Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1981-09-28
1982-08-24
Evans, Joseph E.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
203 22, C07C 2986
Patent
active
043462413
ABSTRACT:
A thermally efficient process for recovering ethanol present in dilute aqueous solution is disclosed which comprises contacting said dilute aqueous ethanol solution with at least one inert extractant which is liquid at ambient temperature and pressure, said extractant being selected from the group consisting of unsubstituted and substituted cyclic secondary amines and unsubstituted and substituted aromatic cyclic amines having a distribution coefficient of at least about 0.70 or a separation factor of at least about 1.0. The invention further provides a process for obtaining substantially anhydrous ethanol from a dilute aqueous ethanol solution in which the ethanol stream is subjected to liquid-liquid extraction to provide an ethanol-poor raffinate phase and an ethanol-rich extract phase, the ethanol present in said latter phase is concentrated in a rectifying column to provide an aqueous ethanol of high proof and the concentrated ethanol is azeotropically distilled in an anhydrous column operated under substantially superatmospheric pressure with thermal values recovered from said anhydrous column being used to satisfy part of all of the thermal operating requirements of the rectifying column.
REFERENCES:
patent: 2700049 (1955-01-01), Rottig
patent: 2848503 (1958-08-01), Fenske
patent: 4100209 (1978-07-01), Libbey
patent: 4251231 (1981-02-01), Baird
patent: 4277635 (1981-07-01), Oulman et al.
patent: 4297172 (1981-10-01), Kyle
patent: 4306884 (1981-12-01), Roth
patent: 4306942 (1981-12-01), Brush
Evans Joseph E.
National Distillers & Chemical Corp.
Tremain Kenneth D.
LandOfFree
Process for recovering ethanol from dilute aqueous solutions emp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for recovering ethanol from dilute aqueous solutions emp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovering ethanol from dilute aqueous solutions emp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1437873