Preparation method of high-silicon macroporous amorphous silicon aluminum dry glue by using carbonation method

A technology of amorphous silicon-alumina and carbonization method, which is applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve the problems of low utilization rate of carbon dioxide, insufficient pH adjustment ability of neutralization reaction, etc., and achieves favorable The effect of control, large pore volume, and improvement of utilization rate

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of low utilization rate of carbon dioxide in the above-mentioned conventional carbonization method and the insufficient adjustment ability of the pH value of the neutralization rea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Example 1 (comparison scheme)

[0028] Prepare solid sodium aluminate to a concentration of 18.0gAl 2 o 3 / 100mL concentrated sodium aluminate solution, then diluted to a concentration of 5.6gAl 2 o 3 / 100mL sodium aluminate working solution, take SiO 2 28wt% sodium silicate solution, then diluted to a concentration of 9.4gSiO 2 / 100mL sodium silicate working solution. Take 6000mL sodium aluminate working solution and put it in the gel forming tank, control the reaction temperature below 30°C, and the flow rate is 6Nm 3 / h, CO with a concentration of 80v% 2 Gas, after 25 minutes, add 1700mL sodium silicate working solution dropwise, the final pH value is 9.0, stop passing carbon dioxide gas; raise the temperature to 65°C, and perform aging for 60 minutes; then filter, filter and wash with 75°C deionized water until neutral; Dry at 120°C for 4 hours, pulverize and sieve to obtain the amorphous silica-alumina product GL-1.

example 2

[0029] Example 2 (comparison scheme)

[0030] The amount of sodium aluminate solution of the same concentration in Example 1 was reduced to 2500mL, while the amount of sodium silicate was raised to 3500mL, and the others were the same as in Example 1, and the product number of the prepared silica-alumina dry glue was GL-2.

example 3

[0031] Example 3 (comparison scheme)

[0032] The sodium silicate in the example 2 is changed into the same SiO 2 The tetraethyl orthosilicate of content metering, other is the same as example 2, and the product number of preparation silica-alumina dry glue is GL-3.

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PUM

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Abstract

The invention relates to a preparation method of high-silicon macroporous amorphous silicon aluminum dry glue by using a carbonation method. The preparation method comprises steps of: (1) separately preparing a sodium aluminate solution and a silicon-containing compound material; (2) adding the sodium aluminate solution into a sealed pressure reactor, feeding carbon dioxide under stirring, with the pressure being raised to 0.2-2.0 MPa, the reaction temperature being controlled to be 10-35 DEG C and the reaction pressure during a reaction process being maintained; (3) adding a measured solution of the silicon-containing compound in to the reactor, feeding the carbon dioxide under stirring, with the reaction pressure being controlled at 0.2-2.0 MPa, the reaction temperature being controlled at 10-35 DEG C and the reaction pressure being maintained during the reaction process; and (4) ageing after the neutralization reaction is finished, filtering, washing and drying to obtain an amorphous silicon aluminum dry glue product. Compared with the prior art, the preparation method increases the utilization rate of the carbon dioxide, improves the environment of the neutralization reaction, and facilitates quality improvement of the amorphous silicon aluminum dry glue product.

Description

technical field [0001] The invention relates to a method for preparing amorphous silicon-alumina, in particular to a method for preparing macroporous amorphous silicon-alumina dry glue by carbon dioxide neutralization method (that is, carbonization method). Background technique [0002] Amorphous silica-alumina, as the active component of solid acid catalyst or supported catalyst carrier, has good hydrocarbon cracking activity and good pore structure characteristics, and plays a very important role in improving the selectivity of medium oil and alleviating the accumulation of fused ring aromatics . Amorphous silica-alumina has certain pore volume and specific surface area, so it can be used as catalyst carrier or adsorbent in oil refining and petrochemical industry. Amorphous silica-alumina as a catalyst carrier requires itself to have a large specific surface and pore volume to ensure the dispersion of catalyst active components, and as a carrier for cracking catalysts, am...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/12
Inventor 杜艳泽刘昶王凤来
Owner CHINA PETROLEUM & CHEM CORP
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