Surface-reacted calcium carbonate with functional cations
AssigneeOmya International AG
InventorsDaniel E. GERARD, Samuel RENTSCH, Matthias WELKER, Simon URWYLER, Joachim GLAUBITZ, Martina Elisabeth KNUPFER, Patrick A. C. GANE
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Abstract
A process of producing a surface-reacted calcium carbonate is described. In embodiments, a calcium carbonate-comprising material is treated with at least one H3O+ ion donor, carbon dioxide, and at least one water-soluble metal cation source in an aqueous medium to form an aqueous suspension of surface-reacted calcium carbonate. A surface-reacted calcium carbonate obtained by said process and its use are also described.
Claims33
A process of producing a surface-reacted calcium carbonate, the process comprising the steps of:
- a) providing a calcium carbonate-comprising material,
- b) providing at least one H3O+ ion donor,
- c) providing at least one water-soluble metal cation source, and
- d) treating the calcium carbonate-comprising material of step a) with the at least one H3O+ ion donor of step b) and carbon dioxide in an aqueous medium to form an aqueous suspension of surface-reacted calcium carbonate,
- wherein the carbon dioxide is formed in-situ by the H3O+ ion donor treatment and/or is supplied from an external source, and
- wherein the at least one water-soluble metal cation source of step c) is added during step d).
Dependencies are inferred from the claim text.