Method for obtaining precipitated calcium carbonate particles of nanometric scale structure
AssigneeSolvay (Societe Anonyme)
InventorsClaude Vogels, Karine Cavalier, Didier Sy, Roberto Rosa
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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%.
Claims11
Process for the production of precipitated calcium carbonate particles, structured at the nanoscale, by carbonation of milk of lime, characterized in that the carbonation is carried out in the presence of a crystallization controller selected from the following list:
- citric acid in a concentration of between 5 and 15%, polyacrylic acid with a molecular weight of between 500 and 15 000, dioctyl sodium sulphosuccinate and polyaspartic acid.
Precipitated calcium carbonate particles structured at the nanoscale, characterized in that they are composed of nanoplates combined as accordions.
Precipitated calcium carbonate particles structured at the nanoscale, characterized in that they are composed of nanofibres combined as faggots.
Dependencies are inferred from the claim text.