| 摘要 |
<p>A method for beneficiating a kaolin clay pigment to improve the rheological properties of a high solids suspension subsequently formed therefrom, wherein a 10 to 20% solids aqueous suspension of a kaolin clay (A) is subjected to a selective rheological separation, by mixing the suspension with from about .001% to 0.1% by weight of dry clay of a high molecular weight anionic polymer (B) and allowing the thereby treated suspension to separate into a sedimented phase (C) and a supernatant phase (D), substantially free of aggregates; separating (E) the supernatant phase containing the beneficiated kaolin pigment in suspension. The suspended product can then be conventionally processed, by reductive bleaching, floccing, filtering, washing, dispersing and drying.</p> |
