B - Operations – Transporting – 01 – F
Patent
B - Operations, Transporting
01
F
B01F 17/36 (2006.01) C09C 1/02 (2006.01)
Patent
CA 2699070
The invention relates to the use of phosphoric acid in a method for concentrating an aqueous dispersion or suspension of calcium carbonate in the presence of at least one acrylic dispersant, as an agent for reducing the amount of free dispersant, i.e. the fraction of the acrylic dispersant not adsorbed at the surface of the calcium carbonate particles and present in the aqueous phase. The invention also relates to aqueous dispersions and suspensions of calcium carbonate having a reduced free dispersant content.
L'invention consiste en l'utilisation d'acide phosphorique, dans un procédé de concentration d'une dispersion ou d'une suspension aqueuse de carbonate de calcium en présence d'au moins un dispersant acrylique, comme agent permettant de réduire la quantité de dispersant libre, soit la fraction de dispersant acrylique non adsorbée à la surface des particules de carbonate de calcium et présente en phase aqueuse. Elle concerne aussi les dispersions et les suspensions aqueuses de carbonate de calcium, présentant une quantité réduite de dispersant libre.
Jacquemet Christian
Mongoin Jacques
Coatex S.a.s.
Robic
LandOfFree
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