A Study of Mass-Transfer in the Extraction of Impurities from Ethanol Aqueous Solution by Carbon Dioxide as a Solvent

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Toru Takatsuka²  Tsunehisa Muto¹  Seiya Hirohama²  Sinji Miyamoto¹ 

[1] Idemitu Petrochemical Co.;Chiyoda Corp.

关键词: Supercritical Fluid;    Extraction;    Mass Transfer;    Ethanol;    Fusel Oil;   

DOI  :  10.1252/jcej.27.107

来源: Maruzen Company Ltd

【 摘 要 】

References(20)Trace amounts of acetaldehyde, ethyl acetate, isoamyl alcohol, n-propanol and methyl ethyl ketone were effectively extracted and removed from the ethanol aqueous solution by carbon dioxide as solvent with countercurrent contractors. The experiments were carried out at 298.2 K and 7.0 MPa or 303.2 K and 7.5 MPa with solvent-to-feed ratios from 1.3 to 5.0 mol/mol. The concentration of feed ethanol aqueous solution was 20 mol%. Packed columns with 6 mm Raschig rings were employed as contractors.Although a certain amount of ethanol was dissolved into the solvent simultaneously with the trace components, the dissolved ethanol was easily recovered by scrubbing the solvent with a small amount of water. Assuming the state of infinite dilution for each component, a simple calculational procedure was devised to determine the height per mass-transfer unit for some components in packed columns from the experimental data.

【 授权许可】

Unknown