Process of manufacturing a co-ground calcium carbonate mineral of the GCC and PCC type with a specific steepness factor, obtained products and their uses
US8517291B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2006 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Apr 20, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process of manufacturing co-ground calcium carbonate material made of ground calcium carbonate (GCC) and precipitated calcium carbonate (PCC). The process includes 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, to obtain a co-ground calcium carbonate material having a steepness factor of at least 30; (c) optionally screening and/or upconcentrating the co-ground calcium carbonate material obtained following step (b); and (d) optionally drying the co-ground calcium carbonate material obtained following step (b) or (c).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.