Pigment Red 60 micronization using supercritical fluids based techniques

Using SAS, we obtained Disperse Red 60 as spherical nano-particles with mean diameters ranging between 50 and 100 nm. Very long needle-like crystals were also obtained at some process conditions. Using SAA, quasi-spherical crystals with mean diameters ranging between 0.5 and 2.5 μm were produced. Therefore, in the case of Disperse Red 60, the two processes demonstrate to be complementary: nanometric particles can be obtained using SAS, whereas micrometric particles are produced using SAA.