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Epimerisation of menthol stereoisomers. Part 1: Studies on the intrinsic kinetics of the heterogeneously menthol production

Title data

Etzold, Bastian ; Jess, Andreas:
Epimerisation of menthol stereoisomers. Part 1: Studies on the intrinsic kinetics of the heterogeneously menthol production.
In: Chemistry Today. Vol. 26 (2008) Issue 3 . - pp. 21-24.
ISSN 0392-839X

Abstract in another language

The heterogeneously catalysed epimerisation of the menthol stereoisomers is a key step in the synthesis of (-)-menthol in the Symrise process. Due to the thermodynamic equilibrium the mixture of menthol stereoisomers obtained by the hydrogenation of thymol contains only minor amounts of (-)-menthol. In the epimerisation step the residual stereoisomers react again to an equilibrium mixture containing (-)-menthol. Kinetic and thermodynamic data necessary for an accurate reactor design are unknown and were derived for industrial relevant conditions of 150 to 210°C and 0.8 to 7.5 MPa hydrogen pressure. Results of experiments and modelling show a good agreement and thus, the derived kinetic parameters can be used for the optimisation of batch slurry processes as well as of continuous fixed bed processes.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: Chimica Oggi
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Faculties
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 22 Jan 2015 08:06
Last Modified: 13 May 2015 13:13
URI: https://eref.uni-bayreuth.de/id/eprint/5820