Spray drying process control of drying kinetics
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United States of America Patent
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Dec 25, 2012
Grant Date -
Feb 11, 2010
app pub date -
Jul 29, 2009
filing date -
Jun 30, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides exemplary systems and methods for producing dry powder formulations. In one embodiment, a system (10) includes at least one conditioning zone (12) having an inlet (20) to introduce an atomized formulation (18) into the conditioning zone. A controller (14, 16) controls temperature and relative humidity of the airflow into the conditioning zone to allow amorphous-to-crystalline transformation of the atomized formulation. In another embodiment, the formulation is suspended in the conditioning zone for a residence time of sufficient duration to allow surface orientation of surface active components. A dryer (24) is coupled to the conditioning zone to dry the atomized formulation, and a collector (28) collects the formulation in powder form.
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