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1. (WO2003004142) PROCESS FOR THE PRODUCTION OF MICRO AND/OR NANO PARTICLES
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2003/004142 International Application No.: PCT/IB2001/001780
Publication Date: 16.01.2003 International Filing Date: 27.09.2001
Chapter 2 Demand Filed: 29.04.2002
IPC:
A61K 9/16 (2006.01) ,A61K 9/51 (2006.01) ,B01J 2/04 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9
Medicinal preparations characterised by special physical form
14
Particulate form, e.g. powders
16
Agglomerates; Granulates; Microbeadlets
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9
Medicinal preparations characterised by special physical form
48
Preparations in capsules, e.g. of gelatin, of chocolate
50
Microcapsules
51
Nanocapsules
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2
Processes or devices for granulating materials, in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
02
by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
04
in a gaseous medium
Applicants: REVERCHON, Ernesto[IT/IT]; IT (UsOnly)
MICRO & NANO MATERIALS SAGL[CH/CH]; Viale S. Franscini, 1 CH-6900 Lugano, CH (AT, AU, BE, CA, CH, CN, CY, DE, DK, ES, FI, FR, GB, GR, IE, IL, IT, JP, LU, MC, NL, PT, SE, SG, TR)
Inventors: REVERCHON, Ernesto; IT
Priority Data:
1209/0102.07.2001CH
Title (EN) PROCESS FOR THE PRODUCTION OF MICRO AND/OR NANO PARTICLES
(FR) PROCEDE DE PRODUCTION DE MICROPARTICULES ET/OU NANOPARTICULES
Abstract:
(EN) A process and an apparatus are proposed to perform the supercritical assisted atomization of nano and/or micro metric powders. It is possible to use liquid solvent at process conditions in which they show a low solubility in carbon dioxide. Atomization is obtained by solubilizing pressurized carbon dioxide (compressed, liquid, supercritical) in a solution formed by the solid to be micronized and the liquid solvent, solubilizing carbon dioxide up to near equilibrium conditions and then atomizing the solution down to near atmospheric conditions through a thin wall injector, to produce very small droplet of micronic and sub-micronic dimensions. The subsequent evaporation of the droplets produces particles with diameters ranging between 0.02 and 10 micron.
(FR) L'invention porte sur un procédé et sur un appareil destinés à effectuer une atomisation assistée supercritique de poudres nanométriques et/ou micrométriques. Il est possible d'utiliser un solvant liquide dans des conditions de traitement où l'on a une faible solubilité du dioxyde de carbone. Pour réaliser l'atomisation, on solubilise le dioxyde de carbone sous pression (comprimé, liquide, supercritique) dans une solution formée par le solide à microniser et le solvant liquide, on solubilise le dioxyde de carbone jusqu'à atteindre des conditions d'équilibre proche et on atomise ensuite la solution de façon à descendre jusqu'à des conditions atmosphériques proches au moyen d'un injecteur à paroi mince de façon à générer de très petites gouttelettes de dimensions microniques et submicroniques. L'évaporation ultérieure des gouttelettes produit des particules ayant des diamètres compris entre 0,02 et 10 microns.
front page image
Designated States: AU, CA, CN, IL, JP, SG, US
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
Publication Language: English (EN)
Filing Language: English (EN)