Process for the control of pitch
AssigneeOmya Development AG
InventorsPatrick A.C. Gane, Joachim Schölkopf, Daniel Gantenbein
Life of this patent
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Abstract
The present invention relates to a process for the control of pitch in an aqueous medium by adding surface-reacted natural calcium carbonate or an aqueous suspension comprising surface-reacted calcium carbonate and having a pH greater than 6.0 measured at 20° C., to the medium, wherein the surface-reacted calcium carbonate is a reaction product of natural calcium carbonate with carbon dioxide and one or more acids, the use of the surface-reacted natural calcium carbonate for pitch control, as well as to a combination of a surface-reacted natural calcium carbonate and talc for pitch control, and the resulting composites.
Claims4
1-25. (canceled)
A combination of a surface-reacted natural calcium carbonate and talc for pitch control, wherein the surface-reacted calcium carbonate is a reaction product of natural calcium carbonate with carbon dioxide and one or more acids.
A composite of surface-reacted natural calcium carbonate and pitch removed from an aqueous medium, wherein the surface-reacted calcium carbonate is a reaction product of natural calcium carbonate with carbon dioxide and one or more acids.
Dependencies are inferred from the claim text.