Method for producing pharmaceutical drug particles of small particle size
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United States of America Patent
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Apr 15, 2014
Grant Date -
Dec 1, 2011
app pub date -
Feb 11, 2010
filing date -
Feb 11, 2009
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Abstract
Pharmaceutical drug particles of small particle size are produced by combining a solvent-non-solvent precipitate with an in-situ spray drying process. A pharmaceutical drug is dispersed in a water-miscible solvent, in particular ethanol, and heated in an infeed line under pressure to above the boiling point of the solvent until the drug dissolves. This solution collides as a fine liquid jet with a fine water jet in a gas-permeated microreactor, and the fine mist so arising vaporises rapidly. The organic solvent vaporizes first, then the water. The water may contain surface modifiers.
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