Catalyst – solid sorbent – or support therefor: product or process – Solid sorbent – Organic
Reexamination Certificate
2006-10-03
2006-10-03
Johnson, Edward M. (Department: 1754)
Catalyst, solid sorbent, or support therefor: product or process
Solid sorbent
Organic
C502S407000, C502S439000
Reexamination Certificate
active
07115542
ABSTRACT:
Hollow glass microspheres obtained from fly ash (cenospheres) are impregnated with extractants/ion-exchangers and used to remove hazardous material from fluid waste. In a preferred embodiment the microsphere material is loaded with ammonium molybdophosphonate (AMP) and used to remove radioactive ions, such as cesium-137, from acidic liquid wastes. In another preferred embodiment, the microsphere material is loaded with octyl(phenyl)-N-N-diisobutyl-carbamoylmethylphosphine oxide (CMPO) and used to remove americium and plutonium from acidic liquid wastes.
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Tranter, T. J. et al., “Evaluation of Ammonium Molybdophosphate-Polyacrylonitrile (AMP-PAN) as a Cesium Selective Sorbent for the Removal of Cs-137 from Acidic Nuclear Waste Solutions”, Advances in Environmental Research, vol. 6, Issue 2, pp. 107-121, Mar. (2002).
Aloy Albert S.
Anshits Alexander G.
Burchfield Larry A.
Knecht Dieter A.
Sapozhnikova Natalia V.
Gottlieb Paul A.
Johnson Edward M.
Moody Julia Cook
The United States of America as represented by the United States
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