A process for the preparation of a dispersion of crystalline nano-particles in an aqueous medium comprising combining (i) a first solution comprising a substantially water-insoluble substance in a water-miscible organic solvent with; (ii) an aqueous phase comprising water and optionally a stabiliser, to form a dispersion of amorphous particles; and (iii) sonicating the dispersion of amorphous particles for a sufficient period to form crystalline nano-particles of the substantially water-insoluble substance. The process provides nano-crystals with a mean hydrodynamic diameter of less than 1 micron, particularly less than 300 nm and is particularly useful for the preparation of nano-crystalline dispersions of pharmaceutical substances.
一种在
水介质中制备结晶纳米颗粒分散液的工艺,包括将(i)第一溶液(包括在
水可混溶的有机溶剂中的基本不溶于
水的物质)与(ii)
水相(包括
水和可选的稳定剂)相结合,以形成无定形颗粒分散液;以及(iii)将无定形颗粒分散液超声足够长的时间,以形成基本不溶于
水的物质的结晶纳米颗粒。该工艺提供的纳米晶体的平均
水动力直径小于 1 微米,特别是小于 300 纳米,特别适用于制备药物物质的纳米晶体分散体。