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Production method of pseudo-boehmite

A technology of pseudo-boehmite and production method, applied in the field of pseudo-boehmite production by carbonization, can solve the problems of large fluctuation of product quality, long reaction time, small production capacity, etc. Chemical production, the effect of promoting the neutralization reaction

Active Publication Date: 2017-05-24
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The above method adopts the direct introduction of CO into the reaction device 2 It is decomposed into glue, so there are the following disadvantages: the process equipment is backward, the automation level is low, and the labor efficiency is low; the traditional decomposition tank is harmful to CO 2 Low absorption rate, small production capacity; long reaction time, large fluctuations in product quality; easy scarring of production equipment, short operating cycle; difficult to achieve continuous production

Method used

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Examples

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Effect test

Embodiment 1

[0066] See Table 1 for other process conditions of Examples 1-5, and see Table 2 for the performance parameters of the obtained pseudo-boehmite. The XRD pattern of the pseudo-boehmite prepared in Example 1 is shown in figure 2 .

[0067] Table 1

[0068]

[0069] Table 2

[0070] performance parameters Example 1 Example 2 Example 3 Example 4 Example 5 Pore ​​volume V(ml / g) 0.34 0.43 0.50 0.60 0.40 Specific surface area (m 2 / g)

400.50 378.80 320.50 311.33 360.87

[0071] The performance parameters of the pseudo-boehmite obtained in Examples 1-5 have little change, which shows that the method of the present invention can obtain pseudo-boehmite products with stable quality.

[0072] In addition, Examples 1-5 were repeated 5 times respectively, and the variation range of the performance parameters of the obtained pseudo-boehmite was less than 0.5%, which indicated that the method of the present invention had good repeatabilit...

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Abstract

The invention discloses a production method of pseudo-boehmite. The production method comprises the following steps: the step of gel-forming, the step of aging, the step of separation and washing and the step of drying. During the step of gel-forming, a meta-aluminate solution and carbon dioxide gas are contacted with each other in an inorganic membrane reactor so as to form a reaction product. By the method of the invention, pseudo-boehmite of stable quality can be produced.

Description

technical field [0001] The invention relates to a method for producing pseudo-boehmite, in particular to a method for producing pseudo-boehmite by carbonization. Background technique [0002] Alumina powder is often used as a desiccant, adsorbent, catalyst and catalyst carrier in the chemical industry. However, natural or artificially produced alumina monohydrate and alumina trihydrate have low specific surface area, small pore volume, and low activity, so they cannot be used as desiccants, adsorbents, catalysts, and catalyst supports. Pseudo-boehmite has the characteristics of high specific surface area, large pore volume, large pore diameter, and high activity. It is suitable for use as desiccant, adsorbent, and catalyst and catalyst carrier in the fields of petrochemical, fertilizer, and tail gas. Therefore, there is a need to convert alumina monohydrate or alumina trihydrate to pseudoboehmite. [0003] Pseudo-boehmite has low crystallinity, higher water content than bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/14
Inventor 史建公蒋绍洋刘志坚张敏宏张文平文建军罗道威史建新张新军伊红亮钟健李卫红
Owner CHINA PETROLEUM & CHEM CORP
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