| Effect of K3PO4, K2HPO4, KH2PO4 and H3PO4
as Dispersing Agents on the Rheological
Behaviour of Kaolin Suspensions |
Rym Dhouib Sahnoun*, Alya Charfi and Jamel Bouaziz
pages : 193-196
DOI : 10.1080/0371750X.2014.882245 |
| Abstract |
| Effects of phosphate addition on the rheological properties of kaolin suspensions were investigated. Various
phosphate compounds were added, such as orthophosphoric acid (H3PO4), potassium dihydrogen phosphate
(KH2PO4), potassium monohydrogen phosphate (K2HPO4) and potassium phosphate (K3PO4). The rheological
properties of kaolin suspensions were studied in connection with the mass ratios of kaolin and dispersants. The
obtained data showed that the viscosity decreased according to the order: H3PO4KH2PO4K2HPO4K3PO4. Use of
K3PO4 as a dispersant led to the reduction of viscosity of the kaolin suspension to 1/6th of that of the original one
even when it was used at a lower rate of about 0.05 wt%.
[Keywords: Kaolin, Rheology, Phosphates, Suspension, Dispersant] |
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