Verfahren zur Herstellung von Phenothiazin-Granulat mit verbesserten Eigenschaften

摘要

The invention relates to a method for producing a phenothiazine granulate with a narrow particle size distribution. At least 98 % pure phenothiazine in liquid form is pressed through a device provided with boreholes and a frequency is applied to said liquid phenothiazine. The liquid phenothiazine discharged through the boreholes enters a cooling medium having a temperature of between-196 and + 120 DEG C. The drops of liquid phenothiazine thus produced are brought to a temperature below melting point and are optionally solidified in another post-cooling area. Optionally, fine-grain particles or coarse-grained particles thus formed can be subsequently removed by appropriate methods. The bulk density of the obtained phenothiazine granulates ranges more particularly from 720 - 780 kg/m<3>.