Dewatering of calcium carbonate

Details Dewatering of calcium carbonate Dewatering of calcium carbonate

C - Chemistry, Metallurgy

01

F

C01F 11/18 (2006.01) D21H 19/38 (2006.01)

Patent

CA 2274953

The present invention relates to dewatering of an aqueous slurry of calcium carbonate. More particularly, the present invention relates to the use of non- ionic surfactants in dewatering aqueous slurries of an aragonitic precipitated calcium carbonate. Calcium carbonate slurries dewatered using the non-ionic surfactants of the present invention have higher weight percent solids, decreased dispersant demand, and result in higher productivity.

Cette invention concerne la déshydratation d'une bouillie aqueuse de carbonate de calcium. Elle concerne plus particulièrement l'utilisation de tensioactifs non ioniques pour déshydrater des bouillies aqueuses d'un carbonate de calcium précipité sous forme d'aragonite. Les bouillies de carbonate de calcium, déshydratées à l'aide des tensioactifs de la présente invention, possèdent une teneur pondérale accrue en éléments solides, elles requièrent une quantité réduite d'agents de dispersion et permettent d'accroître la productivité.

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