Dompe Pha.r.ma S.p.a.

Cesare Di Palma

Matteo Putrignano

Gabriele Di Giacomo

Giovanni Del Re

Maria Candida Cesta

Marco Maria Gentile

An apparatus is described for micron and submicron particles formation of a substance using the GAS process, comprising a particles formation vessel () and means for introducing a solution of the substance and a supercritical fluid into the particles formation vessel (), wherein said means comprise a nozzle () having a central orifice () serving to carry a flow of solution, and a plurality of separate outer orifices () serving to carry a flow of pure supercritical fluid or a flow of supercritical fluid mixed with a modifier, such that the solvent is extracted from the solution by the supercritical fluid and precipitation of micron and submicron particles occurs. Also a process is described, carried out with such an apparatus.

Apparatus and method for micron and submicron particle formation

A process for the co-precipitation of a substance with a stabilizer therefor, by a gas anti solvent process comprising introducing into a particle formation vessel a supercritical fluid pure or mixed with a modifier; and a solution comprising said substance and said stabilizer dissolved in a solvent; so as said solvent is extracted from the solution by said supercritical fluid and co-precipitation of the substance and stabilizer occurs. The process may be carried out using an apparatus, for example, shown in FIG., comprising a particle formation vessel () and a nozzle () having a central orifice () serving to introduce a solution of the substance and a plurality of outer orifices () serving to carry a flow of supercritical fluid into the particle formation vessel (), such that the solvent is extracted from the solution by the supercritical fluid and precipitation of micron sized particles of the substance/stabilizer occurs.

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