Preparation method of highly pure pseudoboehmite

Abstract

The invention provides a preparation method of highly pure pseudoboehmite. The method comprises the following steps: 1, alkoxylaluminum preparation; 2, filtering; 3, a hydrolysis reaction; 3, alcohol separation; 4, ageing and alcohol distillation; and 6, filtering, and drying for preparing the highly pure pseudoboehmite. The pseudoboehmite product prepared in the invention has the advantages of low impurity content, concentrated pore distribution and good stability. The preparation method has the advantages of environmental protection, no discharge of three wastes, and realization of recycling of the recovered alcohol and solvent after treatment, and the obtained product can be widely applied to catalytic reforming and catalytic hydrogenating carriers.

Description

technical field

[0001] The invention belongs to the field of catalyst materials, in particular to a preparation method of high-purity pseudo-boehmite. Background technique

[0002] Pseudo-boehmite, also known as pseudo-boehmite, is a kind of aluminum hydroxide with fine particles, incomplete crystallization, and thin wrinkled sheets. Its water-containing state is a thixotropic gel with specific surface High, large pore volume and other characteristics. It can be used as the raw material for the production of catalyst carrier and activated alumina, as well as the molding binder for molecular sieves, silicate refractory products, etc., and the catalyst for the production of ethylene and ethylene oxide by alcohol dehydration. The product γ-Al calcined at 400-700℃ 2 o 3 Widely used as catalyst carrier, catalyst and adsorbent, etc.; calcined at 1100-1200°C to obtain nano-sized γ-Al 2 o 3 , widely used as coating additives, high-grade ceramics, high-efficiency catalysts for p...

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