Mineral fillers

Details Mineral fillers Mineral fillers

C - Chemistry, Metallurgy

04

B

362/48

C04B 33/13 (2006.01)

Patent

CA 1096979

"Improvements in or relating to mineral fillers". ABSTRACT OF THE DISCLOSURE In a method of dewatering by pressure filtration an aqueous suspension of a clay containing a small proportion of particles having an equivalent spherical diameter smaller than 1 micron, the improvement which comprises treating the aqueous suspension of the clay, prior to dewatering by pressure filtration at a pressure in excess of 150 pounds-per square inch, with a water-soluble polyelectrolyte flocculant having a positive charge density greater than 1.0 x 10-3.

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