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System and method for large-scale preparation of ethylene glycol from synthesis gas

A technology for the synthesis of ethylene glycol, which is applied in the preparation of hydroxyl compounds, organic compounds, carbon monoxide or formate reaction preparation, etc., which can solve the problems of low qualification rate of ethylene glycol products, large number of device series, and large project investment and other problems, to achieve the effect of reducing the steam consumption of ethylene glycol rectification and separation, reducing the project investment, and reducing the project investment

Active Publication Date: 2017-06-20
NANJING DUNXIAN CHEM TECH
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Problems solved by technology

[0020] Syngas-to-ethylene glycol devices at home and abroad have not really realized large-scale devices. There are many device series, large project investment, difficult management, high energy consumption, high operating costs, and low pass rate of ethylene glycol products. Ethylene glycol that completely replaces the petroleum route

Method used

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  • System and method for large-scale preparation of ethylene glycol from synthesis gas
  • System and method for large-scale preparation of ethylene glycol from synthesis gas
  • System and method for large-scale preparation of ethylene glycol from synthesis gas

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Embodiment Construction

[0066] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0067] Such as figure 1 As shown, this embodiment includes esterification process, carbonylation process, carbonylation synthesis gas separation process, dimethyl oxalate separation process, hydrogenation process, ethylene glycol rectification process, ethylene glycol refining process, waste liquid treatment process , Tail gas treatment process, the above processes and main equipment are single-series single-unit, truly realizing the large-scale production of ethylene glycol from syngas.

[0068] Concretely prepare the steps of ethylene glycol as follows:

[0069] (1) Esterification process: complete the reaction...

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Abstract

The invention discloses a system and a method for large-scale preparation of ethylene glycol from synthesis gas. A gas outlet of a methyl alcohol rectification and washing tower is connected to a gas inlet of an esterification tower; heavy components generated by reaction in the esterification tower are conveyed to a carbonylation reactor, and then residual liquid in the esterification tower is discharged; a gas inlet of the carbonylation reactor is connected with a gas outlet of the esterification tower; heavy components generated by reaction in the carbonylation reactor are conveyed to the methyl alcohol rectification and washing tower; after dimethyl oxalate at a material outlet of a dimethyl oxalate rectification and washing tower is heated and gasified, the material outlet of the dimethyl oxalate rectification and washing tower is connected with a gas inlet of a hydrogenation reactor, and then the dimethyl oxalate is discharged from a gas outlet of the hydrogenation reactor; an ethylene glycol purification tower is connected with a material outlet of an ethylene glycol rectification device; a gas outlet of the ethylene glycol rectification device is connected to the esterification tower; waste liquid in the ethylene glycol rectification device is discharged. The series number of devices is decreased, the number of sets of equipment is decreased, the engineering investment is reduced, generation of byproducts is reduced, and consumption is reduced.

Description

technical field [0001] The present invention relates to a H 2 A method for preparing ethylene glycol from CO synthesis gas, in particular relates to a system and method for preparing ethylene glycol from large-scale synthesis gas. Background technique [0002] Catalyst preparation, process package design, engineering implementation, and process operation indicators of the syngas-to-ethylene glycol process route at home and abroad have gradually matured, but in the case of large-scale syngas-to-ethylene glycol units, reduced engineering investment, energy saving and reduced There are many problems in terms of consumption and further improvement of product quality. [0003] The currently implemented tubular carbonylation reactors and hydrogenation reactors limit the development of large-scale ethylene glycol. [0004] Current status of the existing tubular carbonylation reactors: the carbonylation reactors currently in operation and under design are all tubular reactors, and...

Claims

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Application Information

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IPC IPC(8): C07C29/149C07C29/80C07C29/74C07C31/20
CPCC07C29/149C07C29/74C07C29/80C07C67/36C07C201/04C07C31/202C07C69/36C07C203/00
Inventor 王庆新王揽月
Owner NANJING DUNXIAN CHEM TECH
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