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Enhanced micro-interface reaction system and method for preparing ethylene glycol by ethylene oxide method

A technology of ethylene oxide method and interface reaction, applied in chemical instruments and methods, chemical/physical/physical-chemical reactors, chemical/physical/physical-chemical stationary reactors, etc., can solve the problem of ethylene oxide and water sources. Inability to obtain sufficient mixing, low liquid hourly space velocity, and high reaction pressure, achieving the effects of simple operation, improved application surface, and high purity

Pending Publication Date: 2021-04-30
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

[0006] The first object of the present invention is to provide a reaction system for preparing ethylene glycol by the ethylene oxide method. The enhanced micro-interface reaction system is provided with a micro-interface unit on the outside of the stirred tank and inside the first reactor and the second reactor. The carbon dioxide is efficiently broken into micron-sized bubbles through the micro-interface generator, and dispersed into the liquid raw material to form a micro-interface system, which increases the mass transfer area of ​​the phase boundary between ethylene oxide and the water source, thus solving the problem of environmental problems in the prior art Oxygen and water cannot be fully mixed inside the reactor, resulting in high reaction pressure, high hydrogen-ester ratio, and low liquid hourly space velocity

Method used

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  • Enhanced micro-interface reaction system and method for preparing ethylene glycol by ethylene oxide method
  • Enhanced micro-interface reaction system and method for preparing ethylene glycol by ethylene oxide method
  • Enhanced micro-interface reaction system and method for preparing ethylene glycol by ethylene oxide method

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Embodiment 1

[0060] refer to figure 1 Shown is the reaction system for preparing ethylene glycol by the ethylene oxide method of the embodiment of the present invention, which mainly includes a stirred tank 20, a first reactor 13, and a second reactor 21, and the side of the stirred tank 20 is provided with an external The micro-interface unit is composed of several external micro-interface generators 19, and the external micro-interface generators 19 are arranged in sequence from top to bottom, and the bottom surface and the top surface between adjacent external micro-interface generators 19 There are connecting rods for fixing between them, and the number of external micro-interface generators 19 is preferably 4.

[0061] The main pipe leading to the external micro-interface unit is connected to the ethylene oxide feed pipe and two branch pipes of the water source feed pipe at the same time, and the water source feed pipe is connected to the external micro-interface generator through the...

Embodiment 2

[0073] refer to figure 2 As shown, this embodiment is different from Embodiment 1 only in the number of external micro-interface generators 19, the temperature and pressure settings of the system, and the number of micro-interface generators in this embodiment is 4, and every 2 is One group is divided into two groups, and the two groups are arranged sequentially from top to bottom. Two micro-interface generators 131 in each group are connected in series, and the two groups are connected in parallel. The system temperature is set to 95°C, and the pressure is set to 2.0 MPa. The output of ethylene glycol was detected, and the conversion rate of ethylene oxide was calculated to be 97.5%.

Embodiment 3

[0075] refer to image 3 As shown, this embodiment is different from Embodiment 1 only in the number of external micro-interface generators 19, the temperature and pressure settings of the system, the number of micro-interface generators in this embodiment is 3 and from top to bottom Arranged in sequence, the micro-interface generators are connected in parallel with each other, the system temperature is set to 86° C., and the pressure is set to 1.4 MPa. The output of ethylene glycol was detected, and the conversion rate of ethylene oxide was calculated to be 96.5%.

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Abstract

The invention provides an enhanced micro-interface reaction system and method for preparing ethylene glycol by an ethylene oxide method, the enhanced micro-interface reaction system comprises a first reactor, a second reactor and a stirring kettle, and the stirring kettle is filled with a NaHCO3 agent material; a micro-interface unit is arranged on the outer side of the stirring kettle and is formed by arranging a plurality of external micro-interface generators; a main pipeline introduced into the micro-interface unit is connected with an ethylene oxide feeding pipeline and two branch pipelines of a water source pipeline at the same time, ethylene oxide is introduced into the micro-interface unit from the gas source conveying pipeline, and a water source enters the micro-interface unit to be used for breaking ethylene oxide gas into micron-sized micro-bubbles; the micro-interface units are arranged on the outer side of the stirring kettle and in the reactor, so that ethylene oxide is crushed into micro-bubbles before reacting with the water source, and the phase boundary mass transfer area between the ethylene oxide and the water source is increased.

Description

technical field [0001] The invention relates to the field of ethylene glycol preparation, in particular to an enhanced micro-interface reaction system and method for preparing ethylene glycol by an ethylene oxide method. Background technique [0002] Ethylene glycol (EG) is the simplest and most important aliphatic diol, a colorless, odorless, sweet liquid that can be mixed with water in any proportion. Ethylene glycol has a wide range of uses in industry, and can be used to produce polyethylene terephthalate (raw material for synthetic polyester fibers and polyester plastics), and to produce other polyester resins, unsaturated polyester resins, Non-ionic surfactants, ethanolamine, and explosives; high-purity ethylene glycol can be used to configure antifreeze and thawing agents for cooling systems in automobiles, aviation industries, and instrumentation industries, as well as to produce solvents, lubricants, softeners, and enhancers. Plastics, etc.; Ethylene glycol is also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/10B01J19/00B01J19/18B01F3/04B01D3/14
CPCC07C29/106B01J19/0053B01J19/0093B01J19/18B01D3/14B01F23/29C07C31/202
Inventor 张志炳周政李磊张锋孟为民王宝荣杨高东罗华勋田洪舟杨国强曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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