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Preparation method of synthetic gas required by glycol synthesis

A synthesis gas and ethylene glycol technology, applied in the preparation of organic compounds, preparation of hydroxyl compounds, chemical instruments and methods, etc., can solve the problem that the ratio cannot meet the needs of ethylene glycol production, etc.

Inactive Publication Date: 2012-08-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that there is H in the synthesis gas of the shift reactor in the prior art. 2 The ratio of / CO cannot meet the needs of ethylene glycol production, and provide a new method for the preparation of synthesis gas required for the synthesis of ethylene glycol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The crude gas from the coal-water slurry gasification process is divided into two parts, the first part enters the shift furnace for conversion, so that the crude gas is converted into 2 and H 2 Logistics I. Among them, the wet basis molar content of CO in raw raw gas is 18.8%, H 2 The wet basis molar content is 13.6%. The inlet temperature of the shift furnace is 235°C, the reaction pressure is 4.6MPa(A), and the space velocity is 3500 -1 hour, the water-gas ratio is 1.4, and the temperature of the gas exiting the converter is 392°C. The stream I is mixed with the second part of the gas raw material to obtain the synthesis gas required for the synthesis of ethylene glycol. The second part of gas feedstock gas accounts for 49.9% (volume ratio) of the total gas volume of crude gas. The wet basis content of CO in the mixed gas is 10.79%, H 2 Moisture basis content is 21.56%, H 2 / CO=1.998, meeting the requirements of ethylene glycol synthesis process.

Embodiment 2

[0018] The crude gas from the coal-water slurry gasification process is divided into two parts, the first part enters the shift furnace for conversion, so that the crude gas is converted into 2 and H 2 Logistics I. Among them, the wet basis molar content of CO in raw raw gas is 17.6%, H 2 The wet basis molar content is 14.7%. The inlet temperature of the shift furnace is 235°C, the reaction pressure is 4.9MPa(A), and the space velocity is 3800 -1 hour, the water-gas ratio is 1.4, and the temperature of the gas exiting the converter is 380°C. The stream I is mixed with the second part of the gas raw material to obtain the synthesis gas required for the synthesis of ethylene glycol. The second part of gas feedstock gas accounts for 53.5% (volume ratio) of the total gas volume of crude gas. The wet basis content of CO in the mixed gas is 10.74%, H 2 Moisture basis content is 21.59%, H 2 / CO=2.01, meeting the requirements of ethylene glycol synthesis process.

Embodiment 3

[0020] The crude gas from the coal-water slurry gasification process is divided into two parts, the first part enters the shift furnace for conversion, so that the crude gas is converted into 2 and H 2 Logistics I. Among them, the wet basis molar content of CO in raw raw gas is 20.03%, H 2 The wet basis molar content is 12.55%. The inlet temperature of the shift furnace is 240°C, the reaction pressure is 4.3MPa(A), and the space velocity is 3000 -1 hours, the water-gas ratio is 1:4, and the temperature of the gas exiting the converter is 409°C. The stream I is mixed with the second part of the gas raw material to obtain the synthesis gas required for the synthesis of ethylene glycol. The second part of gas feedstock gas accounts for 46.6% (volume ratio) of the total gas volume of crude gas. The wet basis content of CO in the mixed gas is 10.89%, H 2 Moisture basis content is 21.69%, H 2 / CO=1.992, meeting the requirements of ethylene glycol synthesis process.

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Abstract

The invention relates to a preparation method of a synthetic gas required by glycol synthesis, which mainly solves the problem that the proportion of H2 to CO in the synthetic gas from a converting reactor cannot satisfy the production need of glycol existing in the prior art. The method comprises the following steps: a) using water gas as a raw material, dividing the raw material into two parts, letting the first part enter into the converting reactor to partially convert the water gas into a material flow I containing CO2 and H2; and b) mixing the material flow I with the second part of the raw material to obtain the synthetic gas required by glycol synthesis; wherein the technical scheme that the first part of the raw material accounts for 40-60 % of the total volume of the raw material well solves the problem. Thus the method can be utilized in the industrial production of the synthetic gas required by glycol synthesis.

Description

technical field [0001] The invention relates to a method for preparing synthesis gas required for synthesizing ethylene glycol. Background technique [0002] Ethylene glycol (EG), also known as glycol, is an important organic chemical raw material, mainly used in the production of polyethylene terephthalate, unsaturated polyester resin and antifreeze, etc., in chemical production and daily life has a wide range of applications. In recent years, the world's polyester industry has developed rapidly, and the demand for EG is increasing day by day. [0003] The traditional ethylene glycol production method is to use petroleum as raw material, ethylene oxide is obtained by catalytic oxidation of ethylene, and then ethylene oxide is hydrated to generate ethylene glycol. However, my country's energy structure is "poor in oil and rich in coal". The shortage of oil has caused a serious shortage of domestic ethylene glycol supply, while the demand for ethylene glycol has maintained ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02C01B3/12C07C31/20C07C29/152
Inventor 李勇王江义王红石锋周莹董万霞
Owner CHINA PETROLEUM & CHEM CORP