Aluminosilicate cation exchange compounds
OwnerJohn Gerard Thompson, Sasha Koun +2inventors
InventorsJohn Gerard Thompson, Sasha Koun, Raymond Leslie Withers, Stephen Ronald Palethorpe
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Abstract
Poorly or partly crystalline alkali metal aluminosilicate materials have stuffed silica polymorph related-structures in which the aluminium is at least predominantly tetrahedrally coordinated and cation exchange capacities at room temperature of at least 1 meq 100 g.sup.-1 in aqueous solution. The materials are produced by reacting an aluminosilicate, or a combination of aluminium oxide-containing and silicon oxide-containing compounds, with an alkali oxide-containing reagent. Preferably the reaction is a solid state reaction. Specific surfaces of the material are likely to be less than 45 m.sup.2 g.sup.-1. The preferred aluminosilicate reactants are kaolin group minerals.
Claims22
A poorly or partly crystalline alkali metal aluminosilicate material having a stuffed silica polymorph related-structure in which the aluminium is at least predominantly tetrahedrally coordinated and a cation exchange capacity at room temperature of at least 1 meq 100 g.sup.-1 in aqueous solution, which is produced by reacting an aluminosilicate, or a combination of aluminium oxide-containing and silicon oxide-containing compounds, with an alkali oxide-containing reagent.
A process for the preparation of a poorly or partly crsytalline alkali metal aluminosilicate material having a stuffed silica polymorph related-structure in which the aluminium is at least predominantly tetrahedrally coordinated and a cation exchange capacity at room temperature of at least 1 meq 100 g.sup.-1 in aqueous solution, in which an aluminosilicate, or a combination of aluminium oxide-containing and silicon oxide-containing compounds, are reacted together with an alkali oxide-containing reagent.
Dependencies are inferred from the claim text.