Method of preparing low-crystallinity oltipraz or amorphous...

Details Method of preparing low-crystallinity oltipraz or amorphous... Method of preparing low-crystallinity oltipraz or amorphous...

A - Human Necessities

61

K

A61K 9/16 (2006.01) A61K 31/4965 (2006.01) A61P 1/16 (2006.01)

Patent

CA 2554588

Provided is a method of preparing low-crystallinity oltipraz or amorphous oltipraz. The method includes: obtaining a mixed solution containing oltipraz and a water-soluble polymer or a water-insoluble polymer in a solvent, the solvent being an organic solvent or purified water; and solid-dispersing the oltipraz in the polymer. In the solid-dispersing, the mixed solution may be spray dried using a spray dryer or granulated using a fluid bed granulator.

L'invention concerne une méthode de préparation d'un oltipraz de faible cristallinité ou d'un oltipraz amorphe. La méthode consiste à mettre en oeuvre dans un solvant une solution mixte contenant oltipraz et un polymère soluble dans l'eau ou un polymère insoluble dans l'eau, ledit solvant étant un solvant organique ou de l'eau purifiée. La méthode consiste ensuite à disperser par voie solide l'oltipraz dans le polymère. Au cours de la phase de dispersion par voie solide, la solution mixte peut être séchée par atomisation au moyen d'un séchoir-atomiseur, ou granulée au moyen d'un moulin à lit fluidisé.

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