Dependence of in situ precipitate deposition on flow characteristics in multi-permeability porous media

Previous studies have shown that displacement washing of kraft pulp pads can be improved by the addition of cationic polymer to the wash water. The washing efficiency improvements are due to in situ precipitate formations which develop and deposit in the high permeability zones of the pad and consequently divert washing fluids to the lower permeability zones. To determine whether there is a relationship between the fluid flow profile and the …