Casale Chemicals Sa

Casale Sa

Uwe Rodemerck

David Linke

Evgeny Kondratenko

Cristina Ferrini

Daniel Herein

A new process for producing a SAPO molecular sieve is disclosed wherein a mixture of a P source with an Al source is subjected to a digestion step under stirring before adding a Si source and a template. The slurry resulting after addition of all chemicals is subjected to a pH adjustment followed by the usual hydrothermal treatment at higher temperature in an autoclave. In this way, very pure highly crystalline SAPO molecular sieves such as SAPO-34 are obtained with a very high yield. In addition, the SAPOs produced this way have an exceptional activity in the dehydration reactions and can be employed as a active component of catalysts for the production of valuable dehydration products from methanol such as, but not limited to, olefins and dimethylether (DME).

Process for preparing silicoaluminophosphate (SAPO) molecular sieves, catalysts containing said sieves and catalytic dehydration processes using said catalysts

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Rostock, Germany

Uwe Rodemerck