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Silicon and boron contained alumina carrier and production thereof

A technology of alumina carrier and macroporous alumina, which is applied in catalyst carriers, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of affecting the physical and chemical properties of the final carrier, the small diameter of alumina gel pores, and the inability to give full play to its performance. The effect of high HDN reactivity, easy reduction and vulcanization, and increased quantity

Active Publication Date: 2008-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alumina preparation process is prepared by hydrolysis of organic aluminum salts, and the oxides of silicon, boron and phosphorus are added to the carrier by co-precipitation, and the preparation method is complicated
Since the silicon, boron and phosphorus elements are added to alumina by co-precipitation method, most of the silicon, boron and phosphorus elements are bound to be dispersed in the alumina bulk phase, so their effects cannot be fully exerted.
In addition, the co-precipitation method is the simultaneous precipitation of multiple substances, and the same precipitation conditions cannot be the optimal precipitation conditions for multiple substances at the same time, thus affecting the physical and chemical properties of the final carrier.
Moreover, the diameter of the alumina gel prepared by this method is small, and it is only suitable for the carrier of distillate oil hydrotreating catalyst

Method used

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  • Silicon and boron contained alumina carrier and production thereof
  • Silicon and boron contained alumina carrier and production thereof

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preparation example Construction

[0026] According to the preparation method of the alumina carrier provided by the present invention, its specific steps are respectively as follows:

[0027] (a) Preparation of silicon and boron macroporous alumina

[0028] The macroporous alumina containing silicon and boron used in the preparation process of the alumina carrier of the present invention is prepared by a colloidal method, which can disperse most of the silicon and boron elements with less content on the surface of the alumina. The specific preparation steps as follows:

[0029] (1) Add a certain amount of deionized water into a container, and add an acidic salt solution containing aluminum ions under certain temperature and stirring conditions. These acidic salt solutions containing aluminum ions can be aluminum chloride, aluminum sulfate or nitric acid Aluminum solution, its concentration is Al 2 o 3 It is calculated as 2g / 100ml-8g / 100ml, preferably 3g / 100ml-6g / 100ml. At the same time, ammonia water is add...

Embodiment 1

[0054] Add 1000ml of clean water into a container, raise the temperature to 65°C, add 3700ml of a solution containing 310g of aluminum chloride, and at the same time add 10g of NH 3 / 100ml of ammonia solution, the pH value is controlled at 8.2, the temperature is 62°C, and the feeding time is 60min. After the feed was stopped, the system was aged for 50 min under the above pH and temperature conditions, and 40 ml of a solution containing 4.8 g of sodium metasilicate was added. The system continued to age for 75 minutes under the above pH value and temperature conditions, filtered and washed to Cl - / Al 2 o 3 <0.3wt%. After the filter cake was beaten with clean water, 43g of boric acid was added, and the temperature was controlled within 50°C for 40 minutes. Filter and dry the filter cake at 130° C. for 8 hours, and crush it until the particle size is less than 180 mesh, accounting for more than 95 wt%, to obtain silicon and boron-containing macroporous alumina.

[0055] T...

Embodiment 2

[0057] Add 1000ml of clean water into a container, heat up to 65°C, add 560g of aluminum sulfate (Al 2 (SO 4 ) 3 18H 2 O) solution 3700ml, adding concentration simultaneously is 10gNH 3 / 100ml of ammonia solution, the pH value is controlled at 7.6, the temperature is 60°C, and the feeding time is 80min. After the feed was stopped, the system was aged for 15 min under the above pH and temperature conditions, and 100 ml of a solution containing 15.3 g of sodium metasilicate was added. The system continued to age for 75 minutes under the above pH and temperature conditions. Filter washed to SO 4 2- / Al 2 o 3 <1.5wt%. Add 34.6g of boric acid into clean water, and after dissolving, add the filter cake for beating, control the temperature at 55°C, and the time is 40min. After filtering, the filter cake was dried at 130° C. for 8 hours, and then crushed until the particle size was less than 180 mesh, accounting for more than 95 wt%, to obtain modified macroporous alumina. ...

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Abstract

A Si and B contained alumina carrier for the hydrogenating catalyst, especially the hydrodenitrifying catalyst, is prepared from macroreticular alumina and millipore alumina through continuously forming colloid while introducing Si and B step by step to disperse the most of Si and B on the surface of alumina.

Description

technical field [0001] The invention relates to an alumina carrier containing silicon and boron, in particular to a catalyst carrier for hydrogenation treatment of heavy distillate oil containing silicon and boron and a preparation method thereof. Background technique [0002] As we all know, alumina, as a carrier material, has a very wide range of applications in the field of catalysis, especially in the field of catalytic hydrogenation. But, aluminum oxide is used as catalyst carrier acid weak, and mainly L acid, and B acid is then extremely weak or does not think to contain B acid; It is easy to strongly interact with metal active components to form inactive species (such as easy to react with nickel form nickel-aluminum spinel). Simply using alumina as a catalyst carrier is prone to sintering of the metal active component or carrier, which affects the activity and stability of the catalyst. Therefore, when used as a catalyst carrier, one or several other elements are us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00
Inventor 温德荣王继锋喻正南梁相程姜虹
Owner CHINA PETROLEUM & CHEM CORP
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