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[Chemical Knowledge]：Manufacturing method and process flow of ethylene glycol butyl ether acetate

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Manufacturing method

of ethylene glycol butyl ether acetate Ethylene glycol butyl ether acetate (EBAC) is an important raw material for chemical production, which is widely used in coatings, printing inks, cleaning agents and other fields. This article will introduce a common manufacturing method of ethylene glycol butyl ether acetate.

1. Raw Materials Preparation

The main raw materials for the manufacture of ethylene glycol butyl ether acetate are ethylene glycol butyl ether and acetic acid. Among them, ethylene glycol butyl ether should have lower moisture and alcohol content to ensure product quality and yield. Industrial grade acetic acid with high purity shall be selected as acetic acid.

2. the reaction kettle set

to clean the reaction kettle, add a certain amount of ethylene glycol butyl ether and catalyst, open the stirrer, maintain the appropriate stirring speed. At the same time, cooling water was introduced to control the reaction temperature within a suitable range.

3. Esterification Reaction

While stirring and cooling, acetic acid was slowly added dropwise to sufficiently react ethylene glycol butyl ether with acetic acid. The dropping rate was controlled to keep the reaction temperature stable. After the addition of acetic acid, continue to stir for a certain period of time to ensure that the reaction is complete.

4. neutralization and water washing

After the reaction is completed, a quantitative amount of lye is added to the reactor to neutralize the remaining acetic acid. Then, the reaction solution was transferred to a separatory funnel and washed with water several times to remove the catalyst and salt impurities therein. The washed ethylene glycol butyl ether acetate solution was distilled

the 5. distillation and purification

to collect the appropriate fractions of product. The vacuum degree and distillation temperature should be controlled during the distillation process to avoid the decomposition of the product and the occurrence of side reactions.

6. product quality testing

for the distillation of ethylene glycol butyl ether acetate quality testing, including purity, moisture, acid value and other indicators. Products that meet the standards are packaged and put into storage, and products that do not meet the standards need to be recycled or discarded.

above is a common manufacturing method of ethylene glycol butyl ether acetate, the specific operation process needs to strictly control the process parameters to ensure the quality and yield of the product. At the same time, the production process should pay attention to safety and environmental protection, comply with relevant laws, regulations and standards.

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