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Preparation process of catalyst for residual oil hydroprocessing

A hydrotreating and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Suitability and other issues, to achieve the effect of simple preparation process

Active Publication Date: 2009-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] US4448896, US4102822 etc. use carbon black, starch and other physical pore-enlarging agents to expand the pore diameter of the catalyst, but the pore distribution is not concentrated and the strength is relatively poor
CN1209355A proposes a kind of macroporous catalyst and its preparation method, under the condition higher than room temperature, carry out peptization or ripening to pseudo-boehmite raw material, the material after forming is treated with the compound containing ammonium ion, makes catalyst pore The pore volume with a diameter of 10-20nm accounts for 70-85% of the total pore volume, and the processing process is more complicated
The neutralization and aging are carried out under the same conditions, and the pores of the prepared catalyst are mainly concentrated in the range of 7-12nm, which is not suitable as a catalyst for heavy distillate oil, especially residual oil hydrotreating

Method used

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  • Preparation process of catalyst for residual oil hydroprocessing
  • Preparation process of catalyst for residual oil hydroprocessing
  • Preparation process of catalyst for residual oil hydroprocessing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 2L sodium metaaluminate aqueous solution (Al 2 O 3 The concentration is 15g / 100ml) and 3L aluminum sulfate aqueous solution (Al 2 O 3 The concentration is 4g / 100ml) respectively into the container at the upper position, and the flowmeter flows into a stainless steel container with a stirrer and heating jacket filled with 6L of purified water, and heated to 70℃; while stirring, add aluminum sulfate Solution, make the pH value of the slurry drop to 3.5. After stabilizing for 5 minutes, add the two materials into the stainless steel tank at a certain speed at the same time, keep the pH at 7.2, and neutralize for 15 minutes. After neutralization for a period of time, stop adding aluminum sulfate solution to increase the pH to 9, stop adding sodium metaaluminate solution, and stabilize for a period of time; pass in aluminum sulfate solution to lower the pH to 3 and stabilize for a period of time; pass in Sodium metaaluminate solution to increase the pH to 9. Repeat the swing...

Embodiment 2

[0046] Compared with Example 1, the process of changing the pH value of the swing solution from 9 to 3 and then to 9 was repeated twice. The amount of other materials and operating conditions were the same as those in Example 1, and sample 2 was obtained.

Embodiment 3

[0048] Compared with Example 1, the aging temperature was increased to 120°C, and the amount of other materials and operating conditions were the same as those of Example 1, and sample 3 was obtained.

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Abstract

The invention relates to a preparation method of a hydrogenation catalyst, which comprises the cocurrent neutralization and swing neutralization process of an acidic aluminum salt solution and an alkaline aluminate solution, aging of the neutralized material, and then filtering, washing, molding, drying and roasting , impregnation and activation to obtain a catalyst. The aging in the preparation process is carried out under the conditions higher than the neutralization temperature and higher than the neutralization pH value. The method of the invention does not need to change the existing catalyst preparation process, only needs to adjust the process conditions of the neutralization and aging process, and the preparation process is simple. The catalyst prepared by the method of the invention has a large pore diameter and a large pore volume, and has good stability in removing impurities, and can be used in the hydrogenation process of heavy and residual oils.

Description

Technical field [0001] The invention relates to a preparation method of a residue hydrotreating catalyst. Background technique [0002] Catalyst properties such as pore size play an important role in the activity stability of the catalyst. For heavy distillate oil, especially residual oil, due to the high content of metal impurities (such as Ni, V, etc.), metal impurities in the heavy distillate oil or residual oil are not only deposited between the catalyst particles during the hydroprocessing process , Also deposited in the catalyst particles. Studies have shown that the main reason for the deactivation of residue hydrotreating catalysts, especially demetallization catalysts, is that metal impurities deposit near the pores of the catalyst, which block the pores and deactivate the catalyst. If the pore size is small, it is easy to block the pores of the catalyst due to the deposition of metal impurities, so that the reactants cannot enter the pores of the catalyst. Even if there...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/85B01J21/04C10G45/08
Inventor 刘喜来赵愉生隋宝宽安晟张雪梅
Owner CHINA PETROLEUM & CHEM CORP