Solid material comminution or disintegration – Processes – By utilizing kinetic energy of projected or suspended material
Patent
1984-02-27
1986-09-09
Rosenbaum, Mark
Solid material comminution or disintegration
Processes
By utilizing kinetic energy of projected or suspended material
241 18, 241 25, 241 40, 241152R, B02C 1906
Patent
active
046103953
ABSTRACT:
A process and apparatus are disclosed for treatment of crystalline, particulate phthalocyanine pigments, and particularly for green shade phthalocyanine blue pigments. To effect development of the pigment tinctorial strength by reduction of the pigment particle size, the pigment particles are repeatedly impacted against relatively fixed impact plates by entrainment in moving air streams. Repeated impacting of the particulate pigment provides significant reduction in its particle size and significant development of the tinctorial strength of the pigment. It is presently preferred that the impacting steps be carried out in conjunction with subsequent viscous grinding of the partially developed pigment. This combination of treatment steps has been found to provide a resultant product of significantly enhanced tinctorial strength, while at the same time affording significant savings in materials, process time, and energy usage.
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Eley Timothy V.
Rosenbaum Mark
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