Ion exchange resins for uranium recovery
AssigneeThe Dow Chemical Company
InventorsJohn M. Lee, William C. Bauman
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Abstract
The density and capacity of macroporous ion exchange resins are increased by incorporating therein at least one of titania hydrate, zirconia hydrate, hydrated titanium phosphorous, and hydrated zirconium phosphate hydrates. Such resin composites are useful, e.g., in removing uranium values from aqueous solutions.
Claims15
A resin composite comprising macroporous particles of ion exchange resin having post-deposited therein at least one hydrous metal oxide selected from the group comprising titania hydrate, zirconia hydrate, hydrated titanium phosphate, and hydrated zirconium phosphate.
A method for preparing a resin composite, said composite comprising macroporous particles of ion exchange resin having post-deposited therein at least one hydrous metal oxide selected from the group comprising titania hydrate, zirconia hydrate, hydrated titanium phosphate, and hydrated zirconium phosphate, said method comprising
- mixing with said resin an aqueous solution of the requisite compound or compounds of titanium and/or zirconium,
- adding an alkalizing agent to said aqueous solution thereby precipitating said requisite compound or compounds as metal oxide hydrates,
- washing out excess alkalizing agent and any soluble alkali compounds which are formed, and optionally, reacting said metal oxide hydrates with soluble phosphate values.
A method of removing uranium values from an aqueous solution, said method comprising
- intimately contacting said aqueous solution with an ion exchange resin and removing uranium-depleted solution from said resin,
- wherein said resin comprises a macroporous ion exchange resin having incorporated therein at least one hydrous metal oxide selected from the group comprising titania hydrate, zirconia hydrate, hydrated titanium phosphate and hydrated zirconium phosphate.
Dependencies are inferred from the claim text.