D. Datta, Sushil Kumar
Apr 15, 2014
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Influential Citations
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Journal
Journal of Chemical & Engineering Data
Abstract
Pyridine-2-carboxylic acid (also known as picolinic acid) is used as an intermediate to produce pharmaceuticals, herbicides, and metal salts for applications in the nutritional supplements. Enzymatic oxidation of 3-hydroxyanthranilic acid is a biosynthesis route to produce this acid. Reactive extraction is found to be an attracting separation technique to recover carboxylic acids from their dilute aqueous solutions like fermentation broth, but the toxicity of the extractive system is a major issue. Therefore, an appropriate combination and selection of extractant-diluent system can give a higher distribution of the acid with minimal toxicity. In this paper, the equilibrium study on the reactive extraction of pyridine-2-carboxylic acid [(0.01 to 0.25) kmol·m–3] from dilute aqueous solutions is carried out by using extractant–diluent systems consisting of two different extractants, tri-n-butyl phosphate [TBP, (0.365 to 2.192) kmol·m–3] and tridodecylamine [TDDA, (0.079 to 0.474) kmol·m–3] and two different ...