Method for obtaining precipitated calcium carbonate particles of nanometric scale structure
US7501107B2 · kind B2 · utility
2Cited by
10References
14Claims
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Key dates
| Filing date | Jul 2, 2002 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Dec 13, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/265
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for the production of precipitated calcium carbonate particles, structured at the nanoscale, by carbonation of milk of lime in the presence of a crystallization controller selected from the following list: polyaspartic acid, dioctyl sodium sulphosuccinate, polyacrylic acid, the molecular weight of which is between 500 and 15 000, and citric acid. When the crystallization controller is citric acid, its concentration in the milk of lime is between 5 and 15%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.