Method and arrangement for the production of particles
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United States of America Patent
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Nov 19, 2013
Grant Date -
Dec 9, 2010
app pub date -
Dec 1, 2008
filing date -
Dec 7, 2007
priority date (Note) -
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Abstract
A method for producing particles, from a substance, having predetermined size and/or morphology characteristics. The method consists of mixing within a spray nozzle a solution stream containing the substance in dissolved or dispersed form with a supercritical fluid stream. Spraying the mixture through a nozzle into a particle collecting chamber and there separating the particles. The characteristic feature is an additional step, providing a make-up agent (modifier) to the fluid stream, possibly combined with recycling of the fluid and/or performing the method essentially simultaneously in several spray nozzles. Additional features are also a production system comprising functions for performing the method above and the introduction of the make-up agent, recycling of the fluid and performing several runs essentially simultaneously in the same production system. Also a pharmaceutical formulation in which particles produced according to the method has been used for its manufacture.
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