Zincoaluminosilicates of the FAU structure

摘要

A method of separating a more strongly adsorbable component from one or more less strongly adsorbable components residing in a gaseous mixture comprising contacting the gaseous mixture at elevated pressure with a composition and adsorbing the more strongly adsorbed gas specie on the composition, wherein the composition is represented by the formulaMn+(2x+y)/n[Si(2-x-y)Al(y)Zn(x)]O4;wherein M is cation selected from Groups 1, 2, 7, 10, 11, 12 and the f block elements as defined by the Periodic Table of the elements as adopted by IUPAC; n is the valence of the selected cation; M; x is greater than or equal to 0.02 but less than or equal to 1; y is a value less than or equal to 0.98; and 2x+y is greater than or equal to 0.80; wherein the composition of matter has a FAU structure and zinc resides in-tetrahedral positions in the framework of the FAU structure.