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US 4,284,726 AGranted
Composite anion adsorbent and method for making same
OwnerYasumasa Shigetomiinventor
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Abstract
A composite anion adsorbent which includes a dehydration cured composite gel of an organic hydrophilic polymer and a metal hydroxide. In the preferred embodiment, the metal hydroxide is a hydroxide such as iron hydroxide, aluminum hydroxide, titanium hydroxide, manganese hydroxide, tin hydroxide and zirconium hydroxide and oxides which form hydroxides in aqueous solutions.
Claims4
A method for producing a composite anion adsorbent comprising the steps of:
- preparing organic hydrophilic polymer gel using a compound selected from the group consisting of formalin-crosslinked polyacrylamide, formalin-crosslinked polyvinyl alcohol, metal-crosslinked polyvinyl alcohol, urea-formaldehyde, and formalin-crosslinked dibenzalsorbitol;
- mixing into the organic hydrophilic polymer gel an inorganic adsorbent or combination thereof selected from the group consisting of iron hydroxide, hydrated iron oxide, aluminum hydroxide, hydrated aluminum oxide, titanium hydroxide, hydrated titanium oxide, titanic acid, manganese hydroxide, hydrated manganese oxide, tin hydroxide, stannic acid, zirconium hydroxide, hydrated zirconium oxide;
- and
- dehydrating the mixture thus prepared under 50.degree.-100.degree. C.
1 more element
Dependencies are inferred from the claim text.