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Process and oxidizing reactor for preparing arylcarboxylic acid by aralkyl oxidization

A technology of aromatic carboxylic acid and reactor, which is applied in the field of aralkyl oxidation to produce aromatic carboxylic acid and oxidation reactor, can solve the problems that the gas capacity cannot be fully satisfied, the mixing of reaction materials is not uniform enough, etc., and achieve the reduction of material consumption and energy consumption, Improved dispersion performance and reduced system resistance

Inactive Publication Date: 2006-03-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] One of the technical problems to be solved in the present invention is to disclose an oxidation reactor for the production of aromatic carboxylic acid by oxidation of aralkyl groups, so as to overcome the defects that the capacity of gas in the prior art cannot fully meet the needs of the reaction and the mixing of materials is not uniform enough;

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  • Process and oxidizing reactor for preparing arylcarboxylic acid by aralkyl oxidization
  • Process and oxidizing reactor for preparing arylcarboxylic acid by aralkyl oxidization
  • Process and oxidizing reactor for preparing arylcarboxylic acid by aralkyl oxidization

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Embodiment Construction

[0023] See figure 1 , the oxidation reactor of the present invention comprises:

[0024] A cylindrical vertical pressure vessel 1 provided with a material inlet device 2;

[0025] A stirring device 3 axially installed in the cylindrical vertical pressure vessel 1, the stirring device 3 includes: an upper airfoil axial flow wide blade located near the middle of the cylindrical vertical pressure vessel 1 Stirring paddle 301, a mid-level modified turbine stirring paddle 302 located near the bottom of the cylindrical vertical pressure vessel 1 and a lower wing-shaped axial-flow narrow-blade stirring paddle 303 located near the bottom of the cylindrical vertical pressure vessel 1 .

[0026] The upper airfoil axial-flow wide-blade impeller 301 adopts an airfoil-shaped axial-flow wide-blade impeller with six high-disc ratio blades 311. The hub is in the center, and the blades 311 and the hub are connected by ribs. The blades 311 are installed on the rotating shaft through the hub. ...

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Abstract

A process and equipment for preparing arylcarboxylic acid by aralkyl oxidization is disclosed. Said equipment is composed of a combined stirrer axially installed in a pressure container, an oxidizing gas inlet unit between the middle layer and lower layer of stirring blades, and multiple baffles vertically arranged on the inner surface of reactor but with gap between baffle and inner surface. Its advantages are high dispersibility of materials, high gas processing power, high productivity, and low consumption of material and energy.

Description

technical field [0001] The present invention relates to a kind of method of aralkyl oxidation producing aromatic carboxylic acid, and the oxidation reactor adopted, specifically, relate to xylene under the action of cobalt, manganese, bromine catalyst, use air or hydrogen peroxide in acetic acid solvent A method for oxidizing p-xylene to terephthalic acid through a gas-liquid phase reaction and a reactor used, in particular to a stirring device in the reactor and a baffle installed in the reactor. Background technique [0002] The oxidation reaction of xylene is a complex reaction. In addition to the main reaction to generate terephthalic acid, there are other side reactions to generate various by-products: such as p-hydroxybenzaldehyde, p-toluic acid and p-tolualdehyde. In addition, acetic acid can be decomposed, and both xylene and solvent acetic acid will partially burn to generate CO, CO 2 and water. The reaction product is crystallized and suspended in the system to f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/255
Inventor 戴干策陈剑佩张家庭沈春银吴民权
Owner CHINA PETROLEUM & CHEM CORP
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