Stabilised aluminosilicate slurries

摘要

An aqueous slurry comprises (a) a crystalline aluminosilicate represented by the empirical formula M_2/nO.Al₂O₃.xSiO₂.yH₂O wherein M represents a first metal moiety, said first metal having a valency of n, x is the molar ratio of silica to alumina and y indicates the molar ratio of water to alumina, (b) a mineral or organic acid, and (c) particulate silica. The silica may have a BET surface area greater than 500 m²/g and a pore volume, as measured by nitrogen manometry of less than 2.1 cm³/g. The slurry is stable on storage but has a low viscosity at low shear rate.