Carboxylic acids are sorbed from aqueous feedstocks onto a solid adsorbent in the presence of carbon dioxide under pressure. The acids are freed from the sorbent phase by a suitable regeneration method, one of which is treating them with an organic alkylamine solution thus forming an alkylamine-carboxylic acid complex which thermally decomposes to the desired carboxylic acid and the alkylamine.
ORIGIN OF THE INVENTION
This invention was made in the performance of work funded by the United States Department of Energy under Contract No. DE-AC03-76SF00098. The United States Government has certain rights to this invention.