REACTIVE EXTRACTION OF SALICYLIC ACID AND D, L PHENYLALANINE IN A STIRRED CELL

Abstract

Physical and reactive extractions of salicylic acid from the aqueous phase in a stirred cell were investigated theoretically and experimentally. A secondary amine, Amberlite LA 2, was used as the complexing agent for the acid

Reactive extraction of phenylalanine from the aqueous phase was investigated in the same way. For this, a quaternary amine, TOMAC, was used in which the chlorine ion was exchanged by the phenylalanine anion

Because of the instantaneous reaction in both cases, the mass transfer processes are diffusion-controlled. The concentration vs. time curves can be satisfactorily described by the two-film models. The reaction enhances the extraction considerably.

KEYWORDS:

• Reactive extraction
• Salicylic acid
• Amino acid
• Stirred cell

Additional information

Notes on contributors

E. SCHLICHTING

Present address: Gesellschaft für Biotechnologische Forschung mbH, Mascheroder Weg 1, 3300 Braunschweig

W. HALWACHS

Present address: W.C Heraeus GmbH, Postfach 169, 6450 Hanau

K. SCHÜGERL

Offprint requests to K. Schügerl.