Influence of temperature and pressure during PGSS[sup]TM micronization and storage time on degree of crystallinity and crystal forms of monostearate and tristearate

Zoran Mandžuka (Avtor), Željko Knez (Avtor)

Povzetek

For controlling the degree of crystallinity and crystal form during particle formation using supercritical fluids, knowledge of pressure influence on solid-liquid-gas (S-L-G) equilibrium and solubility data of the system is crucial. S-L-G equilibrium data were determined in pressure range from 50 to 600 bar for systems monostearate/CO2 and tristearate/CO2 using a high-pressure view cell. Results showed a temperature minimum for both systems.The solubilities of CO2 in liquid glycerides were high: maximum solubilities, which were determined at temperatures 70 and 90 °C and pressure range from 50 to 450 bar, were from 50 to 90 mol%. Physical characteristics of micronized monostearate and tristearate samples were studied in detail after micronization and after 3 months of storage at 20 °C.

Ključne besede

kemijska procesna tehnika;visokotlačna tehnologija;superkritični fluidi;mikronizacija;drobni delci;PGSS;stopnja kristaliničnosti;chemical processing;high pressure technology;supercritical fluids;micronization;fine particles;Particles from Gas Saturated Solution;degree of crystallinity;

Podatki

Jezik:	Angleški jezik
Leto izida:	2008
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK:	66-987
COBISS:	12228886
ISSN:	0896-8446
Št. ogledov:	2435
Št. prenosov:	41
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Influence of temperature and pressure during PGSSTM micronization and storage time on degree of crystallinity and crystal forms of monostearate and tristearate
Sekundarne ključne besede:	kemijska procesna tehnika;visokotlačna tehnologija;superkritični fluidi;mikronizacija;drobni delci;PGSS;stopnja kristaliničnosti;
URN:	URN:SI:UM:
Strani:	Str. 102-111
Letnik:	ǂVol. ǂ45
Zvezek:	ǂiss. ǂ1
Čas izdaje:	May 2008
DOI:	10.1016/j.supflu.2007.11.006
ID:	8717779