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Hydrodesulfurization catalyst as well as preparation method and application thereof

A hydrodesulfurization and catalyst technology, which is applied in the direction of aluminum hydroxide preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of uneven mixing, non-concentrated pore distribution, insufficient performance of hydrodesulfurization catalyst, etc., and achieve catalytic performance Enhanced effect

Active Publication Date: 2022-05-24
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the composite oxide prepared by this method has a large number of micropores, the pore distribution is not concentrated, and it does not reveal the acidity of the prepared material.
[0004] CN1201865A discloses a phosphorus- and silicon-containing alumina carrier and its preparation method. In this method, additive phosphorus is added in the precipitation aging process, and additive silicon is added in the carrier molding process, and the raw material of additive silicon is nano-silica , used for the pore structure of the carrier, so that the pore distribution of the carrier is concentrated and the acidity of the carrier is increased, but this method is a physical and solid particle mechanical mixing of pseudo-boehmite and silica sol, and there is a problem of uneven mixing
[0005] It is difficult to provide an alumina support with a specific proportion of acidity and a high concentration of pore distribution in the existing technology, and the hydrodesulfurization catalyst prepared from this support is insufficient in performance

Method used

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  • Hydrodesulfurization catalyst as well as preparation method and application thereof

Examples

Experimental program
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Embodiment approach

[0053] According to a preferred embodiment provided by the present invention, the method for preparing the carrier comprises the following steps:

[0054] (1) neutralize the solution containing the first silicon-containing compound and the acidic aluminum-containing compound with the alkaline aluminum-containing compound solution; the conditions for the neutralization reaction include: the pH value is 6-9, and the reaction temperature is 30- 75℃;

[0055] (2) aging the solid product obtained in step (1), and introducing a second silicon-containing compound before and / or during the aging; the aging conditions include: an aging temperature of 30-95° C., Aging time is 0.5-12h;

[0056] (3) carrying out optional washing with the solid product obtained in step (2), and then carrying out optional drying and / or roasting to obtain an alumina composition;

[0057] (4) mixing and molding the alumina composition obtained in step (3) with extrusion aid, peptizer and optional auxiliary, ...

preparation example 1

[0063]Weigh 666 grams of aluminum sulfate, add deionized water, dissolve into an aluminum sulfate solution with a molar concentration of 0.5 mol / L, add 10 grams of water glass with a silicon dioxide concentration of 10 wt % in the solution, and stir it evenly. a1: Weigh 800 grams of sodium metaaluminate, add deionized water, and dissolve it into a solution with a molar concentration of 3.0 mol / L, which is recorded as solution b1. The solution a1 and the solution b1 were simultaneously added to a 2.5-liter gel-forming tank in a co-current manner for neutralization reaction, and the inflow speed of the solution a1 and the solution b1 was controlled so that the pH value of the reaction process was 6.5, and the gel-forming tank temperature was 40°C. The resulting white precipitate was aged at 40°C for 5 hours, 100 grams of water glass with a silica concentration of 30% by weight was added and the aging was continued for 3 hours, filtered, and the filter cake was washed three times...

preparation example 2

[0065] Weigh 483 grams of aluminum chloride, add deionized water and dissolve it into a solution with a molar concentration of 1 mol / L, add 50 grams of silica sol with a silica concentration of 10% by weight in this solution, and stir it evenly. Take 800 grams of sodium metaaluminate, add deionized water and dissolve it into a solution with a molar concentration of 2 mol / L, denoted as solution b2. The solution a2 and the solution b2 were simultaneously added to a 2.5-liter gel-forming tank in a co-current manner for neutralization reaction, and the inflow speed of the solution a2 and the solution b2 was controlled to make the pH value of the reaction process 8.0, and the gel-forming tank temperature was 60°C. The resulting white precipitate was aged at 60°C for 1.5 hours, added with 100 grams of silica sol with a silica concentration of 25% by weight and continued to age for 1.5 hours, filtered, and the filter cake was washed with 20 times (weight) deionized water at 60°C for ...

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Abstract

The invention discloses a hydrodesulfurization catalyst as well as a preparation method and application thereof. The hydrodesulfurization catalyst contains a silicon-containing alumina carrier and active metal loaded on the carrier. The carrier has high pore distribution concentration and a specific ratio of B acid and L acid, and through low-temperature nitrogen adsorption analysis, the dv / dlogD value is 2.5-4.0, the pore volume is 0.5-0.8 ml / g, and the specific surface area is 250-320 m < 2 > / g; through pyridine adsorption infrared spectroscopic analysis, the peak area ratio of the B acid to the L acid at 200 DEG C is 0.04-0.20, and the peak area ratio of the B acid to the L acid at 350 DEG C is 0.05-0.20. The preparation method of the hydrodesulfurization catalyst comprises the steps of preparing the silicon-containing alumina carrier and introducing the active metal into the carrier, and compared with the prior art, the hydrodesulfurization performance of the catalyst provided by the invention is obviously improved.

Description

technical field [0001] The present invention relates to a hydrodesulfurization catalyst and a preparation method thereof. The invention can be applied to the fields of petroleum refining and chemical industry. Background technique [0002] In the petrochemical industry, catalysts play a very important role, and most reactions are completed with the participation of catalysts. Most of the catalysts in the petrochemical industry are supported catalysts, that is, they are composed of a carrier and active components supported on the carrier. The carrier materials are often selected from alumina, silica, titania and other materials. The pore structure and surface acidity of the carrier have an important influence on the catalytic performance of the catalyst. A more concentrated pore distribution will increase the utilization efficiency of the pore structure, and a specific proportion of acidity will also increase the catalytic performance of the catalyst. [0003] CN1074303A di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J21/06B01J32/00B01J35/10C10G45/04C10G45/08C01F7/34C01F7/14C01B33/12
CPCB01J23/883B01J21/06B01J23/002C10G45/04C10G45/08C01F7/34C01F7/14C01B33/12B01J2523/00C01P2006/14C01P2006/12C01P2006/90C01P2004/80B01J35/635B01J35/615B01J2523/31B01J2523/41B01J2523/68B01J2523/847Y02P20/52
Inventor 刘滨杨清河曾双亲桑小义
Owner CHINA PETROLEUM & CHEM CORP
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