Patent ID: 7291295

Claim:
Method for obtaining finely divided solid particles which comprises: a) Dissolving a compound C in a fluid A in order to provide a solution A; b) Thermostatization of said solution A at a temperature T ranging between −50° C. and 200° C.; c) Adding a fluid B to said solution A until a pressure P is obtained, characterized in that said fluid B at pressure P and temperature T is miscible with said solution A and acts as a co-solvent in forming a solution AB; d) Adding an inert gas to solution AB so as to maintain the pressure P, and e) Reducing the pressure of said solution AB so as to produce the precipitation of said compound C in the form of a finely divided solid particle; wherein compound C is selected from the group consisting of drugs, explosives, colorants, pigments, cosmetics, polymers, catalysts, and chemical products for agriculture; wherein fluid A is selected from the group consisting of polar solvents and non-polar solvents; wherein fluid B is selected from the group consisting of liquids and supercritical fluids, which behave as a liquid at said pressure P and temperature T, and as a gas at the discharge pressure and temperature, and are miscible with said fluid A and said solution A or only with said solution A at said pressure P and temperature T; and wherein said inert gas is any gas, other than said fluid A and fluid B, that does not interfere with the solubility of compound C in fluid A and fluid B or modify their chemical composition.