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

A catalytic reactor and oxalate technology, applied in the preparation of carbon monoxide or formate, chemical instruments and methods, organic chemistry, etc., can solve the problem of uneven temperature distribution in the bed, to eliminate temperature differences and improve uniformity performance and prevent overheating

Pending Publication Date: 2020-08-28
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 i

Method used

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

Examples

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Example Embodiment

[0084] Example 1

[0085] 100 thousand tons / year methyl nitrite carbonylation to dimethyl oxalate plant, the reactor adopts such as figure 1 Shown ∏ type methyl nitrite carbonylation fixed-bed radial reactor structure, feed material gas 11640Nm 3 / (m 3 ·H), the composition of raw gas: CO20%, CH 3 ONO 10%, NO 1%, N 2 69%, reaction feed temperature 125°C, heat exchange medium temperature 118°C, reaction temperature less than 140°C, pressure 0.3MPa, reactor diameter 4000mm, catalyst bed axial height 6000mm, bed radial thickness 700mm, of which adiabatic zone The thickness is 160mm, and the thickness of the heat exchange zone is 540mm. The arrangement of the heat exchange tubes in the bed is as follows image 3 As shown, there are 3 groups and 6 rows. The first group has 108 heat exchange tubes in the first row with a tube core radius of 1.06m, and the second row has 108 heat exchange tubes with a tube core radius of 1.11m; the second row in the first row 132 heat exchange tubes wit...

Example Embodiment

[0086] Example 2

[0087] 100 thousand tons / year methyl nitrite carbonylation to dimethyl oxalate plant, the reactor adopts such as figure 2 Shown is the Z-type methyl nitrite carbonylation fixed-bed radial reactor structure, the feedstock gas is 11640Nm 3 / (m 3 ·H), the composition of raw gas: CO20%, CH 3 ONO 10%, NO 1%, N 2 69%, reaction feed temperature 125°C, heat exchange medium temperature 118°C, reaction temperature less than 140°C, pressure 0.3MPa, reactor diameter 4000mm, catalyst bed axial height 6000mm, bed radial thickness 700mm, of which adiabatic zone The thickness is 160mm, and the thickness of the heat exchange zone is 540mm. The arrangement of the heat exchange tubes in the bed is as follows image 3 As shown, there are 3 groups and 6 rows. The first group has 108 heat exchange tubes in the first row with a tube core radius of 1.06m, and the second row has 108 heat exchange tubes with a tube core radius of 1.11m; the second row in the first row 132 heat exchang...

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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...

Claims

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Application Information

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IPC IPC(8): B01J8/02C07C67/36C07C69/36
CPCB01J8/0214B01J8/0285C07C67/36C07C69/36
Inventor 李瑞江朱学栋张琪刘玉兰吴勇强朱子彬黄震尧安嘉元
Owner EAST CHINA UNIV OF SCI & TECH
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