GRANULATED CARBON-BLACK Russian patent published in 2008 - IPC C09C1/58 B01J2/10 

FIELD: chemistry.

SUBSTANCE: invention is intended for chemical industry and can be applied in production of varnishes, paints, pigments and polymer compositions, such as rubber mixes. Non-granulated carbon-black is charged into rapid granulation machine, carbon-black amount maintained at constant level. Water under pressure of 3-5 bar is injected through nozzles attached in pairs to two holders positioned as close to granulation machine as possible. Water jet cones dispersed by nozzles are oriented along carbon-black flow direction at an angle of 10 to 90° to it. In one version, granulated carbon-black has oil absorption power over 100 ml per 100 g and over 78 ml per 100 g after pressing, and includes less than 3.5 wt % of granule fraction of over 2.5 mm diametre, and over 22 wt % of granule fraction of 0.71 to 1.0 mm diameter. Hardness of single granules of 0.71 to 1.0 mm diameter fraction comprises 7.0 to 25.0 g. In another version, granulated carbon-black has oil absorption power under 90 ml per 100 g and under 78 ml per 100 g after pressing, and includes less than 30 wt % of granule fraction of of 0.71 to 1.0 mm diameter. Hardness of single granules of 0.71 to 1.0 mm diameter fraction comprises 7.0 to 25.0 g.

EFFECT: obtaining carbon-black with oil absorption power under 90 ml per 100 g and less than 30 wt % of granules with diameter of 0.71 to 1.0 mm.

5 cl, 3 tbl, 10 dwg, 2 ex