Sorption of carboxylic acid from carboxylic salt solutions at PHS close to or above the pK.sub.a of the acid, with regeneration with an aqueous solution of ammonia or low-molecular-weight alkylamine

Patent · Tue Dec 31 23:00:00 EST 1991

OSTI ID:868401

King, C Judson ^[1]; Tung, Lisa A ^[2]

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1. Kensington, CA
2. El Cerrito, CA

Carboxylic acids are sorbed from aqueous feedstocks at pHs close to or above the acids' pH.sub.a into a strongly basic organic liquid phase or onto a basic solid adsorbent or moderately basic ion exchange resin. the acids are freed from the sorbent phase by treating it with aqueous alkylamine or ammonia thus forming an alkylammonium or ammonium carobxylate which dewatered and decomposed to the desired carboxylic acid and the alkylamine or ammonia.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: AC03-76SF00098
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5132456
• OSTI ID: 868401
• Country of Publication: United States
• Language: English

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acid
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adsorbent
alkylamine
alkylammonium
ammonia
ammonium
aqueous
aqueous alkylamine
aqueous feed
aqueous feedstocks
aqueous solution
basic
carboxylic
carboxylic acid
carboxylic acids
carobxylate
close
decomposed
desired
desired carboxylic
dewatered
exchange
exchange resin
feedstocks
forming
freed
liquid
liquid phase
low-molecular-weight
moderately
organic
organic liquid
ph
phase
phs
pk
regeneration
resin
salt
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salt solutions
solid
solid adsorbent
solution
solutions
sorbed
sorbent
sorbent phase
sorption
strongly
treating
weight alkyl