Method for obtaining precipitated calcium carbonate particles of nanometric scale structure
US7708973B2 · kind B2 · utility
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Key dates
| Filing date | Sep 26, 2008 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Sep 26, 2028 |
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.