Factory scale process for producing crystalline atorvastatin trihydrate hemi calcium salt
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United States of America Patent
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Jul 29, 2003
Issued Date -
N/A
app pub date -
Jun 14, 2002
filing date -
Dec 17, 1999
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Expired
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Abstract
A factory scale process for producing crystalline atorvastatine trihydrate hemi calcium salt includes the addition of extra methyl tert-butyl ether to the reaction mixture to supersaturate the crystallization matrix. A seed slurry is made up in a make-up/delivery vessel and delivered, under pressure, to the reaction mixture. The process produces crystalline atorvastatin calcium within a consistent size range on a factory scale.
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