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Grading method of heavy oil hydrotreating catalyst

A heavy oil hydrogenation and catalyst technology, applied in chemical instruments and methods, hydrocarbon oil treatment, petroleum industry, etc., can solve the problem of poor hydrogenation saturation ability of polycyclic aromatic hydrocarbons, low content of hydrogenation active components, and insufficient hydrogenation conversion ability Strong and other problems, to achieve the effect of long service life, high denitrification activity and stability, and slow down the deactivation speed

Active Publication Date: 2020-05-26
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large-pore diameter catalyst for residual oil hydrogenation disclosed in the invention is more suitable for the hydrogenation demetallization process of residual oil. Its hydrogenation active component content is low, the hydrogenation saturation ability of polycyclic aromatic hydrocarbons is poor, the acidity is weak, and the hydrogenation conversion ability is not good. powerful
[0009] In general, the main disadvantage of the existing technology is that the utilization rate of the catalyst in the grading system is not high, and the existing catalyst grading combination system needs to be further optimized

Method used

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  • Grading method of heavy oil hydrotreating catalyst
  • Grading method of heavy oil hydrotreating catalyst
  • Grading method of heavy oil hydrotreating catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0059] This example shows the preparation process of a graded combination of catalysts.

[0060] The following catalyst gradation assembly scheme is adopted, and several catalysts are loaded in the reactor, and the bed is filled with hydrodemetallization catalyst HDM-1, hydrodesulfurization catalyst HDS-1 and hydrodenitrogenation catalyst HDN-1 from top to bottom , the mass proportions added are respectively 45%, 20%, and 35%.

[0061] Hydrodemetallization catalyst HDM-1 has an average pore size of 24.35nm and a particle size of 3.5mm; hydrodesulfurization catalyst HDS-1 has an average pore size of 11.64nm and a particle size of 1.5mm; The average pore diameter is 9.04nm, and the particle diameter is 1.0mm. When the catalyst is loaded along the flow direction, the catalyst activity gradually increases, the pore size gradually decreases, the particle size gradually decreases, and the porosity gradually decreases.

[0062] Then, wet vulcanization is adopted, and the vulcanizin...

Embodiment 2

[0070] This example shows the preparation process of a graded combination of catalysts.

[0071] The following catalyst grading assembly scheme is adopted, and several catalysts are loaded in the reactor, and the bed is filled with hydrodemetallization catalyst HDM-2, hydrodesulfurization catalyst HDS-2 and hydrodenitrogenation catalyst HDN-1 respectively from top to bottom , the mass proportions added are respectively 35%, 20%, and 45%.

[0072] Hydrodemetallization catalyst HDM-2 has an average pore size of 21.67nm and a particle size of 2.2mm; hydrodesulfurization catalyst HDS-2 has an average pore size of 10.10nm and a particle size of 1.2mm; The average pore diameter is 9.04nm, and the particle diameter is 1.0mm. When the catalyst is loaded along the flow direction, the catalyst activity gradually increases, the pore size gradually decreases, the particle size gradually decreases, and the porosity gradually decreases.

[0073] Then, wet vulcanization is adopted, the vul...

Embodiment 3

[0082] This example shows the preparation process of a graded combination of catalysts.

[0083] The following catalyst grading assembly scheme is adopted. Several catalysts are loaded in the reactor, and the bed is filled with hydrodemetallization catalysts (HDM-1, HDM-2, the mass ratio is 1:1) and hydrogenation catalysts from top to bottom. Desulfurization catalyst (HDS-1, HDS-2, the mass ratio is 1:1) and hydrodenitrogenation catalyst HDN-1P, the mass proportions added are 30%, 45%, and 25%, respectively.

[0084] The average pore diameter of the hydrodemetallization catalyst HDM-1 is 24.35nm, and the particle size is 3.5mm; the average pore diameter of the hydrodemetallization catalyst HDM-2 is 21.67nm, and the particle size is 2.2mm; The average pore size is 11.64nm and the particle size is 1.5mm; the average pore size of the hydrodesulfurization catalyst HDS-2 is 10.10nm and the particle size is 1.2mm; the average pore size of the hydrodenitrogenation catalyst HDN-1 is 9...

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Abstract

The invention relates to a grading method of a heavy oil hydrotreating catalyst. A reactor is sequentially filled with a hydrodemetallization catalyst, a hydrodesulfurization catalyst and a hydrodenitrification catalyst from top to bottom, and the catalyst activity is gradually increased, the pore size is gradually reduced, the granularity is gradually reduced and the porosity is gradually reducedalong the material flow direction from top to bottom; the hydrodemetallization catalyst, the hydrodesulfurization catalyst and the hydrodenitrification catalyst respectively and independently consistof one or more catalysts; and active metal MoS2 in the sulfurized hydrodemetallization catalyst, the sulfurized hydrodesulfurization catalyst and the sulfurized hydrodenitrogenation catalyst is highly dispersed and distributed, MoS2 in the sulfurized hydrodemetallization catalyst is mainly dispersed in a single-layer and double-layer manner, and MoS2 in the sulfurized hydrodesulfurization catalyst is mainly dispersed in a double-layer manner. The catalyst grading combination obtained by the method has high demetalization, carbon residue removal, desulfurization and denitrification activity and stability and long service life.

Description

technical field [0001] The invention relates to a grading method of a heavy oil hydrogenation treatment catalyst, in particular to a gradation method of a hydrogenation catalyst used for the hydrorefining and hydrotreating of heavy distillate oil and residual oil. Background technique [0002] The shortage and inferior quality of global oil resources have led to the continuous increase in the proportion of heavy crude oil and high-sulfur crude oil in the crude oil market; at the same time, with the rapid development of my country's economy and increasingly stringent environmental protection regulations, the market demand for clean oil products is also rapidly increasing. The hydrogenation process is becoming more and more important in the refinery. Research and development of new hydrogenation catalysts to achieve deep hydroprocessing of oil products has become an urgent need in hydroprocessing. [0003] In the process of hydrotreating heavy distillate oil, especially residu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/04C10G45/08B01J8/02B01J8/00
CPCC10G45/04C10G45/08B01J8/02B01J8/008C10G2300/202C10G2300/4012C10G2300/4006C10G2300/4018
Inventor 赵愉生赵元生张天琪张志国宋俊男李井泉于双林张春光程涛由慧玲崔瑞利王小丹
Owner PETROCHINA CO LTD
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