Process for producing phenothiazine granules

Details Process for producing phenothiazine granules Process for producing phenothiazine granules

2006-01-10

2006-01-10

Tyler, Cheryl (Department: 3744)

Refrigeration

Processes

Congealing flowable material, e.g., ice making

C062S063000, C062S066000

Reexamination Certificate

active

06983612

ABSTRACT:
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° 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/m3.

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