Reactive Extraction of Lactic Acid by Using Tri-n-octylamine: Structure of the Ionic Phase
| Autor: | Cosima Stubenrauch, Bernd Langanke, Helmut Gehrke, Matthias Aimer, Elias Klemm |
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| Rok vydání: | 2015 |
| Předmět: |
Chromatography
Downstream processing Organic Chemistry Extraction (chemistry) food and beverages 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Catalysis Lactic acid chemistry.chemical_compound 020401 chemical engineering chemistry Phase (matter) Hemicellulose Fermentation Microemulsion 0204 chemical engineering Cellulose 0210 nano-technology |
| Zdroj: | Chemistry (Weinheim an der Bergstrasse, Germany). 22(10) |
| ISSN: | 1521-3765 |
| Popis: | Lactic acid is a promising biogenic platform chemical which can be produced by fermentation of cellulose and hemicellulose. However, separating lactic acid from the fermentation broth is extremely costly and technically complex. We therefore investigated whether liquid/liquid extraction of lactic acid with tri-n-octylamine is a cost-effective alternative to the existing downstream processing method. In order to find an answer to this question, the structure of the middle phase of the occurring three-phase region, which is enriched with up to 20 wt. % lactic acid, was explored. The results of our IR, small-angle X-ray scattering and NMR measurements show that this phase is ionic and has a bicontinuous structure. Due to the analogy with bicontinuous microemulsions, it should be possible to further enrich the lactic acid, which could lead to a rethink regarding the design of extraction processes. |
| Databáze: | OpenAIRE |
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