Transitional metal containing zeolite with high hydrothermal stability, process for its manufacture and method of application

摘要

A transition metal-containing zeolite having a high hydrothermal stability having the formula, in terms of a molar composition of oxides: aA2O.bM2/nO.A l 2O3.cSiO2.dH2O (I) wherein a is 0.2 to 1.0, b is more than 0 but not more than 1.5, c is at least 10, d is an arbitrary number, A is potassium or cesium, M is a transition metal and n is a valence number of the metal M.