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
CN105347374BActive Publication Date: 2017-05-24CHINA PETROLEUM & CHEM CORP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-05-24

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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.
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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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