Alkali treatment method and treatment device for spent aluminum isopropoxide catalyst

Abstract

The invention relates to the field of petrochemical engineering, in particular to an alkaline treating method of an aluminium isopropoxide waste catalyst and a treating device thereof. According to the method, strong alkaline solutions of sodium hydrate (or potassium hydrate) and the like are taken as alkaline hydrolysis extractants, alkaline hydrolysis extracting is conducted on the input isopropanol aluminum waste catalyst, and separation is conducted on an organic phase and an inorganic phase; useful parts of the separated organic phase are further recovered; pseudo-boehmite with high addedvalue is obtained after the PH value of the separated inorganic phase is adjusted through CO2, and carbonate crystals can be recovered by filtering liquid through a manner of condensed crystallization. By means of the method, the treating problem of wasted catalysts in the reduction production process of unsaturated aldehydes and ketones is solved, certain benefits can be achieved, and the greendegree of the reduction production process of the unsaturated aldehydes and ketones taking the aluminium isopropoxide as a catalyst is improved.

Description

[0001] (1) Technical field [0002] The invention relates to the field of petrochemical industry, in particular to an alkali treatment method for waste aluminum isopropoxide catalyst and a treatment device thereof. [0003] (2) Background technology [0004] As an important chemical raw material, aluminum isopropoxide is often used as a crosslinking agent for adhesives because of its unique physical and chemical properties. agent. In addition, in the field of organic synthesis, aluminum isopropoxide is a highly selective aldehyde and ketone reduction catalyst for unsaturated aldehydes and ketones. Compared with other reduction catalysts, its advantages are very obvious. When reducing unsaturated carbonyl compounds , has high selectivity to carbonyl, the reaction conditions are relatively mild, the reaction is very smooth, and the -NO in the compound 2 , C=C, -COOR and other groups have almost no effect. At the same time, the production process of aluminum isopropoxide is sim...

AI Technical Summary

Problems solved by technology

At the same time, some by-products and polymers will accumulate during the reaction, so that the deactivated aluminum isopropoxide is mixed with these by-products and polymers to form a very viscous aluminum isopropoxide spent catalyst , for this aluminum-containing mixed product, the industry can only deal with it by incineration at present

The use of incineration treatment not only leads to the loss of useful substances in the mixed product, but also produces more solid alumina residues and relatively large odors, which increases the difficulty of further treatment and also leads to related environmental issues.

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