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Stable shaped particles of crystalline organic compounds

  • US 7,427,413 B2
  • Filed: 02/26/2003
  • Issued: 09/23/2008
  • Est. Priority Date: 02/25/1998
  • Status: Expired due to Fees
First Claim
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1. A method for effecting solid state crystallization of shaped particles of allotropic organic compounds comprising:

  • a) creating a mixture consisting essentially of two or more allotropic organic compounds wherein each of the compounds is of mixed crystalline, amorphous, or both crystalline and amorphous form;

    b) fabricating said mixture into a plurality of spherical particles;

    c) exposing said spherical particles to an atmosphere containing vapors of one or more solvents for each of said allotropic organic compounds for a time sufficient to effect a solid state crystallization of each of said allotropic organic compounds to its most stable crystalline form; and

    d) recovering said particles;

    wherein the recovered particles retain spherical shape on storage in aqueous media for at least about one month.

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