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Title: Separation and concentration of lower alcohols from dilute aqueous solutions

Abstract

A process for producing, from a dilute aqueous solution of a lower (C.sub.1 -C.sub.5) alcohol, a concentrated liquid solution of the alcohol in an aromatic organic solvent is disclosed. Most of the water is removed from the dilute aqueous solution of alcohol by chilling sufficiently to form ice crystals. Simultaneously, the remaining liquid is extracted at substantially the same low temperature with a liquid organic solvent that is substantially immiscible in aqueous liquids and has an affinity for the alcohol at that temperature, causing the alcohol to transfer to the organic phase. After separating the organic liquid from the ice crystals, the organic liquid can be distilled to enrich the concentration of alcohol therein. Ethanol so separated from water and concentrated in an organic solvent such as toluene is useful as an anti-knock additive for gasoline.

Inventors:
 [1];  [2];  [1];  [1]
  1. Richland, WA
  2. Kennewick, WA
Issue Date:
Research Org.:
Battelle Memorial Institute, Columbus, OH (United States)
OSTI Identifier:
867890
Patent Number(s):
5028240
Assignee:
Battelle Memorial Institute (Richland, WA)
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
separation; concentration; alcohols; dilute; aqueous; solutions; process; producing; solution; -c; alcohol; concentrated; liquid; aromatic; organic; solvent; disclosed; water; removed; chilling; sufficiently; form; ice; crystals; simultaneously; remaining; extracted; substantially; temperature; immiscible; liquids; affinity; causing; transfer; phase; separating; distilled; enrich; therein; ethanol; separated; toluene; useful; anti-knock; additive; gasoline; aromatic organic; liquid solution; organic phase; organic solvent; aqueous solution; aqueous solutions; organic liquid; aqueous liquid; dilute aqueous; liquid organic; substantially immiscible; aqueous liquids; /44/62/203/

Citation Formats

Moore, Raymond H, Eakin, David E, Baker, Eddie G, and Hallen, Richard T. Separation and concentration of lower alcohols from dilute aqueous solutions. United States: N. p., 1991. Web.
Moore, Raymond H, Eakin, David E, Baker, Eddie G, & Hallen, Richard T. Separation and concentration of lower alcohols from dilute aqueous solutions. United States.
Moore, Raymond H, Eakin, David E, Baker, Eddie G, and Hallen, Richard T. Tue . "Separation and concentration of lower alcohols from dilute aqueous solutions". United States. https://www.osti.gov/servlets/purl/867890.
@article{osti_867890,
title = {Separation and concentration of lower alcohols from dilute aqueous solutions},
author = {Moore, Raymond H and Eakin, David E and Baker, Eddie G and Hallen, Richard T},
abstractNote = {A process for producing, from a dilute aqueous solution of a lower (C.sub.1 -C.sub.5) alcohol, a concentrated liquid solution of the alcohol in an aromatic organic solvent is disclosed. Most of the water is removed from the dilute aqueous solution of alcohol by chilling sufficiently to form ice crystals. Simultaneously, the remaining liquid is extracted at substantially the same low temperature with a liquid organic solvent that is substantially immiscible in aqueous liquids and has an affinity for the alcohol at that temperature, causing the alcohol to transfer to the organic phase. After separating the organic liquid from the ice crystals, the organic liquid can be distilled to enrich the concentration of alcohol therein. Ethanol so separated from water and concentrated in an organic solvent such as toluene is useful as an anti-knock additive for gasoline.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

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