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Crystallization of amino acids using ultrasonic agitation

  • US 6,992,216 B2
  • Filed: 01/07/2003
  • Issued: 01/31/2006
  • Est. Priority Date: 01/07/2002
  • Status: Expired due to Fees
First Claim
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1. A process of crystallizing L-thyroxine comprising subjecting a solution of L-thyroxine or a salt thereof to ultrasonic agitation at a temperature and for a period of time sufficient to produce a crystalline form of said L-thyroxine.

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