Abstract
Ethyl acetate (EtAc) is an important chemical and is normally produced via esterification reaction of acetic acid with ethanol. Due to the thermodynamic limitation of the EtAc esterification system, an energy efficient two-column process which is composed of a reactive-distillation (RD) column and a stripper has been proposed recently1,2 to remove water for yielding high purity EtAc product. Considering recent phenomenal advancement of membrane technology, this study raises a RD–pervaporation (PV) hybrid configuration for producing high purity EtAc with further decreased energy consumption. A side stream with high EtAc purity is drawn from the rectifying section of the RD column, and pervaporation units are applied to remove water for producing high spec EtAc product. The optimized design achieves 13% energy savings compared to the two-column process.2 Based on the optimized RD–PV hybrid process, two different control strategies—the single-point temperature control and the dual-points temperature control—...
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