Oxidizing reactor in bubbling tower of internal circulation for producing aromatic acid

An oxidation reactor and internal circulation technology, applied in chemical instruments and methods, organic chemistry, carboxylate preparation, etc., can solve problems affecting reaction efficiency, complex internal structure of reactor, low oxygen concentration, etc., and achieve good application prospects , Improve the axial oxygen concentration gradient and promote the effect of material circulation
CN101092350AActive Publication Date: 2007-12-26SINOPEC YIZHENG CHEM FIBER
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SINOPEC YIZHENG CHEM FIBER
Publication Date
2007-12-26

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Abstract

This invention relates to an inner circulating bubbling column oxidation reactor for producing aromatic acids. The column is composed of three sections, i.e., a gas-liquid separation section at the upper part, a multi-stage bubbling section at the middle part and a solid-liquid suspension section at the lower part. The multi-stage bubbling section is equipped with 1-5 stage gas distributor and 1-5 stage inner circulating draft-tube. The reactor is free of any moving part inside, and can promote raw material circulation in a certain region in the column, effectively eliminate inadequate mixing zone, and obviously decrease raw material concentration and temperature gradient by synergistic effect of inner circulating draft-tube and gas distributor.
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Description

technical field

[0001] The invention relates to a technical method and a reaction device for preparing aromatic acids by liquid-phase oxidation of aromatic hydrocarbons, in particular to an internal circulation bubble tower oxidation reactor for producing aromatic acids, which belongs to the technical field of chemical equipment. Background technique

[0002] The bubble column reactor is an important device for gas-liquid two-phase or gas-liquid-solid three-phase mass, energy and chemical reactions, and has the characteristics of simple structure and stable operation. The technical method for the preparation of aromatic acids by the liquid-phase oxidation of aromatic hydrocarbons can be industrially used in bubble column reactors, especially for the preparation of terephthalic acid by liquid-phase catalytic oxidation of p-xylene. In recent years, there has been a trend of increasing scale.

[0003] Most commercial-scale terephthalic acid preparation processes use acetic acid...

Claims

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