Radial flow fixed bed catalytic reactor for producing oxalate through CO carbonylation coupling

Abstract

The invention discloses a radial flow fixed bed catalytic reactor for producing oxalate through CO carbonylation coupling. The reactor comprises a cylindrical vessel composed of an upper end socket, acylindrical barrel and a lower end socket in sequence from top to bottom. A reaction gas feeding port, a reaction gas discharging port, a heat exchange medium inlet, a heat exchange medium outlet, acatalyst feeding port and a catalyst discharging port are formed in the outer portion of the cylindrical vessel. The catalytic bed layer is divided into a heat insulation area and a heat exchange areafrom inside to outside, and the heat exchange area is provided with multiple groups of heat exchange tubes which are concentrically arranged in two rows as a group. The radial flow fixed bed catalytic reactor for producing oxalate through CO carbonylation coupling has the characteristics of uniform distribution of reaction gas along the axial direction, reasonable bed layer temperature distribution, high catalyst utilization rate, small reactor pressure drop and the like, is suitable for a reaction for producing oxalate through carbonylation coupling, and is also suitable for other exothermicgas-solid phase catalytic reactions.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction engineering, and in particular relates to a reactor for exothermic catalytic reaction, in particular to a radial flow fixed-bed catalytic reactor for carbonylation coupling of CO to generate oxalate . Background technique [0002] Ethylene glycol is an important raw material for the synthesis of polyester. The ethylene glycol industry mainly has ethylene routes and coal-based synthesis gas routes. Among them, the coal-based synthesis gas route is in line with my country's resource development strategy and is developing particularly rapidly. The coal-based synthesis gas route put into production mostly adopts the oxalate method. The first step is the reaction of nitrite and carbon monoxide to form oxalate and nitric oxide, and the second step is the partial hydrogenation of oxalate to produce ethylene glycol. [0003] The reaction temperature of CO carbonylation coupling to generate dime...

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Problems solved by technology

[0015] The purpose of this invention is to provide a radial flow fixed bed catalytic reactor for carbonylation coupling of CO to generate oxalate, which is a centrifugal flow radial reactor with special arrangement of heat exchange tubes, so that the bed The layer fluid is evenly distributed while improving the heat transfer effect and the problem of uneven bed temperature distribution. At the same time, the structure is relatively simple, which is suitable for large-scale processing, manufacturing and transportation of the reaction device.

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