Extraction chemistry of fermentation product carboxylic acids

Abstract

We describe here a new type of analog correlators based on stationary waves recovery and spatial Fourier transformation. The theoretical basis of the stationary waves integrated Fourier transform spectrometer (SWIFTS) is first introduced. Based on robust physical principles validated by circuits type simulations, the spectrometer could be an interesting competitor to actual RF analog correlators. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1138–1142, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI.10.1002/mop.22375

Recovery of Formic Acid by Reactive Extraction Using an Environmentally-Friendly Solvent

“…However, at the same extractant levels and higher FA concentrations, the z values varied between 1 and 2, indicative of the simultaneous presence of 2:1 and 1:1 type acid-amine complexes. The results are consistent with those reported in the literature for tertiary amines and carboxylic acids (Tamada et al, 1990;Wasewar et al, 2002;Qin et al, 2003;Uslu, 2009;Martı et al, 2011) CONCLUSION Solvent or diluent type used during reactive extraction is so important for the recovery of carboxylic acids (Kertes and King, 1986). However, the most effective solvents are generally toxic chemicals and this is the most critical disadvantage of the technique that prevents its widespread use in industries.…”

“…Several separation techniques such as solvent extraction, distillation, membrane filtration, electrodialysis, ion exchange and adsorption have been tested for the purpose (Martı 2010). Reactive extraction, which is the advanced form of traditional solvent extraction method, has been favored over other techniques due to its high efficiency, ease of operation, low energy demand and cost (Kertes and King, 1986;Martı et al, 2011). Another advantage of the technique is thermal stability of the target molecule during the process (Martı and Gürkan, 2015).…”

“…Thus, it directly influences the stability and solubility of the complex structures that also affect the recovery efficiency. Mostly alcohols, alkanes and ketones are used as the organic phase diluents in the reactive extraction of carboxylic acids (King and Kertes, 1986;Tamada et al, 1990;Martı, 2010;Uslu et al, 2015;Datta et al, 2016).…”

Recovery of Glutaric Acid Using Tri-N-Butyl Phosphate: Effect of Diluents and Temperature

“…The search for an advantageous process allowing for the removal of carboxylic acid is based on an approach that removes acids from the fermentation broth or other mixture, while leaving the soluble salts behind in the fermentation broth. Industrial scale fermentors for production of carboxylic acids operate at different temperatures from 273-373 K according to product selectivity [3]. Reactive extraction is an efficient and clean technology for separation of carboxylic acid from fermentation broth and industrial stream.…”

“…Reactive extraction is an efficient and clean technology for separation of carboxylic acid from fermentation broth and industrial stream. Phosphoric bonded oxygen containing extractants, dissolved in appropriate organic solvents are effective extractants for carboxylic acid [3].…”