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[Chemical Knowledge]：Production method and process of ethylene glycol ethyl ether ethyl ester

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The manufacturing method

of ethylene glycol ethyl ether ethyl ester (Ethylene Glycol Monoethyl Ether Acetate, referred to as EGMEA) is an important chemical raw material, widely used in coatings, inks, cleaning agents, printing and dyeing auxiliaries and other fields. This article will introduce the manufacturing method of ethylene glycol ethyl ether ethyl ester.

1. Manufacturing Principle

Ethylene glycol ethyl ether ethyl ester is prepared by esterification of ethylene glycol and ethyl acetate under the action of acidic catalyst. The reaction equation is as follows:

CH3COOC2H5 HOCH2CH2OH → CH3COOCH2CH2OCH2CH3 H2O

2. manufacturing steps

1. Ingredients
according to a certain proportion of ethylene glycol and ethyl acetate into the reaction kettle, while adding the right amount of acid catalyst.

2. heating reaction
open the reaction kettle heating device, control the reaction temperature in a certain range, the ethylene glycol and ethyl acetate esterification reaction.

3. Dehydration
During the reaction process, a certain amount of water will be generated, which needs to be discharged in time through the water separator to ensure the smooth progress of the reaction.

4. Post-treatment
After the reaction, the reaction solution is post-treated, including neutralization, washing, distillation and other operations, to obtain pure ethylene glycol ethyl ether product.

3. precautions

1. Control the reaction temperature: Too high or too low temperature will affect the reaction, and the reaction temperature needs to be strictly controlled.
2. Timely drainage: The water generated by the reaction needs to be discharged in time to avoid affecting the reaction.
3. Safe operation: Pay attention to safety during the manufacturing process to avoid leakage, fire and other safety accidents.

4. Application

Ethylene glycol ethyl ether ethyl ester as an important raw material for chemical production, has a wide range of applications in coatings, inks, cleaning agents, printing and dyeing auxiliaries and other fields. At the same time, it can also be used as a solvent, a reaction medium, etc.

In short, the manufacturing method of ethylene glycol ethyl ether is not complicated, but it is necessary to pay attention to safety during the operation and strictly control the reaction conditions to ensure the quality and yield of the product.

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