Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1996-05-20
1997-09-16
Group, Karl
Liquid purification or separation
Processes
Ion exchange or selective sorption
210687, 210688, C02F 142
Patent
active
056676956
ABSTRACT:
This invention relates to a process for removing contaminant metal ions from a liquid stream. The process involves contacting the liquid stream with a crystalline molecular sieve having the pharmacosiderite structure and having germanium and M metals as framework elements. Optionally, titanium and silicon can also be framework elements. The M metals can be any metal which has octahedral coordination and has a valence of +2, +3, +4 or +5. Illustrative of these M metals are niobium, tin, antimony, aluminum, gallium and tantalum. These molecular sieves are particularly effective in removing cesium and strontium ions from aqueous streams.
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Bedard Robert L.
King Lisa M.
Sherman John D.
Group Karl
McBride Thomas K.
Molinaro Frank S.
Sample David
Snyder Eugene I.
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