| abstract |
The present invention relates to a process for the preparation of a zeolite material having a BEA-type framework structure comprising YO 2 and X 2 O 3 , comprising the steps of: (1) mixing a mixture comprising at least one source of YO 2 and at least one source of X 2 O 3 Lt; / RTI > (2) crystallizing the mixture obtained in step (1); (3) performing an ion-exchange procedure with copper for the zeolite material having the BEA-type framework structure obtained in step (2); And (4) performing an ion exchange procedure with Fe for the Cu ion-exchanged zeolite material obtained in step (3), wherein Y is a tetravalent element, X is a trivalent element, Wherein the mixture provided in step (1) and crystallized in step (2) further comprises a column comprising at least one zeolite material having a BEA-type framework structure, wherein step (2) ) Does not contain an organic template as a structure-directing agent, and also relates to a process for the treatment of NO x by the zeolite material itself with a BEA backbone structure, and in particular by selective catalytic reduction (SCR) ≪ / RTI > |