Energy-saving and yield-improving production method of ethyl acetate

Abstract

The invention discloses an energy-saving and yield-improving production method of ethyl acetate. The production method comprises the following steps of: heating and gasifying raw material acetic acid and ethanol and then feeding into a reaction kettle to react; recovering a bottom material in the reaction kettle according to a certain proportion with the total amount of fed materials to an evaporator to perform flash evaporation, wherein most of ester and alcohol in the bottom material which is subjected to flash evaporation are returned to the bottom of an esterification tower, and the ester phase of the rest bottom material is a large amount of acid and a part of water and is discharged through a pump from the bottom of the evaporator; conveying the treated bottom material to a heat exchanger through the pump for heating and then directly feeding into a dehydration tower to perform dehydration treatment; performing azeotropic distillation and recovering azeotrope formed by water and a dehydrant from the top of the esterification tower; condensing to split phase; discharging the water phase to a recovery tower for treatment; reflowing the oil phase to a dehydration tower; and newly returning acid which is discharged from the bottom of the dehydration tower to the reaction kettle to participate in esterification reaction. After the process is implemented, the water in the kettle is effectively reduced to further reduce the corrosion condition of the equipment, the energy of an esterification section is saved by 5-10 percent, the capacity can be increased by 10-20 percent, and the economic benefit is obvious.

Description

technical field [0001] The invention provides a production method for energy-saving and production-increasing ethyl acetate. Specifically, by transforming the traditional esterification process, an evaporator and a dehydration tower are added, and the reaction kettle liquid is extracted and circulated to effectively remove the moisture in the reaction kettle. , while reducing the reflux and evaporation of the esterification tower to achieve the purpose of energy saving and production increase. Background technique [0002] Ethyl acetate is also called ethyl acetate. Pure ethyl acetate is a colorless, transparent liquid with a pungent odor. It is a fine chemical product with a wide range of uses. It has excellent solubility, quick drying, and a wide range of uses. It is a very important organic chemical raw material and extremely Good industrial solvent. [0003] The traditional ethyl acetate production process is the esterification method: acetic acid and alcohol are used ...

AI Technical Summary

Problems solved by technology

Therefore, in this traditional ethyl acetate production method, the energy consumption of the product cannot be further effectively reduced, and the production capacity of the monoesterification tower is also limited by the operating load of the esterification tower, which cannot be increased.

Images