Abstract
Benzeneacetic acid is an important carboxylic acid extensively used in pharmaceutical industries. Thus, interest has been growing in the scientific community toward its recovery from aqueous streams or fermentation broth. Extraction of carboxylic acids by reactive extraction using extractant-diluent is the emerging area of study. With this concept, the reactive extraction of benzeneacetic acid was carried out to study (i) effect of diluents, such as benzene, toluene, xylene, and hexanol; (ii) effect of concentration of extractant, tri-n-caprylyl amine; (iii) effect of pH; and (iv) equilibrium modeling, namely, relative basicity model and mass action law. The equilibrium results are discussed in terms of partition coefficient (P), dimerization constant (D), distribution coefficient (KD), extraction efficiency (η%), overall equilibrium complexation constant (Ke), and loading factor (ϕ). Distribution coefficient trend was observed as xylene > benzene > toluene > hexanol. The extraction efficiency of benzenea...
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