Process to recover alcohol from an ethyl acetate residue stream

摘要

Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid using a low energy process. The crude ethanol product is separated in a column to produce a distillate stream comprising acetaldehyde and a residue stream comprising ethanol, acetic acid, ethyl acetate and water. The ethanol product is recovered from the residue stream.

主权项

1. A process for producing ethanol comprising:
providing a crude ethanol product stream comprising ethanol, ethyl acetate, acetaldehyde, and water; separating at least a portion of the crude ethanol product stream in a first distillation column to form a first distillate comprising acetaldehyde and a first residue comprising ethanol, ethyl acetate and water; separating at least a portion of the first residue to form an organic stream comprising ethyl acetate and ethanol and an aqueous stream comprising water; and separating the organic stream in a second distillation column to form a second distillate comprising ethyl acetate and a second residue comprising ethanol.