Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2007-12-18
2007-12-18
Barry, Chester T. (Department: 1724)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S688000, C210S912000, C210S913000, C210S914000
Reexamination Certificate
active
11031088
ABSTRACT:
The present invention relates to compositions and methods for the removal of toxic metals or radionuclides from source materials. Toxic metals may be removed from source materials using a clay, such as attapulgite or highly cationic bentonite, and chitin or chitosan. Toxic metals may also be removed using volcanic ash alone or in combination with chitin or chitosan. Radionuclides may be removed using volcanic ash alone or in combination with chitin or chitosan.
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Cuero Raul G.
McKay David S.
Baker & Botts L.L.P.
Barry Chester T.
The Texas A&M University System
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