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Preparation method of hydrogenation catalyst containing silicon and zirconium

A hydrogenation catalyst and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Uniform dispersion etc.

Active Publication Date: 2009-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned prior art often uses the coprecipitation method or adds auxiliary agent zirconium when molding, and the former will cause ZrO 2 It enters the bulk phase during the co-precipitation process, and multiple substances are precipitated at the same time. The same precipitation conditions cannot be the best precipitation conditions for multiple substances at the same time, thus affecting the physical and chemical properties of the final carrier; while the latter is added to the kneading process. precursor, which is not conducive to the uniform dispersion of zirconium, both of which will cause ZrO 2 The utilization rate is reduced, and it is not conducive to the improvement of the performance of the catalyst

Method used

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Examples

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preparation example Construction

[0028] According to the preparation method of hydrotreating catalyst provided by the present invention, its concrete steps are as follows:

[0029] 1 Preparation of alumina dry rubber powder containing silicon and zirconium

[0030] 1. Add an appropriate amount of deionized water into the container. The aluminum-containing compound solution is acidic aluminum salt solution (aluminum chloride, aluminum nitrate, aluminum sulfate, etc.) or alkaline aluminum salt solution (sodium aluminate, etc.), and the precipitant is the same as the above A substance that undergoes a precipitation reaction in an aluminum-containing compound solution, such as an alkaline solution that can react with an acidic aluminum salt, and an acidic solution that can react with an alkaline aluminum salt solution. The concentration of aluminum-containing compound solution is Al 2 o 3Calculated as 1g to 30g / 100mL, preferably 2g to 20g / 100mL. The gelling temperature is 30°C-90°C, preferably 45°C-80°C; the g...

Embodiment 1

[0058] Add 1L deionized water into the container, raise the temperature to 62°C, and add 3L containing Al 2 o 3 4g / 100mL aluminum chloride solution and containing NH 3 It is 10g / 100mL ammonia solution, the pH value is controlled at 8.0, and the feeding time is 80min. After stopping the feed, the system was aged for 50min under the above temperature and pH conditions, and SiO was added 2 Add 100mL of sodium metasilicate solution with a content of 10g, continue to age for 10min, then add 120mL of zirconium oxychloride solution with a Zr content of 8g, finish adding in 10min, after the addition, the pH value of the material is 6.5, continue to age for 60min, and then wash 4 times , to Cl - / Al 2 o 3 <0.5% up to. After the filter cake is dried at 100° C. for 15 hours, it is crushed until the particle size is less than 180 mesh, accounting for more than 95%, to obtain dry rubber powder containing silicon and zirconium.

[0059] Take 200g of the above-mentioned dry rubber pow...

Embodiment 2

[0063] Add 1L deionized water into the container, raise the temperature to 65°C, and add 3L containing Al 2 o 3 5g / 100mL aluminum nitrate solution and containing NH 3 It is 10g / 100mL ammonia solution, the pH value is controlled at 8.2, and the feeding time is 45min. After stopping the feeding, the system was aged for 20min under the above temperature and pH value conditions, and SiO was added 2 100ml of sodium metasilicate solution with a content of 6g was aged for 40min, and then filtered. After stirring the filter cake in the container, add OH - Add 100 mL of sodium hydroxide solution with a content of 5 g in 10 minutes, then add 100 mL of a zirconyl nitrate solution with a zirconium content of 15 g, and the addition time is 20 minutes. After the addition, the pH value of the material is 7.5, continue to stir for 30 minutes, and then filter. Wash 3 times to NO 3 - / Al 2 o 3 <0.8%. After the filter cake is dried at 120° C. for 10 h, it is crushed until the particle s...

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Abstract

The invention discloses a method for preparing a hydrogenation catalyst. The catalyst contains auxiliary agents of silicon and zirconium, and carries at least one metal element of VIB family and at least one metal element of VIII family. The assistant silicon and the zirconium are added during gelling of aluminum oxide, so that the silicon and the zirconium are evenly dispersed on the surface of the aluminum oxide, and can give full play to the auxiliary agent. Simultaneously, the catalyst has proper acidic property, so the catalyst shows higher activities of hydrodenitrification and hydrodesulphurization, and has higher activity and stability.

Description

technical field [0001] The invention relates to a method for preparing a hydrogenation catalyst, in particular to a method for preparing a hydrogenation catalyst containing silicon and zirconium. Background technique [0002] Most supported catalysts are prepared by impregnation method, such as various hydrogenation catalysts. Alumina is often used as a carrier material for this type of catalyst. but pure Al 2 o 3 The interaction force between the active metal on the surface and the carrier is relatively large, and it is easy to form inactive species (such as nickel-aluminum spinel, etc.), and it is difficult to completely vulcanize to form an active phase with high hydrogenation activity. How to weaken the strong interaction between the metal and the support becomes the key to the preparation of highly active hydrogenation catalysts. [0003] In order to improve the activity and stability of hydrotreating catalysts, it is often necessary to chemically modify the carrier...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J23/888
Inventor 彭绍忠姜虹杨占林刘雪玲
Owner CHINA PETROLEUM & CHEM CORP
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