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Title: Separation of certain carboxylic acids utilizing cation exchange membranes

Abstract

A method of substantially separating monofunctional lower carboxylic acids from a liquid mixture containing the acids wherein the pH of the mixture is adjusted to a value in the range of from about 1 to about 5 to form protonated acids. The mixture is heated to an elevated temperature not greater than about 100/sup 0/C and brought in contact with one side of a perfluorinated cation exchange membrane having sulfonate or carboxylate groups or mixtures thereof with the mixture containing the protonated acids. A pressure gradient can be established across the membrane with the mixture being under higher pressure, so that protonated monofunctional lower carboxylic acids pass through the membrane at a substantially faster rate than the remainder of the mixture thereby substantially separating the acids from the mixture.

Inventors:
;
Issue Date:
OSTI Identifier:
7119634
Application Number:
ON: DE84010961
Assignee:
Dept. of Energy ERA-09-028890; EDB-84-093017
DOE Contract Number:  
AC02-77CH00178
Resource Type:
Patent
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 25 ENERGY STORAGE; CARBOXYLIC ACIDS; SEPARATION PROCESSES; DESIGN; FILTERS; LIQUIDS; MEMBRANES; MIXTURES; DISPERSIONS; FLUIDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; 400105* - Separation Procedures; 250903 - Energy Storage- Batteries- Materials, Components, & Auxiliaries

Citation Formats

Chum, H.L., and Sopher, D.W. Separation of certain carboxylic acids utilizing cation exchange membranes. United States: N. p., 1983. Web.
Chum, H.L., & Sopher, D.W. Separation of certain carboxylic acids utilizing cation exchange membranes. United States.
Chum, H.L., and Sopher, D.W. Mon . "Separation of certain carboxylic acids utilizing cation exchange membranes". United States.
@article{osti_7119634,
title = {Separation of certain carboxylic acids utilizing cation exchange membranes},
author = {Chum, H.L. and Sopher, D.W.},
abstractNote = {A method of substantially separating monofunctional lower carboxylic acids from a liquid mixture containing the acids wherein the pH of the mixture is adjusted to a value in the range of from about 1 to about 5 to form protonated acids. The mixture is heated to an elevated temperature not greater than about 100/sup 0/C and brought in contact with one side of a perfluorinated cation exchange membrane having sulfonate or carboxylate groups or mixtures thereof with the mixture containing the protonated acids. A pressure gradient can be established across the membrane with the mixture being under higher pressure, so that protonated monofunctional lower carboxylic acids pass through the membrane at a substantially faster rate than the remainder of the mixture thereby substantially separating the acids from the mixture.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {5}
}