Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – Clay
Reexamination Certificate
2007-06-05
2009-06-30
Wood, Elizabeth D (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
Clay
C502S085000, C502S400000, C502S401000, C502S417000
Reexamination Certificate
active
07553792
ABSTRACT:
The use of two mercury and arsenic removal media: A) a sulfur-impregnated organoclay; and B) a coupling agent-reacted organoclay, wherein the coupling agent preferably contains a mercapto, disulfide, tretrasulfide and/or polysulfide end group provides mercury removal media having increased reactivity, stability, and synergistic mercury removal ability. The preferred mercury removal media described herein is prepared by reacting an organophilic clay containing onium ions A) with elemental sulfur; and B) with a sulfur-containing coupling agent, preferably containing a mercapto, disulfide, tetrasulfide, and/or polysulfide moiety.
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Abraham Robert
Wang Zhen
Amcol International Corporation
Marshall & Gerstein & Borun LLP
Wood Elizabeth D
LandOfFree
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