To eliminate the generation of aggregation, precipitation, and diffusion and to produce stable fine particles efficiently by dissolving two kinds of substances in different compressible supercritical fluids, making the substances penetrate into each other in conditions in which the dissolution limit of one substance exceeds earlier than that of the other substance.
When substances A, B are dissolved in a supercritical fluid, and the pressure of the solution is reduced along a pressure holding section to produce stable fine particles, the substances A, B are dissolved in different compressible supercritical fluids. In conditions in which the dissolution limit of the substance A exceeds earlier than that of the substance B, the substances are made to penetrate into each other. For example, fluids are passed from both supply lines 1, 5 through both high pressure autoclaves 2, 6, where the substances A, B are taken out. Both supply lines 3, 7 are connected to both pressure reducing apparatuses 4, 8, and the mixing of the fluids before pressure reduction is prevented. Moreover, the particles 10 of the substance A are coated with the substance B.
LUEDDECKE ERIK
HORN DIETER DR
Next Patent: ULTRAVIOLET TREATMENT METHOD