Water-enhanced solubility of carboxylic acids in organic solvents and its application to extraction processes

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00011a023· OSTI ID:6759882

Starr, J N ^[1]; King, C J ^[2]

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1. Abbott Labs., North Chicago, IL (United States)
2. Lawrence Berkeley Lab., CA (United States)

This paper reports on solubilities of carboxylic acids in certain organic solvents which increase sharply as the concentration of water in the solvent increases. This phenomenon leads to a method of regeneration for solvent-extraction processes whereby coextracted water is selectively removed from the extract, such as by stripping, thereby precipitating the acid. The removal of a minor constituent to cause precipitation reduces energy consumption, in contrast with bulk removal of solvent. Solubilities of fumaric acid were measured in a number of organic solvents, with varying amounts of water in the organic phase. Cyclohexanone and methylcyclohexanone were chosen as solvents for which detailed solid-liquid and liquid-liquid equilibria were measured for adipic, fumaric, and succinic acids in the presence of varying concentrations of water, at both 25 and 45[degrees]C. Batch precipitation experiments were performed to demonstrate the processing concept and determine the relative volatility of water to solvent in the presence of carbon.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6759882
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 31:11; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
400201 -- Chemical & Physicochemical Properties
CARBOXYLIC ACIDS
DICARBOXYLIC ACIDS
EXTRACTION
FUMARIC ACID
ORGANIC ACIDS
ORGANIC COMPOUNDS
PRECIPITATION
SEPARATION PROCESSES
SOLUBILITY
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SUCCINIC ACID