared by a conventional method, preferably by the following method, specifically including:

[0065] (1) Dry the woody raw material and crush it into sawdust;

[0066] (2) Selectively adding hydrogenation active metal components to the sawdust and pseudo-boehmite obtained in step (1), kneading and extruding;

[0067] (3) Perform microwave pretreatment on the molded product obtained in step (2) at 200~350°C, the pretreatment time is 0.5~5.0h, and the microwave power is 1~6kW; The temperature is 400~600℃, and the carbonization time is 0.5~8.0h;

[0068] (4) Activate the material after carbonization in step (3) at 500-800°C for 1-5 hours at high temperature, the activation atmosphere is an alkaline gas atmosphere, and after activation, selectively introduce hydrogenation active metal components t...

Embodiment 1

[0079] The sawdust was dried at 140°C for 5 hours and crushed into 200-mesh sawdust; the sawdust was mixed with pseudoboehmite with a particle size of 110 μm in 2 o 3 Mix according to the mass ratio of 3:7, and add 5wt% acetic acid, 3wt% kale powder and a solution containing active metal components molybdenum and nickel, knead, and then extrude; the extrudate is microwaved at 250 ° C Pretreatment for 1 hour with a microwave power of 2kW, followed by carbonization for 3 hours in an inert gas atmosphere at a carbonization temperature of 450°C; the carbonized carrier was activated at a high temperature at 700°C, and the activation atmosphere contained ammonia water with a volume fraction of 5% Steam, activation time 3h, prepared the first hydrodemetallization catalyst A of the present invention, the properties of the catalyst are shown in Table 1.

Embodiment 2

[0081] Compared with Example 1, the difference is that the sawdust was dried at 110°C for 7 hours, crushed into 250 mesh wood chips, the microwave pretreatment temperature was 300°C, the microwave power was 4kW, and the activation atmosphere contained 15% ammonia water vapor by volume fraction , the activation time was 2h, and the others were the same as in Example 1 to prepare the first hydrodemetallization catalyst B of the present invention. The properties of the catalyst are shown in Table 1.

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Abstract

The invention discloses a method for removing metal impurities in residual oil through hydrogenation. According to the method, fed materials comprise a residual oil raw material, hydrogen and a material viscosity adjusting auxiliary agent, 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; the hydrodemetallization reaction zone is at least filled with a first hydrodemetallization catalyst, wherein the first hydrodemetallization catalyst comprises a carrier component and a hydrogenation active metal component, and the carrier component comprises carbon and alumina. 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 ofthe residual oil is promoted, and the improvement of the reaction performances such as subsequent desulfurization, carbon residue removal and the like is facilitated through the synergistic effect ofall the components under the hydrodemetallization reaction condition.

Description

technical field [0001] The invention relates to a hydrocarbon hydrogenation treatment technology, in particular to a hydrogenation method for removing metal impurities in residual oil. 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, ...

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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