Production device and method of aluminum hydroxide

Abstract

The invention discloses a production device and method of aluminum hydroxide. The production device comprises an inorganic membrane reactor, a meta-aluminate supply unit, a carbon dioxide supply unit and a reaction product storage unit. The meta-aluminate supply unit is connected with a liquid-phase inlet of a shell of the inorganic membrane reactor and used for supplying a meta-aluminate solution to a cavity of the inorganic membrane reactor. The carbon dioxide supply unit is connected with a gaseous-phase inlet of an inorganic membrane assembly of the inorganic membrane reactor and used for supplying carbon dioxide to the inorganic membrane assembly of the inorganic membrane reactor. The meta-aluminate solution and the carbon dioxide are reacted in the inorganic membrane reactor to form a reaction product with the aluminum hydroxide. By means of the aluminum hydroxide obtained through the production device and method, pseudo-boehmite stable in quality can be produced.

Description

technical field

[0001] The invention relates to a production device and method for aluminum hydroxide, in particular to a device and method for producing aluminum hydroxide 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. Pseudo-boehmite has low crystallinity, higher w...

Examples

Embodiment 1

[0073] 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 .

[0074] Table 1

[0075]

[0076] Table 2

[0077] Performance parameters Example 1 Example 2 Example 3 Pore ​​volume V(ml / g) 0.34 0.43 0.50 Specific surface area (m 2 / g)

[0078] The performance parameters of the pseudo-boehmite obtained in Examples 1-3 have little change, which shows that the aluminum hydroxide obtained by the device and method of the present invention can form pseudo-boehmite products with stable quality. In addition, after repeating Examples 1-3 5 times, the variation range of the performance parameters of the obtained pseudo-boehmite is less than 0.5%, which shows that the device and method of the present invention have good repeatability.

technical field

[0001] The invention relates to a production device and method for aluminum hydroxide, in particular to a device and method for producing aluminum hydroxide 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. Pseudo-boehmite has low crystallinity, higher w...

Examples

Embodiment 1

[0073] 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 .

[0074] Table 1

[0075]

[0076] Table 2

[0077] Performance parameters Example 1 Example 2 Example 3 Pore ​​volume V(ml / g) 0.34 0.43 0.50 Specific surface area (m 2 / g)

[0078] The performance parameters of the pseudo-boehmite obtained in Examples 1-3 have little change, which shows that the aluminum hydroxide obtained by the device and method of the present invention can form pseudo-boehmite products with stable quality. In addition, after repeating Examples 1-3 5 times, the variation range of the performance parameters of the obtained pseudo-boehmite is less than 0.5%, which shows that the device and method of the present invention have good repeatability.

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