Authors: | Vondran, Johanna Peters, Marc Schnettger, Alexander Sichelschmidt, Christian Seidensticker, Thomas |
Title: | From tandem to catalysis – organic solvent nanofiltration for catalyst separation in the homogeneously W-catalyzed oxidative cleavage of renewable methyl 9,10-dihydroxystearate |
Language (ISO): | en |
Abstract: | Feasibility of oxidative cleavage of methyl oleate in a homogeneous reaction, facilitating the subsequent recovery of the catalyst from a single phase, is a challenge. Using the high molecular catalyst phosphotungstic acid (2880 Da) as an affordable catalyst offers potential for membrane separation. To gain insight into side-reactions, the intermediate methyl 9,10-dihydroxystearate was first applied as a model substrate. Thus, the stability of the intermediate methyl 9,10-epoxystearate and the vicinal diol was significantly improved under reaction conditions. Oxidative cleavage of the vicinal diol as a stable intermediate is very promising reaching an overall selectivity of 90% and a selectivity towards the cleavage carboxylic acids of 80%, considering dilution and acidity as the most important parameters. Retention of the catalyst via organic solvent nanofiltration was investigated and we retained 94% of the catalyst in the monophasic system as the first step towards a process concept for a product purification or catalyst recycling strategy. |
URI: | http://hdl.handle.net/2003/41284 http://dx.doi.org/10.17877/DE290R-23126 |
Issue Date: | 2022-04-25 |
Rights link: | https://creativecommons.org/licenses/by/3.0/ |
Appears in Collections: | Lehrstuhl Technische Chemie |
Files in This Item:
File | Description | Size | Format | |
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d1cy02317a.pdf | 3.4 MB | Adobe PDF | View/Open |
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