Feasibility of packed columns for continuous cloud point extraction with subsequent product recovery

Publikationstyp
Journal Article
Publikationsdatum
2021-03-01
Sprache
English
Author
Fellechner, Oliver 
Smirnova, Irina orcid-logo
Institut
Thermische Verfahrenstechnik V-8 
TORE-URI
http://hdl.handle.net/11420/8115
Enthalten in
Separation and purification technology 
Volume
258
Article Number
118046
Citation
Separation and Purification Technology (258): 118046 (2021-03-01)
Publisher DOI
10.1016/j.seppur.2020.118046
Scopus ID
2-s2.0-85096712189
In this work the feasibility of continuous cloud point extraction in packed columns was evaluated. Therefore, extraction of phenylacetic acid with aqueous micellar two-phase systems containing the nonionic surfactant Triton X-114 was chosen as a model system. Raschig rings and structured packing CY from Sulzer were evaluated in terms of HETP, extraction efficiency and enrichment factor. Additionally, the product recovery from the micellar phase was addressed. Back-extraction via pH-shift and adsorption were evaluated to remove phenylacetic acid from the micellar phase, whereas the successful continuous back-extraction in a Kühni column was demonstrated. Finally, several process concepts to recycle the micellar phase and to further purify phenylacetic acid after back-extraction are suggested.
Schlagworte
Cloud point extraction
Continuous extraction
Nonionic surfactants
Random packings
Structured packings