Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2011-01-18
2011-01-18
Savage, Matthew O (Department: 1776)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S688000, C210S691000, C210S912000, C210S914000
Reexamination Certificate
active
07871524
ABSTRACT:
The use of a coupling agent containing a mercapto, disulfide, tretrasulfide and/or polysulfide end group provides a mercury removal media having increased reactivity, stability, and mercury removal ability. The mercury removal media described herein is prepared by reacting an organophilic clay containing onium ions with a mercapto, disulfide, tetrasulfide, and/or polysulfide end moiety. Alternatively, the clay can be made organophilic by onium ion reaction prior to or simultaneously with the coupling reaction of the mercapto- or sulfide- end group-containing coupling agent.
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Abraham Robert
Wang Zhen
Amcol International Corporation
Marshall & Gerstein & Borun LLP
Savage Matthew O
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