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Method for preparing silicon and zirconium containing aluminum oxide carrier

A technology of alumina carrier and zirconium alumina, which is applied in the direction of catalyst carrier, chemical instruments and methods, chemical/physical processes, etc., can solve the problems affecting the physical and chemical properties of the final carrier, unfavorable catalyst performance, unfavorable uniform dispersion of zirconium, etc., to achieve Strong modulation, enhanced activity, and improved performance

Active Publication Date: 2010-01-06
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

[0023] According to the preparation method of the alumina carrier provided by the invention, its specific steps are as follows:

[0024] 1 Preparation of alumina dry rubber powder containing silicon and zirconium

[0025] 1. Add an appropriate amount of deionized water into the container. The aluminum-containing compound solution is an acidic aluminum salt solution (aluminum chloride, aluminum nitrate, aluminum sulfate, etc.) or an 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 3 Calculated as 1g to 30g / 100mL, preferably 2g to 20g / 100mL. The gelling temperature is 30°C-90°C, preferably 45°C-80°C; the gelli...

Embodiment 1

[0050] Add 1L of deionized water to the container, raise the temperature to 62°C, and add 3L of Al-containing 2 O 3 It is 4g / 100mL of aluminum chloride solution and containing NH 3 It is 10g / 100mL ammonia solution, the control pH value is 8.0, and the feeding time is 80min. After the feeding was stopped, the system was aged for 50 min under the above temperature and pH conditions, and SiO was added. 2 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, add 10min, the pH value of the material is 6.5 after the addition, continue to age for 60min, and then wash 4 times , to Cl - / Al 2 O 3 <0.5%. After drying the filter cake at 100° C. for 15 hours, it was pulverized until the particle size was less than 180 mesh and accounted for more than 95% to obtain dry rubber powder containing silicon and zirconium.

[0051] Take 200g of the above-mentioned dry rubber powder, ...

Embodiment 2

[0053] Add 1L of deionized water to the container, raise the temperature to 65°C, and add 3L of Al-containing 2 O 3 It is 5g / 100mL of aluminum nitrate solution and containing NH 3 It is 10g / 100mL ammonia solution, the control pH value is 8.2, and the feeding time is 45min. After the feeding was stopped, the system was aged for 20 min under the above temperature and pH conditions, and SiO was added. 2 100ml of sodium metasilicate solution with a content of 6g, continue to age for 40min, and then filter. After stirring the filter cake in the container, add OH - 100mL of sodium hydroxide solution with a content of 5g was added in 10min, and then 100mL of zirconium oxynitrate solution with a zirconium content of 15g was added. The addition time was 20min. After the addition, the pH value of the material was 7.5, continued stirring for 30min, and then filtered. Wash 3 times to NO 3 - / Al 2 O 3 <0.8%. After drying the filter cake at 120° C. for 10 hours, pulverize it until ...

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Abstract

The invention discloses a method for preparing a silicon and zirconium containing aluminum oxide carrier. The silicon and zirconium in the carrier are added in the glue forming process of the aluminum oxide; and by optimizing process and conditions under which the auxiliary agents of silicon and zirconium are added in the dry glue of the aluminum oxide, the silicon and zirconium are evenly dispersed on the surface of the aluminum oxide, so that the actions of the auxiliary agents can be fully utilized. The silicon and zirconium containing aluminum oxide carrier prepared by the method has the advantages of larger pore volume and reference area and proper surface acidity, and can achieve higher activity and more ideal active stability when the carrier is used for the hydrogenation treatment of heavy mass raw materials.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier containing silicon and zirconium, in particular to a method for preparing a catalyst carrier for hydrogenation treatment 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 the formation of nickel-aluminum spinel), 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 catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/12B01J21/06C10G45/04
Inventor 彭绍忠刘雪玲杨占林姜虹
Owner CHINA PETROLEUM & CHEM CORP
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