Process to disperse and/or grind and/or concentrate calcium carbonate in aqueous media using an aqueous solution containing zirconium compounds

摘要

The present invention is directed to a process for manufacturing a calcium carbonate product including the steps of (i) contacting calcium carbonate with of one or more zirconium compounds in an aqueous suspension and/or of an aqueous emulsion and/or of an aqueous solution to obtain a calcium carbonate-containing slurry, and (ii) dispersing the calcium carbonate-containing slurry to obtain a calcium carbonate product.

主权项

1. A process for manufacturing an aqueous dispersion or aqueous suspension of calcium carbonate comprising the steps of (i) contacting calcium carbonate with a dispersing aid agent in water to obtain a calcium carbonate-containing slurry, wherein the dispersing aid agent comprises a zirconium compound selected from the group consisting of ammonium zirconium carbonate, potassium zirconium carbonate, and mixtures thereof, and (ii) dispersing the calcium carbonate-containing slurry so that the dispersing aid agent is dispersed throughout the calcium carbonate-containing slurry to obtain an aqueous dispersion or aqueous suspension of calcium carbonate, wherein the aqueous suspension or aqueous dispersion of calcium carbonate so obtained consists of calcium carbonate, water, the zirconium compound and optionally one or more polyacrylates as a grinding agent or a dispersing agent or as both a grinding agent and a dispersing agent.