The invention is directed to a method of stabilizing metalloaluminophosphate
molecular sieves and catalysts derived therefrom. In particular, the invention
is directed to a method of treating such molecular sieves with one or more nitrogen
containing compounds having a kinetic diameter greater than the average pore size
of the activated molecular sieve and selected from the group consisting of amines,
monocyclic heterocyclic compounds, organonitrile compounds and mixtures thereof
to chemisorbed and/or physisorbed the compound onto the molecular sieve. The compounds
may be easily desorbed before or during use and after storage. The invention is
also directed to formulating the molecular sieve into a catalyst useful in a process
for producing olefin(s), preferably ethylene and/or propylene, from a feedstock,
preferably an oxygenate containing feedstock.
