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Extraction of organic acids by ion-pair formation with tri-n-octylamine : Part. 1. Extraction Rate and Influence of pH and Ionic Strength

โœ Scribed by M. Puttemans; L. Dryon; D.L. Massart

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
589 KB
Volume
161
Category
Article
ISSN
0003-2670

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โœฆ Synopsis

The extraction scheme for dyes, developed previously, is applied to benzoic acid and its hydroxylated derivatives. Extractions are done with tri-n-octylamine at pH 5.5 and an ionic strength of 0.1 into chloroform. Equilibrium is attained in 20 min or less. The influences of pH and ionic strength of the extraction medium on the recoveries are described. The scheme developed for dyes is applicable for benzoic acid and salicylic acid; for more polar acids the pH and ionic strength must be changed in order to maximize the recovery.

๐Ÿ“œ SIMILAR VOLUMES

Extraction of organic acids by ion-pair
Extraction of organic acids by ion-pair formation with tri-n-octylamine : Part 2. Back-extraction
โœ M. Puttemans; L. Dryon; D.L. Massart ๐Ÿ“‚ Article ๐Ÿ“… 1984 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 383 KB

Acids, extracted with tri-n-octylamine, are extracted back to an aqueous phase. The back-extraction is based on a displacement reaction. Several displacing ions were used: chloride, bromide, iodide, nitrate and perchlorate. The efficiency increases in the order chloride < bromide < iodide < perchlor

Extraction of organic acids by ion-pair
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โœ M. Puttemans; L. Dryon; D.L. Massart ๐Ÿ“‚ Article ๐Ÿ“… 1985 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 414 KB

Synthetic food dyes are extracted by ion-pair formation with tri-n-octylamine. Mixed organic phases are used, consisting of mixtures of hexane with one of the following solvent modifiers: chloroform, dichloromethane, methyl isobutyl ketone, butyl acetate or pentanol. Logarithmic plots of the distrib