Production of vermiculite products
AssigneeImperial Chemical Industries PLC
InventorsKevin T. McAloon, Iona E. Heeson, Gordon E. Cleaver
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Abstract
A process for producing solid vermiculite products which are stable in water which comprises incorporating a source of ammonia or ammonium ions or a basic substance, preferably urea, in an aqueous suspension of vermiculite lamellae, shaping the suspension and removing water from the suspension by heating the shaped suspension at a temperature above 100.degree. C., preferably above 150.degree. C., such that ammonia or a basic substance is liberated within the suspension. The invention includes an aqueous suspension of vermiculite lamellae containing a source of ammonia or ammonium ions or a basic substance and a dry-powder mixture of vermiculite lamellae and a source of ammonia or ammonium ions or a basic substance.
Claims16
A process for the production of solid vermiculite products which are stable in water which comprises shaping an aqueous suspension of vermiculite lamellae and removing water from the suspension wherein prior to removal of water from the suspension there is incorporated in the suspension a source of ammonia or ammonium ions and wherein during removal of water from the suspension the shaped suspension is heated at a temperature greater than 100.degree. C. such that ammonia or ammonium ions is liberated within the suspension.
A suspension of vermiculite lamellae in a liquid medium containing a source of ammonia or ammonium ions.
A dry-powder composition comprising vermiculite lamellae and a source of ammonia or ammonium ions.
Dependencies are inferred from the claim text.