Equilibria and kinetics for reactive extraction of lactic acid using Alamine 336 in decanol

Abstract

Lactic acid is an important commercial product and extracting this from aqueous solution is a growing requirement in fermentation-based industries. The design of an amine extraction process requires (i) equilibrium and (ii) kinetic data for the acid±amine (solvent) system used. The equilibrium complexation constants for ratios of (1:1) and (2:1) have been estimated. The kinetics of extraction of lactic acid by Alamine 336 in decanol has also been determined. The reaction between lactic acid and Alamine 336 in decanol in a stirred cell falls in Regime 3, ie extraction accompanied by a fast chemical reaction occurring in the diffusion ®lm. The reaction has been found to be zero order in Alamine 336 and ®rst order in lactic acid with a rate constant of 0.21 s À1. These data will be useful in the design of extraction processes.

Intensification of enzymatic conversion of glucose to lactic acid by reactive extraction

“…Analytical techniques for measuring lactic acid concentration, method of equilibria and kinetic studies have been presented previously (Wasewar et al, 2002b).…”

Separation and Purification Technologies for Lactic Acid – A Brief Review

“…For example, liquid-liquid extraction of lactic acid (LA) with the tertiary amine Alamine 336 (B) gives a reaction complex (BLA) which remains in the organic phase and may be represented by Eq. 4 (Wasewar et al 2002b):…”

“…The alkylamine most used for LA extraction is alanine 336, which is a mixture of tri-n-octylamine and tri-n-dodecylamine (Trindade 2002). Alanine 336 has high viscosity, requiring the addition of diluents such as methyl isobutyl ketone (MIBK) (Wasewar et al 2002a), hexane (Matsumoto et al 2003), decanol (Wasewar et al 2002b), dodecane (Malmary et al 2000), and kerosene (Alkaya et al 2009).…”

Reactive Extraction of Caproic Acid using Tri-n- Butyl Phosphate (TBP) in Non Toxic Diluents

“…Lots of work on the reactive extraction of various carboxylic acids [11][12][13][14][15][16][17][18][19][20][21][22][23][24] using tertiaryamines(TOA) and quaternary amines(Aliquat) has been done but very little work using organophosphorus extractants for caproic acid extraction using natural diluents is hardly available in the literature. The distribution coefficient of caproic acid between water and TBP dissolved in diluents (vegetable oils) were studied at isothermal conditions, in the present work.…”