ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Transport of 5-Methyl-2-pyrazinecarboxylic Acid through a Layered Bulk Liquid Membrane

Ľ. Kubišová, J. Marták, and Š. Schlosser

Department of Chemical and Biochemical Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, SK-812 37 Bratislava

E-mail: schlosser@cvt.stuba.sk

Received: 5 April 2002

Abstract: Pertraction of 5-methyl-2-pyrazinecarboxylic acid (MPCA) through a layered liquid membrane and parameters influencing the transport with trioctylamine (TOA) carrier have been studied. A simple di usion model correlates concentration dependences in all three phases relatively well. By increasing concentration of the carrier from 0.2 to 0.6 kmol m⁻³ an increase of the transport rate of MPCA does not occur despite the fact that the value of the distribution coecient of MPCA increases 2.68 times. While H₂SO₄ and sulfates in the feed do not influence much the transport of MPCA, the addition of sodium chloride slows down the flux of MPCA markedly and increases the co-transport of mineral acids. In pertraction of MPCA from one-molar sulfate solution the ratio of molar fluxes of sulfuric acid and MPCA is equal to one. In pertraction from the feed containing 1 kmol m⁻³ of NaCl the value of this ratio is equal nearly to four. However, the flux of MPCA is four times lower.

Full paper in Portable Document Format: 566a418.pdf

Chemical Papers 56 (6) 418–425 (2002)