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

Povzetek

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.

Ključne besede

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

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.08 - Objavljeni znanstveni prispevek na konferenci
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 66.061-987
COBISS: 11754262 Povezava se bo odprla v novem oknu
ISSN: 0896-8446
Št. ogledov: 1901
Št. prenosov: 55
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarne ključne besede: kemijska procesna tehnika;visokotlačna tehnologija;ekstrakcija;kamelice;
URN: URN:SI:UM:
Strani: str.192-198
Letnik: ǂVol. ǂ43
Zvezek: ǂiss. ǂ2
Čas izdaje: Dec. 2007
ID: 8717412