A kind of preparation method of pseudo-boehmite

A pseudo-boehmite and aluminum hydroxide technology, applied in the direction of alumina/aluminum hydroxide, can solve the problem that the pseudo-boehmite index does not change significantly, increase the load of washing and filtering equipment, and increase the pseudo-boehmite Cost and other issues, to achieve the effect of shortening the growth time, particle integrity, and improving crystallinity
CN104671263BActive Publication Date: 2016-11-23CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2016-11-23

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Abstract

The invention discloses a preparation method of pseudo-boehmite. The method comprises preparing aluminum hydroxide precipitation, aging, washing, and drying, wherein the aging is carried out in the following container: a filter cloth is arranged in the container along the axial direction, so that the aging container is divided into a sandwich area and a central area, and the central area is arranged There is a stirrer, and the negative and positive electrodes that generate the electric field are placed oppositely in the interlayer area, and the aging conditions are controlled. The method can improve the performance of the pseudo-boehmite and reduce the water consumption in the subsequent washing process.
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Description

Technical field

[0001] The present invention involves a preparation method of thin water aluminum stone, which specializes in a preparation method with high -crystalline aluminum and aluminum stone. Background technique

[0002] γ-Al 2 O 3 As a catalytic material, alumina is very widely used in the field of catalytic, especially in the field of catalytic hydrogenation.Preparation γ-al 2 O 3 The usual method is to make thin water aluminum stones first, and then bake at a certain temperature to transform into γ-al 2 O 3 EssenceThere are many ways to prepare thin water aluminum stone, but it is mainly precipitated by acid or alkali method, such as:

[0003] (1) The neutral reaction of aluminum salt and alkaline precipitant, such as aluminum chloride:

[0004] AlCl 3 +3nh 4 Oh → al (oh) 3 +3nh 4 CL

[0005] (2) The complex decomposition reaction of acid aluminum salt and alkaline aluminum acid salt, such as aluminum sulfate:

[0006] AL 2 SO 4 ) 3 +6NAALO 2 +12H 2 O → 8AL (OH) 3 +3A ...

Claims

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