ETS-4 Engelhard TitanoSilicate

The good news is that such a filter exists. Recent work by Steven Kuznicki and Valerie Bell at Engelhard Corporation in New Jersey and Michael Tsapatsis at the University of Massachusetts has produced a molecular sieve in which the pore (passage) sizes can be adjusted precisely enough to separate N2 molecules from CH4 molecules. The material involved is a special hydrated titanosilicate (contains H2O, Ti, Si, O, and Sr) compound patented by Engelhard known as ETS-4 (Engelhard TitanoSilicate-4). When... 

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