Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2008-03-19
2011-11-15
Gakh, Yelena G (Department: 1777)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S600000, C210S660000, C210S663000, C210S665000, C210S667000
Reexamination Certificate
active
08057683
ABSTRACT:
The present invention relates to the removal of endocrine disrupting compounds from an aqueous medium by adding surface-reacted natural calcium carbonate or an aqueous suspension comprising surface-reacted calcium carbonate and having a pH greater than 6.0 measured at 20° C., to the medium, wherein the surface-reacted calcium carbonate is a reaction product of natural calcium carbonate with carbon dioxide and one or more acids, the use of the surface-reacted natural calcium carbonate for the removal of endocrine disrupting compounds, as well as to a combination of a surface-reacted natural calcium carbonate and activated carbon for the removal of endocrine disrupting compounds.
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Gane Patrick A. C.
Gantenbein Daniel
Gerard Daniel E.
Schölkopf Joachim
Amster Rothstein & Ebenstein LLP
Arnold Craig J.
Gakh Yelena G
Omya Development AG
Weisz David
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