Catalyst for heavy oil fixed bed hydrogenating treatment and its preparation process

A hydrogenation treatment and catalyst technology, applied in the direction of naphtha catalytic reforming, etc., can solve the problems of clogging the catalyst bed, low level of impurity removal, failure to improve the activity of the protection catalyst and demetallization catalyst, etc. Effect of Hydrogen Saturation Capacity

Inactive Publication Date: 2005-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the existing technology is that the level of impurity removal is not high, especially in the removal of heavy metals and reduction of residual carbon value.
Therefore, the activity of the protection catalyst and the demetallization catalyst cannot be improved, otherwise a large amount of impurities will be deposited here quickly, blocking the catalyst bed and forcing the production to be interrupted, which is not desirable in the nature of the fixed bed hydrogenation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 298g Si-Al 2 o 3 (dry basis 67w%, silicon content is 13%) powder, powdered activated carbon 24.5g Tianqing powder 5g, the three are mixed uniformly, add by 208g water, 22.0g contain 17w%TiCl 3 TiCl 3 Acidic solution mixed with 22g HAc (acetic acid), kneaded for 1.5 hours, and the obtained plastic body was made into Φ2.58~2.64mm special-shaped strips with an extrusion machine, and the strips were dried at 108°C for 4 hours , and calcined at 880°C for 3 hours to obtain a catalyst carrier.

[0014] Using a general impregnation method, impregnate the carrier in two steps with an active metal solution (ammonium metatungstate + nickel nitrate solution; ammonium molybdate + ammonia solution), and then dry at 80°C / 120°C for 5 hours / 3 hours, respectively. Calcined at 480°C / 530°C for 3 hours / 2 hours to make catalyst CAT-1. The composition and main properties of the catalyst are shown in Table 1.

Embodiment 2

[0016] In the carrier preparation process of Example 1, no powdered activated carbon was used, the carrier calcination temperature was 980° C., and other conditions remained unchanged, that is, the catalyst CAT-2 of this example was prepared. The composition and main properties of the catalyst are shown in Table 1.

Embodiment 3

[0018] In the carrier preparation process of Example 1, Si-Al containing silicon dioxide of 15w% was used 2 o 3 powder, increasing the amount of titanium, and extruding the plastic body into a special-shaped strip of Φ1.10-1.35mm. The strip was dried at 108°C for 4 hours and roasted at 750°C for 4 hours to obtain a carrier. Catalyst preparation conditions remain unchanged, that is, the catalyst CAT-3 of this example is prepared. The composition and main properties of the catalyst are shown in Table 1.

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PUM

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Abstract

The invention relates to a heavy oil fixed-bed hydrotreating catalyst and a preparation method thereof. The catalyst has a large pore size and high activity, is suitable for conversion reactions of macromolecular components such as asphaltene and heavy colloids, and is hydrogenated with conventional heavy and residual oils. The treatment catalyst is used together to obtain a higher rate of impurity removal, especially the rate of carbon residue removal and heavy metal removal is greatly improved. When the catalyst of the present invention is combined with the existing catalyst, it should be installed after the desulfurization catalyst and before the denitrogenation catalyst. It has an ideal treatment effect on various heavy and residual oil raw materials, and is especially suitable for residual oil raw materials with high residual carbon value. Hydrotreating process.

Description

technical field [0001] The invention relates to a heavy oil hydrogenation treatment catalyst and a preparation method thereof, in particular to a heavy oil fixed bed hydrogenation upgrading and conversion process catalyst and a preparation method thereof. Background technique [0002] In the process of hydrotreating heavy oil, especially residual oil, due to the high content of impurities in raw materials, especially the organic metal compounds such as oil-soluble nickel and vanadium, they have a strong poisoning effect on hydrodesulfurization and denitrogenation catalysts , the prior art proposes various methods for removing such impurities from the feed to protect the downstream highly active hydrodesulfurization and denitrogenation catalysts. For example, US Pat. No. 4,447,314 proposes a process for hydrotreating residual oil with a double catalyst bed system. The first catalyst used in this process is a large-pore catalyst, and the second catalyst is a small-pore catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G35/06
Inventor 张皓苏晓波袁胜华赵愉生
Owner CHINA PETROLEUM & CHEM CORP
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