Purification of sclareol by supercritical CO2 fractionation process

Abstract : The implementation and optimization of continuous supercritical CO2 fractionation of a clary sage extract containing 25 wt% of sclareol were performed in order to increase its sclareol content. After preliminary experiments confirming the feasibility of the process, different operating conditions were studied: CO(2-)over-feed mass ratio from 25 up to 115, and pressure between 11 and 13 MPa, with an internal reflux due to a thermal gradient 323-338 K along the column, through an experimental design. Four responses were highlighted: sclareol mass fraction in the raffinate, sclareol mass fraction in the extract, sclareol yield in the raffinate, and the amount of an undesirable compound exhibiting a similar behaviour to sclareol and thus, hard to separate from sclareol by conventional techniques. This work allowed us to highlight the best operating conditions: a pressure of 12.6 MPa and a CO2-over-feed mass ratio of 114.5 leading to a sclareol mass fraction in raffinate and extract of 75.3% and 4.6% respectively, to a sclareol yield of 82.4% in the raffinate, and to an amount of 0.08% of the undesirable compound in the raffinate.
Type de document :
Article dans une revue
The Journal of Supercritical Fluids, 2017, 122, pp.35 - 42. 〈10.1016/j.supflu.2016.12.001〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01596425
Contributeur : Elena Rosu <>
Soumis le : mercredi 27 septembre 2017 - 15:42:36
Dernière modification le : jeudi 11 janvier 2018 - 06:25:05

Identifiants

Citation

C. Dufour, Christelle Crampon, C. Delbecque, P-P. Garry, Elisabeth Badens. Purification of sclareol by supercritical CO2 fractionation process. The Journal of Supercritical Fluids, 2017, 122, pp.35 - 42. 〈10.1016/j.supflu.2016.12.001〉. 〈hal-01596425〉

Partager

Métriques

Consultations de la notice

49