High-silicon amorphous silica aluminum and preparation method thereof

An amorphous silicon-alumina and high-silicon technology, which is applied in chemical instruments and methods, catalyst carriers, physical/chemical process catalysts, etc., can solve the problems of small adjustable range, poor performance, and unfavorable amorphous silicon-alumina Uniform distribution and other issues, to achieve the effect of increasing pore volume and specific surface area, simple preparation process, and control of preparation cost

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

Although it has a certain cracking activity, when it carries a relatively high amount of metal components, the pore structure of the prepared catalyst cannot meet the requirements of actual use.
CN03133986.7 and CN200410050785.X have introduced two kinds of preparation methods that adopt carbonization method to form colloid to prepare amorphous silicon aluminum, but the use of carbonization method is limited by factors such as equipment, raw materials and the adjustable range of pH of colloidal formation, can not be very good To meet the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Example 1 (comparative experiment)

[0027] 2000mL containing Al 2 o 3 5g / 100mL AlCl 3 The solution and the ammonia solution with a concentration of 10% flow together to form a gel. The reaction temperature is 65°C, the pH value is controlled at 8.0, and the reaction contact time is 40min. After the gelation is completed, 20g of SiO 2 / 100mL of sodium silicate solution 300mL, adjust the pH value to 9.0 for aging. The aging time was 1.5 hours. The product was filtered, and then washed with deionized water with a solid-to-liquid ratio of 1:20 at a washing temperature of 70° C. for 3 times. The obtained filter cake was dried at 120° C. for 3 h.

example 2

[0028] Example 2 (comparative experiment)

[0029] The amount of sodium silicate in Example 1 was changed to 600 mL.

example 3

[0030] Example 3 (comparative experiment)

[0031] The sodium silicate in Example 1 is replaced by 180mL concentration of silica sol solution that is 33g / 100mL.

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PUM

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Abstract

The invention discloses high-silicon amorphous silica alumina and a preparation method thereof. The amorphous silica alumina product has the properties of a specific surface area of 400 to 650m/g, a pore volume of 1.0 to 2.0cm/g, a silicon oxide content of 20 to 80wt percent, a infrared acid content of 0.3 to 0.8 mmol/g and evenly distributed acidic centers. Moreover, the amorphous silica alumina is prepared by a method comprising first coprecipitation of silicon oxide and alumina and then modification of organic silicon. Compared with the prior art, the amorphous silica alumina has larger pore volume and specific surface area, evenly distributed acidic centers and excellent service performance; moreover, the preparation method is simple, free from special environmental protection problem and low in production cost.

Description

technical field [0001] The invention relates to an acidic amorphous silicon-alumina with high silicon, large pore volume and large specific surface area and a preparation method thereof. technical background [0002] In the field of catalysis, how to prepare high-efficiency catalysts with high activity, excellent selectivity and long life has always been a subject of concern and attention. For supported catalysts with amorphous silica-alumina as the carrier, amorphous silica-alumina not only bears the task of supporting other active components, but also has a certain acid cracking function and plays the role of solid acid catalysis. The use of amorphous silica-alumina carrier with high specific surface area can prepare a supported catalyst with high dispersion of active components, which is conducive to improving the reaction performance of the catalyst; the catalyst containing amorphous silica-alumina has a larger pore volume, which will improve Its anti-coking or anti-cok...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/12
Inventor 杜艳泽王凤来关明华刘昶陈光
Owner CHINA PETROLEUM & CHEM CORP
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