Uop Lcc

Evgeny Kolev

Gregory John Lewis

Paulina Jakubczak

Mimoza Sylejmani-Rekaliu

William Christopher Sheets

James M Hodges

A new family of rare-earth silicate compositions and the synthetic methods used to prepare them. The materials have open-framework structures and are characterized by their ion-exchange properties. They are represented by the following empirical formula:AMM'SiOwhere A is an exchangeable cation such as sodium, M is at least one element selected from the group of rare-earth elements, and M′ is a framework metal having a valence of +2, +3, +4, or +5. The rare-earth silicate materials have utility in various cation-exchange applications such as dialysis and removal of toxic metals from the gastrointestinal tract.

Rare-earth silicate compositions and their preparation

A process for removing Pbtoxins from bodily fluids involves contacting the bodily fluid with an ion exchange composition to remove the metal toxins in the bodily fluid, including blood and gastrointestinal fluid. Alternatively, blood can be contacted with a dialysis solution which is then contacted with the ion exchange composition. The ion exchange compositions are represented by the following empirical formula:ATiNbSiOhaving either the pharmacosiderite, sitinakite, pharmacosiderite-sitinakite intergrowth topologies or mixtures thereof. There are also compositions comprising the above ion exchange compositions in combination with bodily fluids or dialysis solution. The ion exchange compositions may be supported by porous networks of biocompatible polymers such as carbohydrates or proteins.

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Arlington Heights, IL, United States of America

Evgeny Kolev