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Amorphous aluminum hydroxide and preparation method and preparation device thereof

A technology for aluminum hydroxide and preparation device, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of low product yield and low production capacity, and achieve the effects of improving purity, low cost and simple process

Active Publication Date: 2017-01-18
中铝山东新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in the reproduction process of amorphous aluminum hydroxide, the reaction temperature, CO 2 The speed requirement of the air inlet is relatively strict, and a little carelessness will lead to lower product yield and lower production capacity per unit.

Method used

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  • Amorphous aluminum hydroxide and preparation method and preparation device thereof
  • Amorphous aluminum hydroxide and preparation method and preparation device thereof
  • Amorphous aluminum hydroxide and preparation method and preparation device thereof

Examples

Experimental program
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Embodiment 1

[0047] See attached figure 1 And attached figure 2 , the preparation method of the amorphous aluminum hydroxide provided by the embodiment of the present invention comprises the following steps:

[0048] Step S11: adding an acidic aluminum salt solution to the carbonized slurry of pseudo-boehmite to obtain a mixed solution, the pH of the mixed solution ranges from 7 to 8;

[0049] Step S12: Stir the mixed solution for a set time to obtain a stirred mixed solution;

[0050] Step S13: if the pH of the stirred mixed solution ranges from 7 to 8, perform aging or aging;

[0051] Step S14: Separating and washing the aged or aged mixed solution to obtain a slurry of amorphous aluminum hydroxide;

[0052] Step S15: performing solid-liquid separation on the slurry of amorphous aluminum hydroxide to obtain amorphous aluminum hydroxide.

[0053] In this embodiment, take 6m 3 The carbonized slurry of pseudo-boehmite is placed in a volume of 20m 3 In the enamel synthesis kettle, in th...

Embodiment 2

[0059] See attached image 3 And attached Figure 4 , different from the preparation method of amorphous aluminum hydroxide provided in Example 1 of the present invention, in the preparation method of amorphous aluminum hydroxide provided in Example 2 of the present invention, the raw materials used to prepare the mixed solution are concentrated A carbonized slurry of pseudo-boehmite, the preparation method of the concentrated carbonized slurry of pseudo-boehmite comprises the following steps: performing solid-liquid separation on the carbonized slurry of pseudo-boehmite to obtain a wet filter cake; The carbonized slurry of pseudo-boehmite of gibbous is beaten to the wet filter cake to obtain the concentrated carbonized slurry of pseudo-boehmite.

[0060] The preparation method of the amorphous aluminum hydroxide provided by the second embodiment of the present invention comprises the following steps:

[0061] Step S21: adding an acidic aluminum salt solution to the concentr...

Embodiment 3

[0070] See attached Figure 5 And attached Figure 6 , different from the preparation method of amorphous aluminum hydroxide provided in Example 1 or Example 2 of the present invention, in the preparation method of amorphous aluminum hydroxide provided in Example 3 of the present invention, the raw material used to prepare the mixed solution It is a mixture of carbonized slurry of pseudo-boehmite and concentrated carbonized slurry of pseudo-boehmite. The preparation method of the concentrated pseudo-boehmite carbonized slurry comprises the following steps: performing solid-liquid separation on part of the pseudo-boehmite carbonized slurry to obtain a wet filter cake; using the pseudo-boehmite pseudo-boehmite The carbonized slurry of the wet filter cake is beaten to obtain the carbonized slurry of the concentrated pseudo-boehmite; Mix to get a mixture of the two.

[0071] The preparation method of the amorphous aluminum hydroxide provided in Example 3 of the present inventio...

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Abstract

The invention discloses amorphous aluminum hydroxide and a preparation method and a preparation device thereof, and belongs to the technical field of aluminum compounds. The preparation method comprises the steps: adding an acidic aluminum salt solution into a pseudoboehmite carbonized slurry and / or a concentrated pseudoboehmite carbonized slurry, to obtain a mixed solution, wherein the pH value range of the mixed solution is 7-8; stirring the mixed solution and sustaining for a set time, to obtain a mixed solution after stirring; if the pH value range of the mixed solution after stirring is 7-8, aging or maturing; discharging, separating and washing the aged or matured mixed solution, to obtain an amorphous aluminum hydroxide slurry; and carrying out solid-liquid separation of the amorphous aluminum hydroxide slurry to obtain amorphous aluminum hydroxide. The device comprises a first container, a second container, a stirring device and a pH detection device. The amorphous aluminum hydroxide has no crystal characteristic peaks under X diffraction conditions. The method and the device can improve the finished product rate of the amorphous aluminum hydroxide and the machine-hour productivity.

Description

technical field [0001] The invention relates to the technical field of aluminum-related compounds, in particular to an amorphous aluminum hydroxide, its preparation method and preparation device. Background technique [0002] Amorphous aluminum hydroxide is a substance without any crystal characteristic peaks under X-ray diffraction. It is mainly used in alkali-free spray quick-setting cement. Its main function is to adjust the setting time of quick-setting cement and increase the strength of quick-setting cement. Alkali-free spray quick-setting cement has been widely used abroad, mainly for surface spraying of large culverts, slopes, and deep pits. It has the advantages of high work efficiency, short construction period, uniform construction surface and high strength. [0003] In the prior art, in the reproduction process of amorphous aluminum hydroxide, the reaction temperature, CO 2 The speed requirement of gas feeding is relatively strict, and a little carelessness wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
CPCC01F7/02C01P2002/72C01P2006/80
Inventor 蔡转红崔宝刘延东宋艳杰腾龙
Owner 中铝山东新材料有限公司