Patent ID: 6063138
Filing Date: 2000-05-16
Classification: A61K,B01D,B01J,Y02P

Abstract:
A method for forming a particulate product, the method comprising (a) co-introducing into a particle formation vessel, the temperature and pressure in which are controlled, a supercritical fluid; a solution or suspension of a substance in a first vehicle; and, separately from the solution or suspension, a second vehicle which is substantially soluble in the supercritical fluid; and (b) using the supercritical fluid to disperse the solution or suspension and the second vehicle, and to extract the vehicles, substantially simultaneously and substantially immediately on introduction of the fluids into the particle formation vessel, wherein the first and second vehicles may mix to allow their extraction together into the supercritical fluid, and wherein contact between the solution or suspension and the second vehicle occurs either substantially simultaneously with, or immediately before, dispersion of the solution or suspension and the second vehicle by the action of the supercritical fluid and extraction of the vehicles by the supercritical fluid.