The Deflocculation of Kaolin Suspensions – the Effect of Various Electrolytes

0397736 - ÚCHP 2014 CZ eng C - Conference Paper (international conference)
Pěnkavová, Věra - Guerreiro, M. - Tihon, Jaroslav
The Deflocculation of Kaolin Suspensions – the Effect of Various Electrolytes.
Sborník. Praha: Česká společnost chemického inženýrství, 2013, s. 61. ISBN 978-80-02-02500-9.
[Konference chemického a procesního inženýrství CHISA 2013 /60./. Srní, Šumava (CZ), 14.10.2013-17.10.2013]
R&D Projects: GA ČR(CZ) GAP101/12/0585
Institutional support: RVO:67985858
Keywords : kaolin suspensions * deflocculants * viscosity measurements
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
www.chisa.cz/2013

The deflocculation effect of conventional additives to kaolin suspensions is evaluated from the results standard rheological measurements. Several widely used electrolytes (NaOH, Na2CO3, Na2SiO3, SHMP = sodium hexametaphosphate, and CMC = sodium salts of carboxymethylcellulose) have been tested. The optimal concentrations of these deffloculants, in respect to reaching the maximum reduction of initial suspension viscosity, are found. The stability of deflocculated kaolin suspensions against sedimentation is evaluated and different aspects of the observed flow enhancement discussed. Inorganic electrolytes are found to be more effective in viscosity reduction, but on the other hand, low-molecular organic CMC additives produce more stable final suspensions.
Permanent Link: http://hdl.handle.net/11104/0225371