Process for preparing scalenohedral precipitated calcium carbonate
US9981855B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Oct 2, 2015 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Oct 2, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing slaking quick lime to obtain slaked lime; and subjecting the slaked lime, without agitation, without prior cooling in a heat exchanger, and in the absence of any additives, to carbonation with carbon dioxide gas to produce PCC. The newly prepared product develops better performance thanks to improved resistance during processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.