Edward Haeggström,Jouko Yliruusi,Kai Falck,Heikki Räikkönen,Jenni Pessi,Ilkka Lassila,Antti Meriläinen
申请号：
US15512070
公开号：
US10098842B2
申请日:
2015.10.05
申请国别(地区):
US
年份:
2018
代理人:
摘要：
The invention relates to a method and a device for producing nanoparticles of organic substances, in particular by controlled expansion of pressurized solutions. The method comprises: admixing the organic substance and a supercritical fluid to form a mixture at a first pressure； decreasing the first pressure gradually to a second pressure so that a flow of the mixture is formed and nucleation of the organic substance in the mixture is initiated； and, decreasing the second pressure to a third pressure, so that solidification of the fluid of the mixture, comprising the nucleated organic substance, is initiated. The device comprises: a pressure chamber (1) for a mixture of the organic substance and a supercritical fluid； a collection chamber (5) for the nanoparticles； an outlet tube (2) connecting the pressure chamber to the collection chamber (5)； and, one or more second nozzles (6). The outlet tube is provided with a pressure controlling means (3) configured to control pressure of the mixture within the outlet tube and a first nozzle (4) configured to allow expansion of the mixture to the collection chamber.
