Method of preparing colloidal sol of antimony oxide
AssigneeThe Harshaw Chemical Company
InventorsReginald P. Gower, II, John G. Richardson
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Abstract
A method of preparing a colloidal aqueous dispersion of antimony pentoxide from substantially water-insoluble metal antimonate is described. The method comprises contacting an aqueous slurry of the metal antimonate with a cation exchange resin whereby the metal antimonate is converted to the colloidal antimony pentoxide. A preferred method involves passing the slurry of metal antimonate through a fluidized bed containing a cation exchange resin. The colloidal sols obtained in the prescribed manner are useful as flame retardants when combined with halogen compounds.
Claims4
A method of preparing a colloidal aqueous sol of antimony pentoxide from a water-insoluble metal antimonate comprising:
- (a) preparing an aqueous slurry of a water-insoluble metal antimonate, and
- (b) passing the aqueous slurry through a fluidized bed containing a cation exchange resin whereby metal antimonate is converted to colloidal antimony pentoxide.
A method of preparing a colloidal aqueous sol of antimony pentoxide from sodium antimonate comprising:
- (a) preparing an aqueous slurry of sodium antimonate, and
- (b) passing said slurry through a fluidized bed containing a cation exchange resin whereby sodium antimonate is converted to colloidal antimony pentoxide.
Dependencies are inferred from the claim text.