Method for precipitation of small medicament particles into use containers
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United States of America Patent
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Jun 29, 2010
Grant Date -
Apr 17, 2008
app pub date -
Oct 11, 2007
filing date -
Oct 11, 2006
priority date (Note) -
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Abstract
Commercially feasible methods for lyophobic precipitation of liquid-dispersed or dissolved material (e.g., medicaments) are provided wherein a plurality of individual, open containers (22) each containing a quantity (84) of a solution or dispersion are treated within a common pressurizable chamber (12). In this process, desired near-supercritical or supercritical temperature and pressure conditions are established for a selected antisolvent gas such as carbon dioxide, and an ultrasonic device (14) is actuated to generate high energy ultrasonic waves in the chamber (12). This leads to intense mixing of the antisolvent with the liquid solution or dispersion within the containers (22), with consequent solvent removal and material precipitation.
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