For the regeneration of an industrial pickling bath solution by a solvent extraction process different extractants were investigated for their capability to extract Al. The two main components of the pickling bath solution are phosphoric and hydrofluoric acid. This work describes the results of shake experiments with different p-tert-butyl-calixarenes. Their capabilities to extract Al were compared with the results of Alamine 308 and another basic extractant, tetrabutyl-phosphonium-bromide (TBP-Br), that is [(C 4H 7) 4P] +Br -. Due to the low pH and the strong complexation of Al by fluoride ions in the pickling bath solution, no significant extraction was found for all the tested calixarenes.
Bibliographical noteFunding Information:
This research was supported financially by the Ministry of Economic Affairs, the Ministry of Housing, Spatial Planning and Environment and the Ministry of Education and Science of the Netherlands. We wish to thank Mr. Wangzhao Zhu and Mr. Duco Bosma for conducting the analysis by HR ICP-MS and ion chromatograph.
- Reactive extraction
ASJC Scopus subject areas
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry