Stabilised aluminosilicate slurries
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United States of America Patent
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Issued Date -
Mar 9, 2006
app pub date -
Oct 22, 2003
filing date -
Oct 30, 2002
priority date (Note) -
Abandoned
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Abstract
An aqueous slurry according to the invention comprises (a) a crystalline aluminosilicate represented by the empirical formula M.sub.2/nO Al.sub.2O.sub.3.xSiO.sub.2.yH.sub.2O wherein M represents a first metal moiety, said first metal having a valency of n, x indicates the ratio of atoms of silicon to atoms of aluminium and y indicates the ratio of molecules of water to atoms of aluminium, (b) a salt of a second metal selected from the group consisting of Group III metals, metallic elements of Group IV, magnesium, titanium, chromium, iron, nickel, copper, zinc, zirconium and silver, said salt of a second metal being present in an amount which is sufficient to replace from about 2.0 to about 40 per cent by weight of the first metal moiety, and (c) particulate silica having a BET surface area greater than 500 m.sup.2/g and a pore volume, as measured by nitrogen manometry of less than 2.1 cm.sup.3/g. The slurry is stable on storage but has a low viscosity at low shear rate.
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