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
- 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 = {Mon May 09 00:00:00 EDT 1983},
month = {Mon May 09 00:00:00 EDT 1983}
}