skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Process of concentrating ethanol from dilute aqueous solutions thereof

Abstract

Relatively dilute aqueous solutions of ethanol are concentrated by passage through a bed of a crystalline silica polymorph, such as silicalite, to adsorb the ethanol with residual dilute feed in contact with the bed, which is displaced by passing concentrated aqueous ethanol through the bed without displacing the adsorbed ethanol. A product concentrate is then obtained by removing the adsorbed ethanol from the bed together with at least a portion of the concentrated aqueous ethanol used as the displacer liquid. This process permits ethanol to be concentrated from dilute fermentation beers, which may contain from 6 to 10% ethanol, to obtain a concentrate product at very low energy cost having an ethanol concentration in excess of 95%, such as a concentration of from 98 to 99.5%.

Inventors:
 [1];  [2]
  1. Ames, IA
  2. Slater, IA
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
863932
Patent Number(s):
4,277,635
Application Number:
06/162,524
Assignee:
Iowa State Univ. Research Foundation, Inc., Ames, IA (United States) AMES
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; process; concentrating; ethanol; dilute; aqueous; solutions; relatively; concentrated; passage; bed; crystalline; silica; polymorph; silicalite; adsorb; residual; feed; contact; displaced; passing; displacing; adsorbed; product; concentrate; obtained; removing; portion; displacer; liquid; permits; fermentation; beers; contain; 10; obtain; energy; cost; concentration; excess; 95; 98; 99; concentrated aqueous; process permits; aqueous solution; aqueous solutions; dilute aqueous; crystalline silica; relatively dilute; ADSORPTION; MATERIALS RECOVERY; ADSORBENTS; BIOSYNTHESIS; CONCENTRATION RATIO; ENERGY CONSERVATION; EXTRACTION COLUMNS; REGENERATION; SILICON OXIDES; SORPTIVE PROPERTIES; ALCOHOLS; CHALCOGENIDES; EXTRACTION APPARATUSES; HYDROXY COMPOUNDS; MANAGEMENT; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PROCESSING; SEPARATION EQUIPMENT; SILICON COMPOUNDS; SORPTION; SURFACE PROPERTIES; SYNTHESIS; WASTE MANAGEMENT; WASTE PROCESSING; /999/

Citation Formats

Oulman, Charles S., and Chriswell, Colin D. Process of concentrating ethanol from dilute aqueous solutions thereof. United States: N. p., 1981. Web.
Oulman, Charles S., & Chriswell, Colin D. Process of concentrating ethanol from dilute aqueous solutions thereof. United States.
Oulman, Charles S., and Chriswell, Colin D. Tue . "Process of concentrating ethanol from dilute aqueous solutions thereof". United States. https://www.osti.gov/servlets/purl/863932.
@article{osti_863932,
title = {Process of concentrating ethanol from dilute aqueous solutions thereof},
author = {Oulman, Charles S. and Chriswell, Colin D.},
abstractNote = {Relatively dilute aqueous solutions of ethanol are concentrated by passage through a bed of a crystalline silica polymorph, such as silicalite, to adsorb the ethanol with residual dilute feed in contact with the bed, which is displaced by passing concentrated aqueous ethanol through the bed without displacing the adsorbed ethanol. A product concentrate is then obtained by removing the adsorbed ethanol from the bed together with at least a portion of the concentrated aqueous ethanol used as the displacer liquid. This process permits ethanol to be concentrated from dilute fermentation beers, which may contain from 6 to 10% ethanol, to obtain a concentrate product at very low energy cost having an ethanol concentration in excess of 95%, such as a concentration of from 98 to 99.5%.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {7}
}

Patent:

Save / Share: