Manufacturing Method of Ethylene Glycol Butyl Ether Acetate
Ethylene Glycol Butyl Ether Acetate (EBAC) is an important raw material for the production of chemicals, which is widely used in the fields of coatings, printing inks, cleaning agents and so on. This article will introduce a common manufacturing method of ethylene glycol butyl ether acetate.
I. Preparation of raw materials
The main raw materials for manufacturing glycol butyl ether acetate are glycol butyl ether and acetic acid. Among them, the glycol butyl ether should have low moisture and alcohol content to ensure the quality and yield of the product. Acetic acid should be selected from industrial grade acetic acid with high purity.
II. Reactor setup
Clean the reactor, add the quantitative amount of glycol butyl ether and catalyst, turn on the stirrer, and keep the appropriate stirring speed. At the same time, pass cooling water to control the reaction temperature within the appropriate range.
Three, esterification reaction
Under the condition of stirring and cooling, slowly add acetic acid dropwise, so that the glycol butyl ether and acetic acid fully react. Control the rate of titration to keep the reaction temperature stable. After the acetic acid is added, continue to stir for a certain time to ensure the reaction is complete.
IV. Neutralization and washing
After the reaction is finished, add a quantitative amount of alkaline solution to the reaction kettle to neutralize the remaining acetic acid. Then, transfer the reaction solution to a dispensing funnel and wash it with water several times to remove the catalyst and salt impurities in it.
V. Distillation and purification
The washed ethylene glycol butyl ether acetate solution is distilled to collect the product of suitable fraction. The vacuum degree and distillation temperature should be controlled during distillation to avoid decomposition of the product and the occurrence of side reactions.
Sixth, product quality testing
The quality of ethylene glycol butyl ether acetate obtained by distillation is tested, including purity, moisture, acid value and other indicators. The products that meet the standard are packed and put into storage, and the products that do not meet the standard need to be processed back to the furnace or discarded.
Above is a common manufacturing method of 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, and comply with relevant laws and regulations and standard requirements.
