Petra Kotnik (Author), Mojca Škerget (Author), Željko Knez (Author)

Abstract

Supercritical fluid extraction of chamomile flower heads was performed on semicontinuous extraction apparatus in the lab scale using carbon dioxide as solvent. The results of high pressure experiments were compared with those obtained with Soxhlet extraction, steam distillation and maceration. The obtained extracts were analysed by HPLC on ?-bisabolol, matricine and chamazulene content and by gravimetrical method on essential oil and waxes content. The highest content of active components in extracts and highest extraction yield were obtained using SFE at 250 bar and 40 °C. At this extraction conditions the two step separation was used to optimize the separation of essential oil from unwanted components. Dynamic behaviour of theSFE with single step separation runs were analysed using two mathematical models for describing the constant rate period and subsequent falling rate period. Based on the experimental data, external mass transfer coefficient, diffusion coefficient and diffusivity in solid phase were estimated. Results showed acceptable agreement of calculated and experimental data. Based on theparameters determined in the lab scale, the extraction process was successfully transferred to pilot scale.

Keywords

kemijska procesna tehnika;visokotlačna tehnologija;ekstrakcija;kamelice;chemical processing;high pressure technology;supercritical extraction;chamomile;matricine;chamazulen;scale-up;

Data

Language: English
Year of publishing:
Typology: 1.08 - Published Scientific Conference Contribution
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
UDC: 66.061-987
COBISS: 11754262 Link will open in a new window
ISSN: 0896-8446
Views: 1901
Downloads: 55
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary keywords: kemijska procesna tehnika;visokotlačna tehnologija;ekstrakcija;kamelice;
URN: URN:SI:UM:
Pages: str.192-198
Volume: ǂVol. ǂ43
Issue: ǂiss. ǂ2
Chronology: Dec. 2007
ID: 8717412