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On-line NMR in process engineering

✍ Scribed by R. Neudert; E. Ströfer; W. Bremser

Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
463 KB
Volume
24
Category
Article
ISSN
0749-1581

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✦ Synopsis

The basis of the evaluation of chemical processes is a comprehensive knowledge about the concentration profiles of the reactants as a function of time. Normally, analytical samples are taken from the reaction medium, with the disadvantage that the analysis does not occur on the reaction time scale and the reaction equilibrium itself is disturbed. For this reason, an on-tine analytical system based on the coupling between an NMR spectrometer and a chemical reactor was developed.

The applicability of the system is demonstrated on a Wittig reaction, the last step in the synthesis of retinoic acid. "PNMR was employed for the detection of the time dependent concentration of phosphorylated reaction components. The consequences of the results with respect to a change of the chemical process are discussed.

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