| 摘要 |
1346295 Egtractiog of metal values using gels UNITED KINGDOM ATOMIC ENERGY AUTHORITY 19 May 1971 [27 May 1970] 25600/70 Heading B1X [Also in Division C1] Metal values are extracted from their solutions by contacting the solution with a hydrous metal containing gel prepared by precipitation from a mixture of a salt solution, a solution of the gel metal and a water soluble polymeric organic compound, and thereafter desorbing the metal value by contacting the gel with a desorbing liquid. The metal value may be sorbed onto the gel by passage of the solution through a column of particulated gel or by mixing the solution with the gel particles followed by filtering or centrifuging. The desorption liquid may contain a complexing agent for one or more of the sorbed metal values. Exemplified hydrous gels are Fe 2 O 3 / guar gum, Al 2 O 3 /guar gum, Cr 2 O 3 /guar gum, ThO 2 /guar gum and thorium phosphate/dextran. Metal values exemplified include Na, Fe Co, Ni as sulphate solutions, Cu as sulphate and nitrate solutions. Desorption liquids exemplified include aqueous NH 4 OH, 75%/25% pyridine-water, aqueous NH 4 OH/NH 4 Cl and aqueous phenol (for Na). |
