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 Jul 21 00:00:00 EDT 1992

OSTI ID:7233112

King, C J; Tung, L A

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 carboxylate which dewatered and decomposed to the desired carboxylic acid and the alkylamine or ammonia. 8 figs.

• DOE Contract Number: AC03-76SF00098
• Assignee: Univ. of California, Oakland, CA (United States)
• Patent Number(s): A; US 5132456
• Application Number: PPN: US 7-697315
• OSTI ID: 7233112
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CARBOXYLIC ACIDS
CHEMICAL INDUSTRY
DESORPTION
ENERGY CONSERVATION
INDUSTRY
ORGANIC ACIDS
ORGANIC COMPOUNDS
PH VALUE
REGENERATION
SORPTION
SYNTHESIS