Alumina dry glue containing silicon and boron and production thereof

A technology of alumina dry gel and boron compound, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of affecting the physical and chemical properties of the final carrier, the small diameter of alumina gel pores, and insufficient Play its role and other issues to achieve the effect of increasing strength, large pore diameter, and improving acid distribution

Active Publication Date: 2008-10-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alumina gel is prepared by hydrolysis of aluminum alcohol compound and silicon alcohol compound and alkaline solution, and the oxides of silicon, boron and phosphorus are added to the carrier by co-precipitation method, 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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  • Alumina dry glue containing silicon and boron and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 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.

[0038]After the feeding was stopped, the system was aged for 50 minutes under the above-mentioned pH value and temperature conditions, and 40 ml of a solution containing 4.8 g of sodium metasilicate was added, and the system was continued to age for 75 minutes under the above-mentioned pH value and temperature conditions. Filter and wash to Cl - / Al 2 o 3 <0.3wt%.

[0039] After the filter cake was beaten with clean water, 43g of boric acid was added, the temperature was controlled at 50°C, and the feeding time was 40min.

[0040] 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%,...

Embodiment 2

[0042] 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.

[0043] After the feed was stopped, the system was aged for 25 minutes 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, filtered and washed to SO 4 2- / Al 2 o 3 <1.5wt%.

[0044] Dissolve 34.6g of boric acid in clean water, then add wet filter cake to make slurry, control the temperature at 55°C for 40min.

[0045] After filtering and drying the filter cake at 130° C. for 8 hours, it was crushed until the particle size was less than 180 mesh, accounting for more than 95 wt%, to obtain modified alumina dry ...

Embodiment 3

[0047] Add 1000ml of clean water into a container, heat up to 65°C, add 300g of aluminum sulfate (Al 2 (SO 4 ) 3 18H 2 O) solution 2000ml, adding 1011g concentration simultaneously is 15.0gAl 2 o 3 / 100ml of sodium metaaluminate solution, the pH value is controlled at 8.5, the temperature is 64°C, and the feeding time is 120min.

[0048] After the feed was stopped, the system was aged for 60 min under the above pH and temperature conditions, and 245 ml of a solution containing 32 g of sodium metasilicate was added. The system continued to age for 45 minutes under the above pH and temperature conditions, filtered and washed to SO 4 2- / Al 2 o 3 <1.5w%.

[0049] After the filter cake was beaten with clean water, 30 g of boric acid was added, and the temperature was controlled at 45° C. for 40 minutes.

[0050] After the filter cake was dried at 130°C for 8 hours, it was crushed until the particle size was less than 180 mesh, accounting for more than 95w%, to obtain the...

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Abstract

A dry alumina colloid containing Si and B is prepared through continuously forming colloid while adding Si and B assistants step by step for high and uniform dispersity of Si and B. It can be used as the carrier precursor of catalyst to improve the hydrogenation activity of catalyst, especially the hydrodenitrifying activity.

Description

technical field [0001] The invention relates to an alumina dry glue containing silicon and boron and a preparation method thereof, in particular to an alumina dry glue suitable for use as a carrier material of a heavy oil hydrotreating catalyst and a preparation method thereof. Background technique [0002] As we all know, alumina, as a catalytic material, has a very wide range of applications in the field of catalysis, especially in the field of catalytic hydrogenation. However, alumina is used as a catalyst carrier with weak acidity, mainly L acid, and B acid is very weak or considered not to contain B acid; it is easy to strongly interact with active metal 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 active metal components or carriers, which affects the activity and stability of the catalyst. Therefore, when used as a catalyst carrier, one or sever...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/12
Inventor 温德荣王继锋喻正南梁相程
Owner CHINA PETROLEUM & CHEM CORP
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