Method for producing pseudo-boehmite using inorganic membrane reactor

A pseudo-boehmite and inorganic membrane technology, applied in chemical instruments and methods, inorganic chemistry, aluminum compounds, etc., can solve problems such as large fluctuations in product quality, long reaction time, and small production capacity, and achieve continuous production , Inhibit spontaneous hydrolysis reaction, promote the effect of 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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  • Method for producing pseudo-boehmite using inorganic membrane reactor
  • Method for producing pseudo-boehmite using inorganic membrane reactor
  • Method for producing pseudo-boehmite using inorganic membrane reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] See Table 1 for other process conditions of Examples 1-3, 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 .

[0069] Table 1

[0070]

[0071] Table 2

[0072] performance parameters Example 1 Example 2 Example 3 Pore ​​volume V(ml / g) 0.38 0.42 0.44 Specific surface area (m 2 / g)

420.23 360.75 289.59

[0073] The performance parameters of the pseudo-boehmite obtained in Examples 1-3 have little change, which shows that the method of the present invention can obtain pseudo-boehmite products with stable quality.

[0074] In addition, Examples 1-3 were repeated 5 times respectively, and the variation range of the performance parameters of the obtained pseudo-boehmite was less than 1%, which indicated that the method of the present invention had good repeatability.

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Abstract

The invention discloses a method for producing pseudo-boehmite by adopting an inorganic membrane reactor. The method comprises a gel forming step, an aging step, a separating and washing step and a drying step. According to the method, the gel forming step comprises the step that a meta-aluminate solution makes contact with mixed gas in the inorganic membrane reactor to generate a reaction product, wherein the mixed gas comprises carbon dioxide gas and one or two of air and nitrogen; the pseudo-boehmite with the stable quality can be produced.

Description

technical field [0001] The invention relates to a method for pseudo-boehmite, in particular to a method for producing pseudo-boehmite by an alkali method. 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 boehmite,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/14
CPCC01F7/142C01P2002/72C01P2006/12C01P2006/14
Inventor 史建公刘志坚张文平张敏宏文建军罗道威史建新蒋绍洋张新军伊红亮钟健李卫红
Owner CHINA PETROLEUM & CHEM CORP
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