Method and apparatus for controlling uniformity of crystalline precipitates
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United States of America Patent
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Jul 8, 2003
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N/A
app pub date -
Aug 16, 1999
filing date -
Sep 4, 1998
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Abstract
Solvent containing a product (or precursor for the product) and anti-solvent are introduced via tangential inputs respectively 17,18 of a fluidic vortex mixer 11. The emerging mix from axial outlet 20 is supplied directly to a precipitate entrapment device such as filter bed 12 so that precipitate is removed from the solution before the precipitated particles have time to grow. Filtrate is treated in a reduced pressure evaporator 13 to recover anti-solvent and return concentrated solution for combining with a product make up stream at 19 and return to tangential input 17 of the fluidic vortex mixer.
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