Haldor Topsoe A/s

Peter N R Vennestrøm

Ton V W Janssens

Manuel Moliner Marín

Avelino Corma Canós

Joakim Reimer Thøgersen

Arkady Kustov

Marie Grill

Antonio Eduardo Palomares Gimeno

Cristina Franch Marti

Method for the preparation of a metal-exchanged zeolites or mixtures of metal-exchanged zeolites, such as Cu-SSZ-13, Cu-ZSM-5, Cu-beta, or Fe-beta, comprising the steps of providing a dry mixture of a) one or more microporous zeotype materials that exhibit ion exchange capacity and b) one or more metal compounds; heating the mixture in a gaseous atmosphere containing ammonia to a temperature lower than 300&#xb0; C. for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the zeolite material; and obtaining the metal-exchanged zeolite material.

Method for producing metal exchanged zeolites by solid-state ion exchange at low temperatures

Method for the preparation of a metal exchanged crystalline microporous metalloaluminophosphate or mixtures containing metal exchanged microporous metalloaluminophosphates materials comprising the steps of providing a dry mixture containing a) one or more metalloaluminophosphates starting materials that exhibit ion exchange capacity, and b) one or more metal compounds; heating the mixture in a gaseous atmosphere containing ammonia to a temperature (less than 300 C) and for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the crystalline microporous material; and obtaining the metal-exchanged microporous metalloaluminophosphate material or mixtures containing the metal-exchanged microporous metalloaluminophosphate material.

Method for producing metal exchanged metallo-aluminophosphates by solid-state ion exchange at low temperatures

A method is disclosed for the preparation of a metal exchanged microporous materials, e.g. metal exchanged silicoaluminophosphates or metal exchanged zeolites, or mixtures of metal exchanged microporous materials, comprising the steps of providing a dry mixture of a) one or more microporous materials that exhibit ion exchange capacity and b) one or more metal compounds; heating the mixture in a gaseous atmosphere containing ammonia and one or more oxides of nitrogen to a temperature and for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the microporous material; and obtaining the metal-exchanged microporous material.

Method for producing metal exchanged microporous materials by solid-state ion exchange

An exhaust gas cleaning system, comprising an active regenerable particulate filter and an SCR catalyst comprising a hydrothermally microporous stable zeolite having the AEI type framework and being promoted with copper, where the zeolite is SSZ-39.

System for the purification of exhaust gas from an internal combustion engine

The invention provides a method and system for the purification of exhaust gas from an internal combustion engine, comprising a filter and a SCR catalyst. The filter is periodically regenerated increasing the temperature of the exhaust gas up to 850&#xb0; C. and the water vapor content up to 100% by volume. The SCR catalyst comprises a hydrothermally microporous stable zeolite and/or zeotype having the AEI type framework and being promoted with copper.

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Copenhagen, Denmark

Peter N R Vennestrøm