Ifp Energies Nouvelles

David Berthout

Malika Boualleg

Bogdan Harbuzaru

Eric Llido

Raquel Martinez Franco

Raquel Martinez-Franco

Laëtitia Jothie

The invention relates to a process for preparing a catalyst based on a zeolite of AFX structural type and on at least one transition metal, comprising at least the following steps: i) mixing, in an aqueous medium, of at least one source of silicon in oxide form SiO, of at least one source of aluminium in oxide form AlO, of an organic nitrogen-comprising compound R, of at least one source of at least one alkali metal and/or alkaline-earth metal M until a homogeneous precursor gel is obtained; ii) hydrothermal treatment of said precursor gel to obtain a crystallized solid phase, iii) at least one ion exchange with a transition metal; iv) heat treatment. The invention also relates to the catalyst capable of being obtained or directly obtained by the process and to the process for the selective reduction of NOx employing the catalyst.

Rapid synthesis of a catalyst comprising a zeolite having an AFX structure and at least one transition metal for selective NOx reduction

The present invention relates to a process for the rapid synthesis of an AFX-structure zeolite comprising at least:

Method for fast synthesis of an AFX-structure zeolite with a FAUjasite source

The invention relates to a catalyst comprising a mixture of AFX-structure and BEA-structure zeolites and at least one additional transition metal, to the process for preparing same and to the use thereof for the selective catalytic reduction of NOx in the presence of a reducing agent such as NHor H.

Catalyst comprising a mixture of an AFX-structure zeolite and a BEA-structure zeolite and at least one transition metal for selective reduction of NOx

The invention relates to a process for preparing an AFX-structure zeolite comprising at least the following steps:

Method for preparing a high-purity AFX structural zeolite with a nitrogen-containing organic structuring agent

The invention concerns a process for preparing a copper-comprising SAPO material with AFX structure, comprising at least the steps of mixing, in an aqueous medium, at least one aluminum source, at least one silicon source, at least one copper source, at least one phosphorus source, a TETA complexing agent and a TMHD structuring agent, in order to obtain a gel, and hydrothermal treatment of said gel with a shear rate of less than 50 sin order to obtain crystallization of said copper-comprising SAPO material with AFX structure.

Direct synthesis of a SAPO material with AFX structure comprising copper and use of this material

The invention concerns a process for preparing a copper-comprising microporous aluminosilicate material with AFX structure, comprising at least the steps of mixing, in an aqueous medium, at least one aluminum source, at least one silicon source, at least one copper source, a TETA or TEPA organic complexing agent and a DABCO-C4 structuring agent, in order to obtain a gel, and hydrothermal treatment of said gel with stirring in order to obtain crystallization of said copper-comprising microporous aluminosilicate material with AFX structure.

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Vaugneray, France

David Berthout