Process for preparing surface-reacted calcium carbonate
US12275853B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Apr 7, 2020 |
| Grant date | Apr 15, 2025 |
| Priority date | — |
| Expiry date | Jul 11, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for producing a surface-reacted calcium carbonate, wherein a calcium carbonate-comprising material is treated with at least one inorganic acid and carbon dioxide in an aqueous medium to form an aqueous suspension of surface-reacted calcium carbonate, wherein the at least one water-soluble, inorganic magnesium salt is added before, during and/or after the treatment step. Furthermore, the present invention relates to a surface-reacted calcium carbonate obtained from said process and its use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.