| 摘要 |
Disclosed is a granular calcium hypochlorite composition having a calcium hypochlorite content of at least 55 wt.% and composed of particles having an ellipsoidal shape in section, wherein at least 50 wt.% of the ellipsoidal particles have a short diameter of 0.3 - 5 mm, a long diameter of 0.5 - 20 mm, and a long diameter/short diameter ratio larger than 1.5 but not larger than 5. This composition is prepared by a process wherein a wet calcium hypochlorite composition comprising at least 40 wt.% of calcium hypochlorite and 25 - 45 wt.% of water is extruded through a die having an orifice diameter of 0.3 - 5 mm; the extrudate is cut to a length of 0.5 - 20 mm so that the length/orifice diameter ratio is larger than 1.5 but not larger than 5 to form columnar shaped particles; the columnar shaped particles are subjected to rolling granulation; and the resulting granules are dried until the water content is reduced to 4 - 22 wt.%. |
