Particle size reduction using supercritical materials

Details Particle size reduction using supercritical materials Particle size reduction using supercritical materials

B - Operations, Transporting

02

C

B02C 23/18 (2006.01) C08J 3/12 (2006.01) C08L 95/00 (2006.01)

Patent

CA 2356800

The present invention relates to a method of reducing particle size by the use of a supercritical gas, such as carbon dioxide or a refrigerant. The material is swollen by the supercritical gas at a high pressure. After the material has been allowed to swell under a high pressure, the pressure is rapidly dropped. When the external pressure is rapidly dropped, the material explodes as the supercritical gas absorbed into the material rapidly expands outward.

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