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Preparation method of macroporous active alumina dry glue with high peptizing index

A technology of activated alumina and alumina, applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of unstable performance of peptized activated alumina, Problems such as poor peptization and low pore structure

Active Publication Date: 2021-07-02
天津凯文特科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] However, the currently used peptized activated alumina has unstable performance and cannot exert stable performance in use.
And the current activated alumina either has good peptization and low pore structure, or good pore structure and poor peptization

Method used

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  • Preparation method of macroporous active alumina dry glue with high peptizing index
  • Preparation method of macroporous active alumina dry glue with high peptizing index
  • Preparation method of macroporous active alumina dry glue with high peptizing index

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below through specific examples.

[0025] 1. Preparation

[0026] A kind of preparation method of the macroporous activated alumina dry glue of high peptization index, comprises the steps:

[0027] Step 1, using aluminum sulfate solution and sodium metaaluminate solution to carry out neutralization and gelation in a co-current manner; the concentration of aluminum oxide in the aluminum sulfate solution in the step 1 is 50-150g / L, and its acid The alkali ratio is 1.4-1.7; preferably, the concentration of aluminum oxide in the aluminum sulfate solution in the step 1 is 100g / L, and the acid-base ratio is 1.55.

[0028] The concentration of aluminum oxide in the sodium metaaluminate solution in the step 1 is 150-250 g / L, and its acid-base ratio is 1.2-1.4. Preferably, the concentration of aluminum oxide in the sodium metaaluminate solution in the step 1 is 200g / L, and its acid-base ratio is 1.28. ...

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Abstract

The invention provides a preparation method of macroporous active alumina dry glue with a high peptizing index. The preparation method comprises the following steps: step 1, neutralizing an aluminum sulfate solution and a sodium metaaluminate solution in a parallel flow manner to gelatinize; and step 2, aging, water-washing, drying and crushing the finished product gelatinized in the step 1 to obtain the activated aluminum oxide. The preparation method has the beneficial effects that the active aluminum oxide product with high peptizing index, large pore volume and large specific surface area can be obtained by controlling the gelatinizing process, raw material indexes and the like.

Description

technical field [0001] The invention relates to the field of preparation of macroporous activated alumina dry glue, in particular to a preparation method of macroporous activated alumina dry glue with high peptization index. Background technique [0002] Activated alumina is a pseudo-boehmite, a white, odorless, non-toxic powder with incomplete composition, low crystallinity, and spatial network structure. Activated alumina has physical properties such as high specific surface area and suitable pore structure. It can be peptized under acidic conditions as a binder for catalytic cracking and hydrogenation catalysts, which is an important application in the petrochemical industry. Peptized activated alumina as a binder can increase the mechanical strength and pore structure of the catalyst to a certain extent, and improve the catalytic performance of the catalyst. Therefore, the peptization performance of activated alumina is directly related to the selectivity, stability and...

Claims

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Application Information

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IPC IPC(8): C01F7/14
CPCC01F7/141C01P2006/12C01P2006/14
Inventor 郝德彪周广增李卫东
Owner 天津凯文特科技有限公司
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