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US 8,075,811 B2Granted
Method for manufacturing particulate chemical substances and particulate products of such substances
AssigneeSeiko Chemical Co., Ltd.
InventorsHiroshi Harada, Shinichi Miyamoto
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Abstract
Particulate chemical substances and method of manufacturing thereof wherein the resultant particles have a narrow particle size distribution and sufficient hardness to ensure that particles can withstand intact being driven through pneumatic transportation equipment. The method comprises granulating raw material using a spray granulation apparatus having a nozzle plate equipped with nozzle pipes having a length in the range of 2-100 mm.
Claims7
A method for manufacturing a particulate chemical substance, the method comprising:
- providing a spray granulation apparatus comprising a nozzle plate base comprising a rigid, substantially planar plate having a plurality of nozzle holes therein, each for receiving a nozzle pipe;
- and a plurality of nozzle pipes extending downwardly from the nozzle holes, the axes of the nozzle pipes being substantially parallel to each other, and each of the nozzle pipes having a length of 2 to 100 mm, measured from the surface of the nozzle plate base to the tip of the nozzle pipe;
- and
- dropping from the plurality of nozzle pipes, and under pressure, a molten chemical substance, the chemical substance having a melting point of 50 to 250° C., to be granulated through said nozzle plate, without vibrating the molten chemical substance.
1 more element
Dependencies are inferred from the claim text.