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Micro-interface enhanced reaction system and process for preparing ethylene glycol based on ethylene hydration method

A technology of ethylene hydration and reaction system, which is applied in the preparation of hydroxyl compounds, hydrolysis, and organic compounds. It can solve the problems of energy waste, lower reaction rate of gas-liquid system, lower conversion rate of ethylene glycol, etc., and achieve enhanced transmission. quality, increase the contact area, improve the conversion rate and efficiency

Pending Publication Date: 2021-03-12
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] First, when the gas containing ethylene oxide is in contact with water, the gas and liquid are mixed, resulting in larger and more bubbles. Due to the large number of bubbles, the gas and liquid cannot be fully mixed, reducing the conversion of ethylene glycol At the same time, the reaction rate of the entire gas-liquid system is reduced
[0011] Second, the process of contacting the gas containing ethylene oxide with water needs to be carried out under high temperature and high pressure conditions, which causes waste of energy

Method used

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  • Micro-interface enhanced reaction system and process for preparing ethylene glycol based on ethylene hydration method

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Experimental program
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Effect test

Embodiment 1

[0090] Ethylene glycol is produced using the system and process described above, wherein:

[0091] The temperature of the reactor is 60° C., and the pressure inside the reactor is 1 atm;

[0092] The feed temperature of ethylene gas and oxygen is 168°C;

[0093] The gas-liquid ratio in the micro-interface generator is 700:1.

[0094] After testing, after using the system and process, the conversion rate of ethylene glycol is 92%.

[0095] The reaction time is 13h.

Embodiment 2

[0097] Ethylene glycol is produced using the system and process described above, wherein:

[0098] The temperature of the reactor is 70° C., and the pressure inside the reactor is 1.1 atm;

[0099] The feed temperature of ethylene gas and oxygen is 168°C;

[0100] The gas-liquid ratio in the micro-interface generator is 700:1.

[0101] After testing, after using the system and process, the conversion rate of ethylene glycol is 93%.

[0102] The reaction time is 13h.

Embodiment 3

[0104] Ethylene glycol is produced using the system and process described above, wherein:

[0105] The temperature of the reactor is 80° C., and the pressure inside the reactor is 1.2 atm;

[0106] The feed temperature of ethylene gas and oxygen is 168°C;

[0107] The gas-liquid ratio in the micro-interface generator is 700:1.

[0108] After testing, after using the system and process, the conversion rate of ethylene glycol is 92%. The reaction time is 12.5h.

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Abstract

The invention relates to a micro-interface enhanced reaction system and process for preparing ethylene glycol based on an ethylene hydration method. The micro-interface enhanced reaction system comprises a reactor, an ethylene oxide generator, a micro-interface generator and the like. According to the invention, gas containing ethylene oxide is crushed by the micro-interface generator to form micron-sized bubbles, and the micron-sized bubbles are mixed with deionized water to form a gas-liquid mixture, so that the phase interface area of a gas phase and a liquid phase is increased, and the effect of enhancing mass transfer within a lower preset operation condition range is achieved; and the micron-sized bubbles can be fully mixed with deionized water to form a gas-liquid mixture, and the gas-liquid two phases are fully mixed, so that the deionized water in the system can be in full contact with gas containing ethylene oxide, the reaction efficiency of the system is effectively improved, and the conversion rate of ethylene glycol is increased.

Description

technical field [0001] The invention relates to the technical field of ethylene glycol preparation, in particular to a micro-interface strengthening reaction system and process for preparing ethylene glycol based on ethylene hydration. Background technique [0002] Ethylene glycol is an important chemical raw material. Since it was found to react with terephthalic acid to form polydimethyl terephthalate, which can be used as a raw material for polyester fibers and polyester plastics, the amount of ethylene glycol has been greatly increased. Increase. [0003] At present, ethylene glycol is mainly used to manufacture polyester fibers, and its consumption accounts for more than 40% of the total consumption of ethylene glycol; secondly, it is used as the main raw material of antifreeze, and the consumption accounts for 35% of the total consumption; other aspects, such as as chemical reagents, Ethylene glycol is mainly used as a stationary liquid in gas chromatography for the a...

Claims

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Application Information

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IPC IPC(8): C07C29/10C07C31/20
CPCC07C29/106C07D301/10C07C31/202C07C29/10C07C31/20
Inventor 张志炳孟为民周政王宝荣杨高东罗华勋张锋李磊杨国强田洪舟曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD