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Comparative study on reactive extraction of nicotinic acid with Amberlite LA-2 and D2EHPA

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Dan Cascaval, Anca-Irina Galaction, Alexandra-Cristina Blaga, Maria Camarut

Editorial: Separation Science and Technology, 42, p.389-401, 2007.

Rezumat:

The comparative study on reactive extraction of nicotinic acid with Amberlite LA-2 and D2EHPA in three solvents with different polarity indicated that the extractant type and solvent polarity control the extraction mechanism. Thus, the reactive extraction with Amberlite LA-2 in low-polar solvents occurs by means of the interfacial formation of an aminic adduct with 3 or 2 extractant molecules. If solvents with higher polarity are used, each reactant participates with one molecule to the interfacial reaction. The mechanism of reactive extraction with D2EHPA involves in all cases the formation of a salt as the product of the interfacial reaction between one molecule of each reactant.

Cuvinte cheie: Reactive extraction, Bioseparation