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.degree. 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:
-
- Arvada, CO
- Maarssenbroek, NL
- Issue Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- OSTI Identifier:
- 865184
- Patent Number(s):
- 4476025
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS
- DOE Contract Number:
- EG-77-C-01-4042
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- separation; carboxylic; acids; utilizing; cation; exchange; membranes; method; substantially; separating; monofunctional; liquid; mixture; containing; ph; adjusted; value; range; form; protonated; heated; elevated; temperature; 100; degree; brought; contact; perfluorinated; membrane; sulfonate; carboxylate; mixtures; pressure; gradient; established; pass; faster; rate; remainder; liquid mixture; cation exchange; mixture containing; elevated temperature; carboxylic acids; carboxylic acid; exchange membrane; faster rate; exchange membranes; pressure gradient; /210/
Citation Formats
Chum, Helena L, and Sopher, David W. Separation of certain carboxylic acids utilizing cation exchange membranes. United States: N. p., 1984.
Web.
Chum, Helena L, & Sopher, David W. Separation of certain carboxylic acids utilizing cation exchange membranes. United States.
Chum, Helena L, and Sopher, David W. Sun .
"Separation of certain carboxylic acids utilizing cation exchange membranes". United States. https://www.osti.gov/servlets/purl/865184.
@article{osti_865184,
title = {Separation of certain carboxylic acids utilizing cation exchange membranes},
author = {Chum, Helena L and Sopher, David 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.degree. 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 = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}