Abstract
The selective aluminum extraction by three different calixarenes (p-tert-butyl-calix[4]arene-tetra-2-acetic-acid-ethyl-ester, p-tert-butyl-calix[4]arene-tetra-2-acetic-acid and p-tert-butyl-calix-[4]arene-di-2-acetic-acid-ethyl-ester) from an industrial pickling bath solution was studied. The pickling bath solution contained hydrofluoric and phosphoric acid as its main components. The Al removal was not successful and also no significant extraction of trace metals present was observed.