Article (Scientific journals)
Aerated extraction columns for in situ separation of bio-based diamines from cell suspensions
Bednarz, Andreas; Jupke, Andreas; Spieß, Antje C. et al.
2019In Journal of Chemical Technology and Biotechnology, 94 (2), p. 426-434
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Keywords :
solvent extraction; process intensification; process integration; multiphase separation; single-drop experiments
Abstract :
[en] BACKGROUND: Extraction is the method of choice for separating sensitive products. For example, it has been applied in aromatics and rare-earth metal separation. Recently, biotechnological processes entered the field of bulk chemicals andmight benefit fromprocess intensification by in situ extraction of inhibiting products, however in the presence of cells and/or aeration. This study applies reactive extraction of the polyamide monomer hexane-1,6-diamine fromcell-containingmedium. RESULTS: To prove technical feasibility of this reactive extraction, simulation of the extraction column based on single-drop measurements was validated at pilot-scale. Simulated results show good accordance with experimental data with an error below 20%. The extraction column was subsequently used as a bioreactor with integrated aeration and product extraction applying a four-phase system investigating the effect on drop distributions and holdup of the dispersed phases. Interestingly, aeration increased the holdup up to five-fold and decreased themean drop size of the organic extractive phase by 30%, thereby potentially improving extraction efficiency. CONCLUSION: The ReDrop simulation tool is capable of predicting challenging separation processes like the reactive extraction of hexane-1,6-diamine with D2EHPA diluted in oleyl alcohol from a biotransformation medium. The process design enabled four-phase operation of the column with aeration, extractive organic phase and cell-containing continuous aqueous phase.
Disciplines :
Chemical engineering
Author, co-author :
Bednarz, Andreas
Jupke, Andreas
Spieß, Antje C.
Pfennig, Andreas  ;  Université de Liège - ULiège > Department of Chemical Engineering > PEPs - Products, Environment, and Processes
Language :
English
Title :
Aerated extraction columns for in situ separation of bio-based diamines from cell suspensions
Publication date :
2019
Journal title :
Journal of Chemical Technology and Biotechnology
ISSN :
0268-2575
Publisher :
John Wiley & Sons, Hoboken, United States - New Jersey
Volume :
94
Issue :
2
Pages :
426-434
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 January 2019

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