Patent ID: 6916965

Claim:
A method of treating a metalloaluminophosphate molecular sieve, which method comprises a. treating at least one activated metalloaluminophosphate molecular sieve 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 under conditions to chemisorb and/or physisorb the nitrogen-containing compound with the metalloaluminophosphate molecular sieve, wherein the nitrogen-containing compound is of the following general formula: NR 1 R 2 R 3 (I) wherein R 1 , R 2 and R 3 may independently one or more of the following groups: C 1 -C 50 -alkyl, C 3 -C 50 -cycloalkyl, aromatic, alkyl substituted aromatic, such as C 1 -C 50 -alkyl substituted aromatic, aromatic substituted aliphatic moieties such as C 1 -C 50 -alkylene moieties substituted with one or more aromatic groups, C 1 -C 50 -hydroxyalkyl, amino- and/or hydroxyl-substituted C 1 -C 50 -alkyl, alkoxyalkyl such as C 2 -C 50 -alkoxyalkyl, dialkylaminoalkyl such as C 3 -C 50 -dialkylaminoalkyl, alkylaminoalkyl such as C 2 -C 50 -alkylaminoalkyl, heterocyclic, aromatic heterocyclic, alkyl substituted heterocyclic and alkyl substituted aromatic heterocyclic, such as C 1 -C 50 -alkyl substituted heterocyclic and aromatic heterocyclic compounds, and heterocyclic substituted aliphatic moieties such as C 1 -C 50 -alkylene moieties substituted with one or more aromatic groups and R 1 and R 2 may independently be hydrogen and R 1 and R 2 may form, with the nitrogen atom, a nitrogen-containing heterocycle, aromatic heterocycle, alkyl substituted heterocycle or alkyl substituted aromatic heterocycle, with the proviso that when R 3 is alkyl and R 1 and R 2 are independently hydrogen then R 3 is C 4 -C 50 -alkyl.