Solvent equilibriums for extraction of carboxylic acids from water

Liquid - liquid equilibria of the water + butyric acid + decanol ternary system

“…Production of organic acids such as acetic, citric, lactic, propionic and butyric acids can be given as an example. Extraction can be employed not an only in downstream separation but also in combination with fermentation (Wardell and King, 1978;Hegazi, 1984;Fahim et al, 1992;Arce et al, 1995;Fahim and Al-Muhtaseb, 1996;Fahim et al, 1997;Sólimo et al, 1997;Colombo et al, 1999;Aljimaz et al, 2000;Taghikhani et al, 2001;Trevor et al, 2001;İnce and Kırbaşlar, 2002;İnce, 2005).…”

Alternative Feedstocks Program Technical and Economic Assessment: Thermal/Chemical and Bioprocessing Components

“…Several process flowsheets exist for the recovery of acetic acid from dilute aqueous solution (Rousseau, 1987). In particular, several amine-based extractants show remarkable selectivity for acetic acid over water with distribution coefficients of greater than 10 as the acetic acid concentration goes below 0.5 wt % (Wardell and King, 1978). In addition, data have been gathered for the distribution properties of many fermentation product carboxylic acids, including acetic, lactic, and citric acids (Kertes and King, 1986).…”

Novel Regenerated Solvent Extraction Processes for the Recovery of Carboxylic Acids or Ammonia from Aqueous Solutions Part I. Regeneration of Amine-Carboxylic Acid Extracts

“…Diluents which have functional groups can interact with the complex and affect the distribution ratio of the acid between the aqueous and organic Long-chain aliphatic amines have been found to be good extractants 7 for carboxylic acids (25,26,27). Alamine 336 (a long-chain tertiary amine, Henkel Corp.) has been used as the extractant in this work because of low water solubility, thermal stability, and commercial availablity.…”