Separation and concentration of lower alcohols from dilute aqueous solutions
- Richland, WA
- Kennewick, WA
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.
- Research Organization:
- Battelle Memorial Institute, Columbus, OH (United States)
- DOE Contract Number:
- AC06-76RL01830
- Assignee:
- Battelle Memorial Institute (Richland, WA)
- Patent Number(s):
- US 5028240
- OSTI ID:
- 867890
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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
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