Patent ID: 8002887
Filing Date: 2011-08-23
Classification: C01F,C01P,C09C,Y10T

Abstract:
1. A process of manufacturing a co-ground calcium carbonate material comprising GCC and PCC, said process comprising the steps of: (a) providing GCC in an aqueous suspension, (b) co-grinding the aqueous suspension of GCC and an aqueous suspension of PCC, optionally with at least another mineral material, (c) optionally screening and/or upconcentrating the co-ground calcium carbonate material obtained following step (b), (d) optionally drying the co-ground calcium carbonate material obtained following step (b) or (c), wherein the material obtained from step (b) is characterized as having greater than 95% particles finer than 1 μm and a BET specific surface area less than 25 m 2 /g.